All Calculators

Calculate your take-home commission across flat, tiered, and real estate split structures. Handles franchise fees, broker splits, and blended effective rates. Know your true payout.

Canadian mortgage calculator with legally-correct semi-annual compounding, CMHC insurance premiums, and accelerated bi-weekly payment comparison. Get the right numbers for Canada.

Compare your tax bill filing as singles vs. married filing jointly with 2026 IRS brackets. See your marriage penalty or bonus in seconds with a side-by-side breakdown.

Project your pension balance from now through retirement. See your projected balance, inflation-adjusted value, and 4% Rule monthly payout with a free PDF report.

Calculate your RMD using the IRS Uniform Lifetime Table with SECURE 2.0 age rules (73 for born 1951-1959, 75 for born 1960+). See 10-year projected RMDs and your life expectancy factor.

Generate a complete depreciation schedule using Straight-Line, Double Declining Balance, or Sum-of-the-Years'-Digits. Shows each year's depreciation expense, accumulated depreciation, and book value.

Calculate your business loan payment with origination fees, total interest, and cash disbursed. Enter net operating income to get a Debt Service Coverage Ratio with approval likelihood analysis.

Compare your current debt path vs. consolidating into a personal loan — including origination fees. See monthly savings, total interest saved, and a side-by-side cost comparison for up to 3 debts.

Calculate your post-graduation monthly payment and lifetime loan cost. Toggle between subsidized and unsubsidized loans to see the exact impact of interest capitalization while in school.

Calculate Yield to Maturity for any bond from face value, coupon rate, market price, and years to maturity. Shows current yield, discount/premium status, and the YTM approximation formula.

Project your Roth IRA balance with 2026 contribution limits ($7,500 base, $8,600 for 50+). See tax-free growth, contributions vs. earnings, and your tax advantage over a traditional IRA.

Find your maximum safe rent based on income using the 30% Rule, 40x Rule (NYC), or conservative 25% rule. See a pie chart of your budget split across rent, debts, and remaining cash.

Estimate federal estate tax based on your gross estate, deductions, and filing status. Includes 2025 federal exemption ($13.99M) and all 12 states with estate taxes. See if your estate is below the exemption.

Estimate your monthly Social Security benefit at any claiming age from 62 to 70. Compare early, full retirement age, and delayed benefits in a side-by-side chart.

Calculate your monthly payout from a lump sum or how long your savings will last. Features inflation-adjusted projections, a depletion chart, and a year-by-year balance table.

Compare Debt Snowball vs. Debt Avalanche strategies with a side-by-side timeline and per-card payoff dates. See how much time and interest each strategy saves for your debts.

Project your 401(k) balance at retirement with salary growth and employer match. See your contributions, employer match, and investment returns in a stacked chart.

Calculate the effective interest rate from a starting principal and final amount. Supports compound and simple interest across any time period. Shows the algebraic formula used to isolate r.

Add sales tax to a price or extract the tax from a total amount collected. The "Extract Tax" mode is essential for e-commerce and retail business owners who need to know how much to remit.

Find out the maximum home price you can afford based on your income, debts, and down payment. Uses DTI ratios (28%/36%/43%) to work backward from your income — the first step in any home search.

Calculate how much your savings will grow or how much to save monthly to reach a goal. Perfect for emergency funds, down payments, or any savings target with a growth chart.

Solve for Future Value, Present Value, Number of Periods, Interest Rate, or Payment Amount. The standard TVM solver used by finance professionals and students — identical to the HP 12C and TI BA II+.

Find your new debt-free date and total interest saved with extra monthly payments, yearly lump sums, or a one-time principal payment. See the side-by-side interest comparison chart.

Compare 15-year vs 30-year mortgages side by side with different rates, PMI, property taxes, and insurance. See the payment difference, total interest, and lifetime savings to choose your ideal term.

Calculate your Texas mortgage payment including property taxes (~1.8%), PMI, and the Texas Homestead Exemption. See how no state income tax and first-time homebuyer programs affect your payment.

Calculate your New York mortgage payment including property taxes (~1.6%), STAR school tax exemption, and mortgage recording tax closing costs. Includes SONYMA first-time homebuyer programs.

Calculate your California mortgage payment with Prop 13 tax limits (~0.77%), Mello-Roos assessments, and state income tax. Includes CalHFA down payment assistance for first-time buyers.

Estimate your 2025 federal income tax, FICA, and state tax. See your marginal vs. effective tax rate, the exact bracket breakdown, and estimated take-home pay for all pay periods.

Convert any salary between hourly, daily, weekly, bi-weekly, semi-monthly, monthly, and annual. See estimated net take-home pay for each period with 2025 tax estimates.

Find out if you are on track for retirement. Enter your age, current savings, monthly contributions, and target retirement age to see your projected nest egg and retirement income gap.

See the full amortization schedule for any loan and calculate exactly how much time and interest extra monthly or annual payments save. Compare standard vs. accelerated payoff side-by-side.

Project the future value of any investment with regular contributions. See three return scenarios (expected, optimistic, pessimistic) and a breakdown of your contributions vs. market returns.

Convert between 30+ currencies using live exchange rates from the European Central Bank. See the exact rate, timestamp, and inverse rate.

Calculate the inflation-adjusted value of any dollar amount from 1913 to today using official US CPI data from the Bureau of Labor Statistics. See cumulative and average annual inflation rates.

Calculate monthly payments, total interest, and total cost for any personal or business loan. Includes a full amortization schedule with extra payment savings.

Calculate your exact monthly payment, cash received, and true total cost with origination fees. Choose fee deducted from proceeds or added to balance. Full amortization schedule included.

Build your monthly budget with the 50/30/20 framework. See your actual spending vs. ideal split across Needs, Wants, and Savings categories with a donut chart comparison.

Calculate IRR and NPV for any investment with multiple cash flows over time. Add up to 10 years of projected cash flows and benchmark against S&P 500 and real estate returns.

Calculate the true APR of any loan by factoring in origination fees, closing costs, and other upfront charges. See exactly how fees raise your effective borrowing cost above the stated interest rate.

Calculate your VA loan payment including the VA Funding Fee for first vs. subsequent use. Covers disability exemptions, roll-in or upfront fee options, and conventional loan comparison with PMI.

Calculate your maximum HELOC based on home value, mortgage balance, and CLTV limit (80-90%). See your tapable equity, interest-only payment, and a complete equity breakdown chart.

The definitive rent vs. buy analysis. Find the exact year buying becomes cheaper than renting, accounting for appreciation, equity, PMI, down payment opportunity cost, and selling costs.

Calculate the present value of a future sum using the Time Value of Money formula. Supports all compounding frequencies with formula display, growth timeline, and investment benchmarks.

Calculate simple or compound interest for any principal, rate, and time period. Supports annual, monthly, and daily time periods and all compounding frequencies.

Calculate your monthly loan payment instantly. Solve for payment, loan amount, or term. See how much you can borrow and how long it takes to pay off any loan with a full amortization schedule.

Calculate how your investment grows over time with compound interest. Enter your principal, rate, and time period to see your future value and total interest earned.

Calculate your return on investment with both basic ROI and annualized ROI (CAGR). Enter your initial investment, total return, and holding period to get your true per-year return rate.

Convert your annual salary to an equivalent hourly rate. Enter your salary and working hours to see your hourly, daily, weekly, and monthly rates.

Calculate how much to pay monthly to be debt-free by a target date, or see your payoff timeline for a fixed payment. Shows debt-free month and the true cost of minimum payments.

Calculate your total net worth by entering your assets and liabilities. Get a clear picture of your financial health with your net worth, debt-to-asset ratio, and more.

Find out how much house you can afford based on your income, debts, and down payment. Calculates your maximum home price using front-end and back-end DTI ratios.

Analyze rental property investments with state-specific tax rates for all 50 states. Calculate cash flow, cap rate, cash-on-cash return, NOI, DSCR, and gross rent multiplier with an expense waterfall chart.

Calculate your monthly mortgage payment, full amortization schedule, and extra payment savings. Simulate extra payments to see how much interest and time you save.

Compare the true financial cost of renting vs. buying a home over your planned timeline. Accounts for appreciation, equity, taxes, and maintenance.

Calculate your front-end and back-end debt-to-income ratios to see if you qualify for a mortgage. Lenders typically require a DTI below 43%.

Estimate buyer and seller closing costs for a real estate transaction. See itemized fees including origination, title insurance, agent commissions, and more.

Calculate the capitalization rate, NOI, and gross rent multiplier for any investment property. Essential for comparing rental property investments.

See the full amortization schedule for any loan with interactive year and month views. Add extra payments to see time and interest saved, then export to CSV.

Project the future cost of college for your child using College Board 2024–25 averages. Enter current savings, monthly contributions, and institution type to see your funding gap and how much more you need to save each month.

Calculate your FHA loan monthly payment including all MIP costs. See the complete MIP cost breakdown over time — upfront premium (1.75% financed), annual MIP, and total MIP paid over 1, 5, 10, and 30 years.

Calculate CD maturity amounts across all major US banks with real benchmark rates from Ally, Marcus, Discover, Capital One, and more. Supports daily, weekly, monthly, quarterly, semi-annual, and annual compounding. Includes laddering strategy and early withdrawal penalty guidance.

Calculate the compound annual growth rate (CAGR) and simple average return for any investment. Enter start/end values or a comma-separated list of annual returns to see volatility drag — the gap between simple and compound returns.

Calculate monthly boat loan payments including insurance, maintenance, and storage costs that can equal the loan payment itself. See the true total cost of ownership over 10–20 year marine loans.

Calculate VAT for any amount across 40+ countries. Add VAT to a net price or remove it from a gross total. Country selector auto-fills standard VAT rates (UK 20%, Germany 19%, Hungary 27%, etc.). Essential for business invoicing and expense reporting.

Calculate stackable discounts applied sequentially (20% + 10% ≠ 30%). Includes a full shopping cart with add/remove items, per-item discounts, sales tax, and real-time totals. See the effective discount rate and what you actually pay.

Project mutual fund growth and see exactly how expense ratios eat your returns. Compare index funds (0.03% ER) vs. actively managed funds (1.50% ER) with an interactive with-fees vs. without-fees growth chart.

Compare Traditional IRA vs. Roth IRA side-by-side with 2026 IRS contribution limits ($7,000 base, $8,000 age 50+). See the breakeven retirement tax rate, decision insight guidance, and tax-free vs. tax-deferred growth visualization.

Calculate your exact per-paycheck take-home pay for any pay frequency (weekly, bi-weekly, semi-monthly, monthly). Supports annual salary and hourly wage with 2026 federal brackets, FICA, and all 50 state tax rates. Interactive pie chart shows where every dollar goes.

Calculate whether refinancing your mortgage makes financial sense. Enter your current loan terms, new loan offer, closing costs, and planned stay to get a clear Yes/No/Wait recommendation based on break-even analysis.

Calculate how much home equity you can borrow with a fixed-rate home equity loan. See max LTV by credit profile, monthly payment, and an equity stack bar chart showing how your home value is distributed across mortgage, loan, and remaining equity.

Plan your home down payment savings. Enter your target home price, current savings, and monthly contribution to see your timeline, total PMI cost if under 20% down, and estimated monthly mortgage payment.

Calculate the payback period for any investment. Toggle between simple payback and discounted payback (with time value of money). See NPV, profitability index, and total return alongside the payback analysis.

Calculate the future value of any investment with compound interest and optional monthly contributions. See the rendered formula with your numbers plugged in, effective annual rate, and a year-by-year growth breakdown table.

Calculate your Maximum Allowable Offer (MAO) for any fix-and-flip deal. Enter the After Repair Value, repair costs, holding costs, and target profit to see your MAO, estimated profit, ROI, and the 70% Rule benchmark — with an interactive profit gauge chart.

Calculate your self-employment (SECA) tax with a full Social Security and Medicare breakdown. Enter your 1099 net profit and optional W-2 wages to see the SS wage base remaining, Medicare portion, deductible half, and estimated QBI deduction savings.

Calculate year-by-year depreciation schedules using Straight Line or MACRS (200% Declining Balance with half-year convention). See a bar chart of depreciation by year, an asset value decline line graph, and a full year-by-year schedule table.

Estimate Ethereum gas fees for any transaction type — standard transfer, ERC-20 token, Uniswap swap, NFT mint, or complex contract. See slow/standard/fast speed tiers in both ETH and USD.

Calculate your path to financial independence with the FIRE framework. Enter your age, net worth, income, and expenses to see your FIRE number, estimated FIRE age, and years to go. Supports Standard, Lean, Fat, and Coast FIRE with a timeline chart and savings rate analysis.

Convert your annual salary to an equivalent hourly rate based on hours per week and weeks per year. See daily, weekly, monthly, and annual breakdowns.

Calculate your true take-home pay after federal income tax, FICA, and state taxes. See your net annual salary, per-paycheck amount, and complete tax breakdown with effective tax rate for any filing status.

Calculate capital gains tax for stocks, crypto, and real estate. Enter purchase price, sale price, holding period, income, and filing status. Uses 2026 IRS brackets with NIIT (3.8%) and state tax support.

Estimate your federal income tax using progressive tax brackets. See marginal rate, effective rate, and whether you will owe or get a refund.

Calculate your SIP maturity amount with monthly investments.

Calculate how long your retirement corpus lasts with monthly SWP withdrawals.

Calculate wind chill temperature using the official NWS formula. Includes frostbite risk assessment and safety guidelines for outdoor activities.

Calculate the heat index using the NOAA/NWS formula. Includes OSHA danger tier warnings for heat safety during outdoor work and sports.

Calculate the dew point from temperature and relative humidity using the Magnus formula. Includes a human comfort scale from dry to oppressive.

Roll virtual dice from D4 to D20 with modifiers. Uses cryptographically secure random values. Beautiful animated SVG dice faces — perfect for D&D, tabletop RPGs, and board games.

Calculate your effective dots per inch (eDPI) from DPI and in-game sensitivity for popular FPS games. Converts between in/360 and cm/360 for precise muscle memory tuning across Valorant, CS2, Overwatch, Apex, and Call of Duty.

Discover your compatibility score with a fun, deterministic love algorithm. Includes zodiac compatibility insights, shareable results card, and flavor text for every match level.

Convert shoe sizes between US, UK, EU, and Japan/CM systems. Supports both men's and women's sizing with intelligent interpolation for half sizes. Perfect for international online shopping.

Convert clothing sizes between US, UK, EU, and Japanese sizing for dresses, shirts, shoes, and more. Includes men, women, and children sizes.

Calculate the exact time remaining until any date. See days, weeks, months, and hours until your next event, birthday, or deadline.

Find your correct bra size using the modern 6-measurement method (underbust loose/snug/tight, bust standing/leaning/lying). Includes sister sizes and explains why the traditional +4 method is outdated.

Calculate the best bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed by timing your alarm to the end of a sleep cycle.

Calculate your World Handicap System (WHS) index from recent rounds. Supports 5 to 20 rounds with proper differential selection.

Calculate the true final price after stacked discounts and local sales tax. See why "20% off plus an extra 10%" is NOT 30% off, and get the real effective discount percentage.

Calculate your exact age in years, months, and days. Also shows total days, weeks, months, and hours lived — plus days until your next birthday.

Calculate percentages instantly. Find what percent of a number is, percentage change, add or subtract a percentage, and more.

Calculate how many study hours you need based on material volume and deadline. Plan your weekly schedule and avoid last-minute cramming.

Calculate the tip amount and split a restaurant bill among multiple people. Choose your tip percentage and see the per-person total instantly.

Count the exact number of working days (business days) between two dates, excluding weekends and US federal holidays.

Count words, characters, sentences, and paragraphs in any text. Estimates reading time based on average reading speed.

Convert Robux, V-Bucks, and Roblox Premium to USD using official package pricing. See the effective exchange rate per unit and which package gives the best value — find the cheapest way to buy virtual currency.

Find the moon phase, illumination percentage, and zodiac sign for any date. See the phase emoji, next full moon date, and days until the next full moon. Perfect for astronomy enthusiasts, photographers planning shoots, and astrology curiosity.

Convert pixels to inches at any DPI/PPI. Includes presets for web (72), screen (96), draft (150), and print (300 dpi). See the equivalent print size for A4, letter, 4×6, 5×7, 8×10, and passport photos.

Calculate the aspect ratio from any width and height. Identify common presets (16:9, 4:3, 1:1, 3:2, 21:9, 9:16) or find the missing dimension when you know one side and the target ratio.

Convert oven temperatures between Fahrenheit, Celsius, and Gas Mark. Includes a cooking temperature reference table with descriptions (Slow, Moderate, Hot, Very Hot). Perfect for following recipes from any country.

Convert BPM to delay times in milliseconds for any note value (whole, half, quarter, eighth, sixteenth, dotted, triplet). Includes reverse mode (ms to BPM) and preset BPMs for house, trap, dnb, and lofi.

Scale any recipe up or down by changing the serving size. Enter ingredients with fractions like "1 1/2 cups" and get exact scaled quantities. Covers unit conversions for cups, ml, oz, tbsp, tsp, grams, and more.

Estimate how long it takes to read any text based on word count, reading speed, and content type. Includes breaks for long sessions.

Calculate exactly how much beer, wine, and liquor to buy for your wedding or party. Based on guest count, drinking percentage, event duration, and drink preferences. Includes bottle and case estimates.

Calculate your net and gross typing speed in WPM. Paste your source text and what you typed to get accuracy percentage, error count, and net WPM. Includes a practice mode with timer.

Track your days in the Schengen Area with the 90/180 day rule. Enter your trips to see total days used, remaining days, and whether future dates will exceed the limit. Essential for frequent European travelers.

Convert betting odds between American, Decimal, and Fractional formats. See the implied probability, payout, and profit for any stake. Enter any format and get all conversions instantly.

Calculate depth of field for any camera setup. Enter sensor size, focal length, aperture, and subject distance to find near/far focus limits and hyperfocal distance. Supports full-frame, APS-C, Micro 4/3, and more.

Estimate yarn yardage needed for scarves, blankets, sweaters, hats, and more. Adjusts for yarn weight and gauge. Includes precut fabric converter: jelly rolls, layer cakes, charm packs, fat quarters, and fat eighths.

Calculate your Life Path number from your birth date with detailed personality descriptions for numbers 1-9 and master numbers 11, 22, 33. Includes step-by-step reduction and zodiac sign lookup.

Calculate your Body Mass Index and ideal weight range for your height. Features a WHO classification visual gauge with color-coded BMI bands, needle indicator, classification risk table, and medical disclaimer.

Find your maintenance calories in seconds. Uses Mifflin-St Jeor and Katch-McArdle equations with BMR/TEF/EAT/NEAT breakdown. Get your personalized calorie goal for weight loss, gain, or maintenance.

Calculate your estimated due date from LMP, conception date, or IVF transfer date. View current pregnancy week, trimester milestones timeline, and days remaining.

Track your pregnancy week by week. Calculate due date, current trimester, gestational age, and key milestones from your last menstrual period.

Calculate your Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas. Features a visual formula comparison panel with side-by-side bars.

Calculate your 5 training heart rate zones using the Karvonen formula or percentage of max HR. Features a visual zones panel with explicit formula display (THR = ((HRmax − HRrest) × %Intensity) + HRrest).

Calculate your recommended daily water intake based on body weight, activity level, and climate. Get your personalized hydration goal in liters, ounces, and cups.

Calculate your body fat percentage using the U.S. Navy circumference method. Uses neck, abdomen (men), and waist/hip (women) measurements with anatomical measurement guide.

Calculate your ideal body weight using Devine, Robinson, Miller, and Hamwi formulas. Get the average across all four plus healthy BMI range for your height.

Calculate your daily macronutrient targets based on TDEE, fitness goal, and diet preference. Supports Standard, Low-Carb, Keto, High-Protein, and Mediterranean splits.

Track your pregnancy weight gain against IOM guidelines based on pre-pregnancy BMI. See recommended total gain range, weekly targets, and your gain status.

Calculate your fertile window, peak fertility days, and estimated ovulation date. Also supports IVF transfer date due date calculation (Day 3 and Day 5 embryos) and target-due-date reverse conception planning. Plan conception timing with probability-based fertile day tracking.

Calculate running pace, time, or distance. Includes auto-generated race split table with wristband view for marathon, half marathon, 10K, 5K, and custom distances.

Calculate body fat using the official U.S. Army AR 600-9 tape test method. Includes pass/fail by age bracket, screening weight reference, and regulation-quoted measurement protocol.

Calculate your daily carbohydrate needs based on weight, goal, and training volume. Includes glycogen loading timeline for endurance events and food equivalents.

Calculate your lean body mass using Boer, James, and Hume formulas simultaneously. Get estimated fat mass and lean mass percentage without body fat measurements.

Determine your healthy weight range using BMI, Waist-to-Height Ratio (WHtR), and frame size adjustment. Features the "waist less than half your height" rule.

Calculate your daily calorie needs using BMR and activity level. Compare intake vs. burned to plan weight loss, gain, or maintenance.

Calculate calories burned for 100+ activities using MET values from the Compendium of Physical Activities. Categorized by running, cycling, strength, swimming, sports, and more.

Calculate your one rep max using Epley, Brzycki, and Lombardi formulas. Includes auto-generated 50–100% percentage breakdown table for barbell training programming.

Calculate your daily protein needs based on the evidence-based range of 1.6–2.2 g/kg. Includes per-meal breakdown, MPS optimization, and food equivalent guide.

Calculate your daily fat intake recommendation with a saturated/monounsaturated/polyunsaturated breakdown. Features AHA 5–6% saturated fat limit guideline, visual breakdown panel, and omega-3 targets.

Track your menstrual cycle and predict periods, ovulation dates, and fertile windows for 3 months. 100% private — all data processed locally on your device with a visible privacy badge.

Calculate your estimated GFR in seconds. Enter your creatinine, age and sex to check your kidney function using the 2021 CKD-EPI equation. Includes CKD stages 1–5, kidney function level, and clinical staging chart.

Determine your body shape from bust, waist, and hip measurements. Classifies Pear, Apple, Hourglass, Rectangle, and Inverted Triangle shapes with styling tips and somatotype disclaimer.

Calculate your body surface area using Mosteller, Du Bois, and Haycock formulas. Includes formula comparison panel, BSA reference chart, and mandatory clinical dosing warning.

Estimate your blood alcohol concentration using the Widmark formula with impairment levels, time-to-zero, and time-to-legal-limit. Features bold harm-reduction disclaimer and standard drink reference guide.

Score any food using a macronutrient-weighted points formula based on calories, saturated fat, sugar, and protein. Not affiliated with Weight Watchers. Includes full point breakdown and reference food scores.

Assess your weight and cardiovascular risk by combining BMI with waist-to-height ratio (WHtR). Features visceral fat education, actionable risk reduction steps, and the "waist less than half your height" rule.

Check if chocolate is toxic for your dog. Calculates theobromine and caffeine intake based on chocolate type, amount eaten, and dog weight. Includes severity color coding, vomiting and seizure thresholds, and emergency guidance with ASPCA poison control number.

Convert your pet's age to human years using the NIH epigenetic clock formula (16×ln(age)+31 for dogs) and the standard cat formula. Includes AAHA/AAFP life stage classification and size-adjusted dog aging.

Calculate the due date for a pregnant dog (63 days gestation) or cat (65 days gestation). Includes trimester stages, days remaining countdown, and week-by-week development calendar.

Predict possible blood types for a child based on parent ABO and Rh types. Visualize inheritance with Punnett square probabilities. Learn how the 3-allele ABO system and Rh dominance genetics work.

Calculate gross profit margin, markup percentage, and selling price. Converts between margin and markup with full profit breakdown.

Calculate your Cost of Goods Sold using the inventory accounting formula. Includes gross profit margin and COGS as a percentage of revenue.

Calculate your break-even point in units and revenue. Enter fixed costs, selling price, and variable cost per unit to find when your business becomes profitable.

Calculate Amazon FBA fees, net profit, ROI, and margin for any product. Includes referral fees, fulfillment fees, and estimated storage costs.

Calculate your ROAS and break-even ROAS based on gross margin. Determine if your advertising campaigns are truly profitable.

Calculate customer acquisition cost and LTV:CAC ratio. Evaluate the efficiency of your marketing spend and payback period.

Solve for Gross Margin %, Markup %, Cost, or Revenue — choose what you know and calculate what you need. See why 50% markup does not equal 50% margin, and get the exact gross profit in dollars.

Calculate customer lifetime value (LTV), customer acquisition cost (CAC), LTV:CAC ratio, payback period, and the SaaS Magic Number. Understand your unit economics with a gauge chart showing the 3:1 golden standard.

Compare Stripe and PayPal transaction fees side by side. Enter your transaction amount to see the exact fee, net amount, effective rate, and monthly volume impact for both processors.

Estimate YouTube AdSense revenue from views, CPM, and RPM. Calculate gross revenue, estimated monthly earnings, and net after Google's 45% cut. Supports multiple niche CPM presets from gaming to finance.

Calculate all Etsy seller fees for any item: listing fee ($0.20), transaction fee (6.5%), payment processing (3% + $0.25), and optional offsite ads fee (12% or 15%). See your net profit and effective fee rate.

Calculate CPM (cost per mille) and CPC (cost per click) from ad spend, impressions, and clicks. Includes reverse budget mode, CTR, and industry benchmark comparisons.

Calculate engagement rate for Instagram, TikTok, and X (Twitter). Platform-specific formulas including saves and shares. Benchmark gauge with influencer tier classification.

Calculate area and perimeter for circles, rectangles, triangles, squares, trapezoids, parallelograms, and hexagons.

Calculate the mean, median, minimum, and maximum from any data set. Paste messy data with dollar signs, commas, or line breaks — the smart parser handles it automatically.

A full-featured basic calculator with number pad, history tape, and order-of-operations support. Perfect for quick calculations with a running log.

Perform exact arbitrary-precision integer arithmetic using JavaScript BigInt. Add, subtract, multiply, divide, and exponentiate numbers with hundreds or thousands of digits — beyond what standard calculators can handle.

Convert between Decimal, Binary, Hex, and Octal with positional value breakdown. Perform arithmetic and bitwise operations (AND, OR, XOR, NOT, shifts) across all bases.

Calculate radius, diameter, circumference, and area of a circle. Input any one measurement — radius, diameter, circumference, or area — to find all others with reverse engineering steps.

Find all common factors shared by two numbers. Lists every divisor that divides both numbers evenly, with the Greatest Common Factor (GCF) highlighted.

Calculate confidence intervals for a population mean. Breaks out the Margin of Error (MOE), critical Z-value, and standard error. Supports 90%, 95%, and 99% confidence levels.

Convert between hundreds of units across 8 categories: weight, length, temperature, volume, data, speed, area, and currency. The smart base-unit approach handles even complex temperature formulas.

Add or subtract years, months, weeks, and days from any date. Includes a business-days-only mode that skips weekends — perfect for project management and legal deadlines.

Calculate the distance between two points in 1D, 2D, or 3D space. Shows the distance formula, step-by-step calculation, midpoint, and slope in an interactive format.

Calculate any base raised to any power. Supports positive, negative, and fractional exponents. Shows expanded form and fraction conversion.

Find all factors of any positive integer. Outputs a complete factor pairs table, total factor count, sum of factors, and identifies whether the number is prime.

Add, subtract, multiply, and divide fractions with step-by-step solutions. Shows LCM for common denominators and simplifies using GCD.

Convert fractions to decimals, decimals to fractions, and mixed numbers to decimals. Automatically simplifies fractions using GCD.

Find the Greatest Common Factor of two numbers using the Euclidean algorithm. Visualizes shared prime factors with a dynamic Venn diagram.

Calculate Nominal and Real GDP using the expenditure approach: GDP = C + I + G + (X − M). Includes GDP deflator for inflation-adjusted Real GDP and component share breakdown.

Calculate your Grade Point Average from course grades and credits. Includes weighted GPA (AP, Honors, IB), and a Target GPA mode that tells you the grades you need to reach your goal.

Determine what score you need on your final exam to achieve your target overall grade. Supports any current grade, desired grade, and exam weight combination.

Solve radioactive decay problems using the half-life formula. Calculate remaining quantity, initial quantity, half-life, or time elapsed with step-by-step solutions.

Predict a child's adult height using the Mid-Parental Height (Tanner) method. Shows expected range with medical disclaimer.

Find the Least Common Multiple of two or more numbers. Shows both the List of Multiples method and the Prime Factorization method side by side.

Calculate logarithms with any custom base. Shows change of base formula, common log, natural log, and binary log conversions.

Perform long division with the traditional tableau format. Shows each step — divide, multiply, subtract, bring down — just like the classroom method.

Calculate percentages in five different ways: what is X% of Y, X is what percent of Y, percent change, add or subtract a percentage.

Calculate the determinant and inverse of square matrices from 2×2 to 5×5. Shows step-by-step calculation with LaTeX-style formatting for college assignments.

Calculate the mean, median, mode, and range from any data set. Shows sorted data with step-by-step median calculation for even-numbered datasets.

Identify arithmetic, geometric, and Fibonacci sequences. Find common difference, common ratio, nth-term formula, and compute next terms.

Calculate any nth root — square roots, cube roots, and beyond. Shows both radical form and fractional exponent equivalent with step-by-step verification.

Calculate p-values from Z-scores or T-scores with one-tailed or two-tailed tests. Provides an English-language conclusion of statistical significance.

Calculate percent error between accepted and experimental values. Includes absolute error, signed error, accuracy, and step-by-step solution.

Calculate permutations (nPr) and combinations (nCr) with step-by-step factorial breakdown. Toggle between order matters vs. does not matter to see the correct formula.

Break any number into its prime factors using the Fundamental Theorem of Arithmetic. Includes a visual factor tree showing how the number branches into primes.

Calculate P(A and B), P(A or B), P(not A), P(not B), and P(A|B) for independent or mutually exclusive events. Includes SVG Venn diagram and educational explanations.

Solve right triangles using the Pythagorean theorem and SOH CAH TOA trigonometry. Find sides, angles, area, and perimeter with a dynamic SVG triangle and step-by-step proof.

Solve any quadratic equation using the quadratic formula. Shows real and complex roots, discriminant, vertex, and axis of symmetry.

Generate cryptographically secure random numbers using Web Crypto API. Customizable range, count, decimal precision, and unique values.

Simplify ratios, find missing values in proportions, and scale dimensions. Includes common aspect ratio presets (16:9, 4:3, 1:1, 21:9) for digital designers and developers.

Round numbers to the nearest ten, hundred, tenth, hundredth, and more. Visual number line shows exactly why the number rounds up or down with step-by-step explanation.

Determine the ideal sample size for surveys and research studies. Adjust for population size, confidence level, and margin of error.

Full-featured scientific calculator with trigonometric functions, logarithms, memory operations, and calculation history.

Convert between decimal and scientific notation. Learn how the decimal point jumps left or right with an interactive movement visualization.

Find the slope between two points. Outputs slope, line equation in slope-intercept, point-slope, and standard forms with interactive graph.

Calculate standard deviation, variance, mean, median, and range from a data set. Supports both sample and population standard deviation.

Comprehensive descriptive statistics with a dynamic box-and-whisker plot. Computes mean, quartiles, IQR, standard deviation, variance, and highlights mathematical outliers.

Calculate time differences between start and end times, deduct breaks, and compute gross pay. Automatically handles overnight shifts and shows both decimal and HH:MM formats.

Track weekly work hours with day-by-day entries. Calculates regular and overtime hours, handles 12hr/24hr time formats, overnight shifts, and optional pay rate for gross pay estimation.

Convert time between 24 time zones worldwide with business hours overlay. Green-yellow-gray color-coded grid shows the best meeting times across multiple regions at a glance.

Solve any triangle using SSS, SAS, or ASA input modes. Computes all sides, angles, area, and perimeter with dynamic SVG visualization.

Calculate volume and surface area of spheres, cubes, rectangular prisms, cylinders, cones, and pyramids. Includes shape net visualizations that show each 3D shape unfolded.

Calculate the Z-score from a raw score, population mean, and standard deviation. Visualizes the result on a standard normal distribution curve with shaded probability area.

Convert numbers to Roman numerals and back, including date conversion. Features subtractive notation breakdown and tattoo verification.

Calculate density, mass, or volume using the density formula ρ = m/V. Includes unit conversion between g/cm³, kg/m³, and lbs/ft³ with step-by-step solutions.

Calculate mass, density, or volume using m = ρ × V. Shows planetary weight comparison on Earth, Moon, Mars, and Jupiter with unit conversions.

Calculate weight, mass, or gravitational acceleration using W = mg. Shows planetary weight comparison and human weight conversion.

Calculate speed, distance, or time using S = D/T. Converts between mph, km/h, m/s, and knots. Includes pace conversion (min/mile, min/km) and speed comparisons.

Calculate molarity, mass, or volume of chemical solutions. Features compound auto-detection with built-in molecular weight database and step-by-step solutions.

Calculate the molecular weight of any chemical formula. Supports parentheses, hydrates, and Unicode subscripts. Shows element breakdown with mass percentage composition.

Calculate the exact duration between two dates and times. Supports business days mode and multiple output formats for project management and payroll.

Count the exact number of days between two dates. Includes business days mode, end-date inclusion toggle, and breakdown into years, months, and days.

Find the day of the week for any date using Zeller's congruence. Features a perpetual calendar algorithm explanation and historical context.

Calculate pH from hydrogen ion concentration, convert between pH and pOH, and classify solutions as acidic, basic, or neutral. Essential for chemistry students and lab work.

Calculate the Pearson correlation coefficient between two variables. Shows r, r², strength, and direction with step-by-step work.

Compute key descriptive statistics for any dataset: mean, median, mode, range, variance, standard deviation, quartiles, and IQR.

Solve linear (ax + b = 0) and quadratic (ax² + bx + c = 0) equations instantly. Shows discriminant, roots, and step-by-step solutions.

Solve systems of two linear equations with two variables using Cramer's rule. Get step-by-step solutions with unique, infinite, or no solution cases.

Convert numbers between any two bases from binary (base 2) to base 36. Supports hexadecimal, octal, binary, and all custom bases.

Compute derivatives of polynomial expressions using the power rule. Get step-by-step differentiation and evaluate at any point.

Calculate sine, cosine, tangent and their reciprocals for any angle. Also find angles from trig values with reference angles.

Explore the unit circle by entering any angle. See coordinates, trigonometric values, reference angles, and the quadrant instantly.

Factor quadratic polynomials (ax² + bx + c) into their factored form with step-by-step work. Find the factors and zeros of any quadratic expression.

Evaluate polynomials at any point, see the degree, and get step-by-step substitution work. Enter coefficients for polynomials of any degree.

Check if any number is prime, find its prime factors, and get the divisor count. Supports numbers up to 10 million.

Calculate the factorial of any number from 0 to 170. Shows the step-by-step multiplication, digit count, and trailing zeros.

Calculate the nth Fibonacci number, view the full sequence, and get the sum. Uses iteration and Binet's formula for verification.

Apply the law of sines to solve triangles. Enter known side-angle pairs to find missing sides, angles, and the circumradius.

Solve triangles using the law of cosines. Find missing sides (SSS) or angles (SAS) with step-by-step work.

Compute inverse trigonometric functions: arcsin, arccos, and arctan. Get results in degrees and radians with the principal value.

Calculate definite integrals numerically using Simpson's rule. Supports polynomial, trigonometric, and exponential expressions.

Compute limits of functions as x approaches any value. Evaluate left-hand, right-hand, and two-sided limits with approach tables.

Sum mathematical series from any start to end value. Supports expressions with n, exponents, and common mathematical functions.

Compute Taylor series expansions of functions like e^x, sin(x), cos(x) around any center with customizable order.

Compute vector operations including addition, subtraction, dot product, cross product, magnitudes, and the angle between vectors in 2D or 3D.

Compute the cross product of two 3D vectors. Shows the resulting vector, magnitude, unit vector, and area of the parallelogram.

Calculate the dot product of two vectors, the angle between them, and determine if they are orthogonal. Supports 2D and 3D vectors.

Solve proportion equations a/b = c/d for any missing value. Enter three known values and find the fourth using cross-multiplication.

Find the least common denominator (LCD) for fractions and convert each fraction to its equivalent with the common denominator.

Calculate what grade you need on your final exam to achieve your target overall grade. Handles weighted grading systems with impossible target detection.

Calculate the exact volume of concrete needed for slabs, holes, columns, and stairs. Outputs cubic yards plus the number of 60-lb and 80-lb bags required at Home Depot.

Calculate the required BTUs for heating or cooling any room. Factors in climate zone, sun exposure, insulation, ceiling height, room type, and occupancy to recommend the perfect AC or furnace size.

Calculate square footage for rectangles, circles, and L-shaped rooms. Supports feet and meters, includes wastage for materials, and estimates total cost per square foot.

Calculate tiles needed for any room with different layout patterns. Supports grid, brick, diagonal, and herringbone layouts with automatic waste factors.

Estimate roofing materials for gable and hip roofs. Calculates squares, shingle bundles, felt rolls, and nails. Includes pitch multipliers and waste factors.

Design safe stairs with IBC-compliant rise/run calculations. Computes number of steps, riser height, tread depth, stringer length and angle. Warns if measurements violate International Building Code standards.

Calculate mulch volume for rectangular and circular garden beds. Compare costs between bagged (2 cu ft) and bulk delivery to find the most economical option.

Calculate gravel volume in cubic yards and tons for landscaping projects. Choose from pea gravel, crushed limestone, river rock, and decomposed granite with automatic weed barrier fabric calculation.

Calculate how many gallons of paint you need for any room. Enter dimensions, number of doors and windows, and coats to get an accurate paint quantity.

Calculate how many tiles you need for any floor or wall. Includes waste percentage for cuts, multiple tile sizes, and optional material cost estimate.

Calculate cubic yards of concrete needed for any slab, driveway, or foundation. Shows cubic yards for ready-mix ordering and equivalent bag counts.

Calculate cubic yards of mulch, topsoil, compost, gravel, or sand needed for any landscaping project. Shows bulk yards and equivalent bagged quantities.

Calculate how many sheets of drywall you need for walls and ceiling. Accounts for doors, windows, and a 10% waste allowance.

Calculate board feet of lumber for any project. Enter nominal dimensions, board length, and quantity to get total board feet and optional cost estimate.

Calculate engine horsepower from torque and RPM using the classic formula HP = (Torque × RPM) / 5252. Includes metric kW support and explains why 5252 is the magic constant where HP and torque curves intersect.

Estimate your vehicle's horsepower from quarter-mile ET and trap speed using the Hale formula. Includes drivetrain loss estimation (FWD/RWD/AWD) and power-to-weight ratio.

Calculate trip fuel costs for gas, diesel, EV, and PHEV vehicles. Handles unit conversions (MPG, L/100km, km/L), EV efficiency, PHEV split-mode (EV + gas), electricity rates, and COâ‚‚ emissions.

Calculate your fuel economy in MPG or L/100km using odometer readings or trip distance. Includes cost-per-mile analysis, annual fuel cost projection, and imperial MPG conversion.

Calculate IRS-standard mileage reimbursement for business, medical, and charitable driving. Includes tax savings estimates and additional expense tracking.

Calculate your real monthly car payment including trade-in value, negative equity, sales tax (applied to price minus trade-in), and all dealer fees. The tool to use at the dealership.

The dealer transparency tool. Calculate your exact monthly lease payment using MSRP, negotiated cap cost, residual value, and money factor (or APR). Instantly convert between money factor and APR to see the real interest rate dealers are charging.

The ultimate dealership survival tool. Instantly compare a cash rebate (at your bank rate) vs. promotional low-rate financing (like 0%) to find which option actually saves you more money.

Compare the true total cost of leasing vs. buying a vehicle over the same time period. Accounts for depreciation, equity, and total payments.

Calculate MPG from miles driven and fuel used, estimate trip fuel costs, determine driving range, or convert between MPG and L/100km.

Calculate the total fuel cost for any road trip. Split the cost among multiple passengers to find the per-person fuel expense.

Compare two tire sizes and calculate the diameter difference, speedometer error, and overall impact of changing to a different tire size.

Calculate how much a vehicle will depreciate over your ownership period. Shows total depreciation, future value, and monthly depreciation cost.

Decode 4/5/6-band resistor color codes to ohms or reverse-calculate the color bands from any resistance value. Includes tolerance range, temperature coefficient, and closest E-series match.

Calculate the energy cost of any electrical appliance. Pick from 20 common appliance presets or enter custom wattage, usage hours, and electricity rate. Projects daily, monthly, and yearly costs.

Calculate network address, broadcast address, usable host range, and total hosts for any IPv4 subnet. Includes binary representation and IP class detection.

Calculate file transfer times based on connection speed. Includes TCP overhead simulation and clear bit vs byte distinction (Mbps vs MB/s).

Generate cryptographically secure passwords with customizable length and character types. Includes passphrase mode, entropy calculation, strength meter, and estimated crack time. Uses Web Crypto API.

Encode text to Base64 or decode Base64 back to text instantly. Supports text and file input with live encoding and one-click copy.

Encode text for safe URL transmission or decode URL-encoded strings. Shows character mappings for special characters.

Estimate token counts for any text across OpenAI (cl100k_base), Claude, Llama 3, and General tokenizers. See token/character ratio, read time, generation time, and API cost estimates.

Calculate voltage, current, resistance, or power using Ohm's Law. Enter any two known electrical values to solve for the unknown.

Calculate voltage drop over a wire run based on AWG gauge, wire length, and current. Checks compliance with the NEC 3% recommended maximum.

Find the correct AWG wire gauge for any electrical circuit based on current, conductor material, insulation rating, and conduit fill. References NEC ampacity tables.

Calculate output RPM, output torque, or gear ratio for any gear system. Supports speed reduction, overdrive, and compound gear train analysis.

Calculate Mean Time Between Failures (MTBF), system reliability at a specific mission time, and expected number of failures for reliability engineering.

Calculate pipe flow velocity, volumetric flow rate, or required pipe diameter using the continuity equation. Supports GPM and metric units.

Compare token pricing across GPT-4o, GPT-4o-mini, Claude 3.5 Sonnet/Haiku, and Gemini 1.5 Pro/Flash. Estimate per-request, monthly, and annual costs with DAU scaling.

Generate cryptographic hashes locally in your browser using SHA-256, MD5, SHA-1, SHA-384, SHA-512, and Keccak-256 (SHA-3). Zero-knowledge — no data is sent to any server.

Generate GDPR-compliant cookie consent banners with customizable position, layout, and color theme. Get ready-to-use HTML/CSS code for your website.

Calculate API throughput including requests per second, bandwidth requirements, daily capacity, and burst limits. Supports AWS API Gateway, Cloudflare, Nginx, and custom server configurations with a traffic flow visualization.

Calculate pH, pOH, and concentrations of H⁺ and OH⁻ ions in aqueous solutions. Enter any value — pH, [H⁺], or [OH⁻] — to get the complete acid-base analysis with substance classification. Essential for chemistry students, lab work, and science education.

Convert between PSI, bar, kPa, MPa, atmospheres, torr, and inches of mercury. Free online pressure unit converter with instant results and common conversion tables.

Convert between Newton meters, pound-force feet, kilogram-force centimeters, and more. Free online torque unit converter for automotive and engineering use.

Convert between joules, calories, kilowatt-hours, BTUs, electronvolts, and more. Free online energy unit converter for physics, nutrition, and engineering.

Convert between watts, horsepower (mechanical, electric, metric), BTU per hour, and more. Free online power unit converter for engines and appliances.

Convert between newtons, pound-force, kilogram-force, kiloponds, dynes, and poundals. Free online force unit converter for physics and engineering.

Convert between kg/m³, g/cm³, lb/ft³, lb/in³, specific gravity, and more. Free online density unit converter for materials science and engineering.

Convert between degrees, radians, gradians, arcminutes, arcseconds, milliradians, and turns. Free online angle unit converter for geometry, navigation, and surveying.

Convert between hertz, kilohertz, megahertz, gigahertz, RPM, radians per second, and BPM. Free online frequency unit converter for electronics and audio.

Convert between miles per gallon (US/UK), liters per 100 km, km per liter, and gallons per 100 miles. Free online fuel economy converter for drivers and fleets.

Convert between Rockwell (HRC, HRB, HRA), Brinell (HBW), Vickers (HV), and Shore hardness scales per ASTM E140. Free online hardness converter for metallurgy.

Convert between pascal-seconds, poise, centipoise, stokes, centistokes, and more. Free online viscosity unit converter for lubricants and fluids.

Convert between volts, amps, ohms, farads, henries, siemens, and coulombs with metric prefixes. Free online electrical unit converter for electronics and engineering.

Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Free online temperature converter for cooking, science, weather, and engineering.

Convert between meters, feet, inches, centimeters, kilometers, miles, nautical miles, and more. Free online length unit converter for construction, travel, and engineering.

Convert between kilograms, pounds, ounces, stone, metric tonnes, and US tons. Free online weight converter for fitness, cooking, shipping, and science.

Convert between liters, gallons, cups, fluid ounces, cubic meters, cubic feet, and more. Free online volume converter for cooking, automotive, construction, and science.

Convert between km/h, mph, knots, meters per second, Mach number, and the speed of light. Free online speed converter for driving, aviation, physics, and weather.

Convert between square meters, square feet, acres, hectares, square kilometers, square miles, and more. Free online area converter for real estate, construction, and land measurement.

Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, kibibytes, mebibytes, and more. Free online data storage converter for IT, cloud computing, and file management.

Convert between cups, tablespoons, teaspoons, milliliters, fluid ounces, pints, quarts, gallons, and water-weight equivalents. Free online cooking converter for recipes and baking.

Calculate cubic meters (CBM) and dimensional weight for any shipment. Supports air (1:6000), sea (1:1000), and courier (1:5000) dim factors. Includes container fit estimates for 20ft and 40ft containers.

Convert oven temperatures between Celsius, Fahrenheit, and Gas Mark instantly. Includes common oven temperature terms and fan oven adjustments.

Format, validate, and beautify JSON data instantly. Paste messy JSON and get clean, indented output with syntax validation and error highlighting.

Test and debug regular expressions in real-time. Enter a pattern and test string to see matches, groups, and flags highlighted instantly.

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, and various date formats for developers.

Generate random UUID v4 and ULID identifiers instantly. Bulk generate multiple IDs, copy to clipboard, and choose between UUID and ULID formats.

Generate QR codes from any text or URL. Customize size and download as PNG images. Perfect for sharing links, WiFi credentials, or contact info.

Generate Lorem Ipsum placeholder text for your designs, mockups, and wireframes. Choose paragraph count, word count, or sentence count with one click.

Write markdown in a live editor and preview the rendered HTML in real-time. Supports headings, bold, italic, links, images, code blocks, lists, and tables.

Minify HTML, CSS, and JavaScript code for production use. Strips whitespace, comments, and unnecessary characters to reduce file sizes.

Build cron expressions visually with an intuitive interface. Select minutes, hours, days, months, and weekdays to generate valid cron syntax.

Compare two blocks of text or code side-by-side. See additions, deletions, and unchanged lines highlighted for quick visual comparison.

Convert text between camelCase, snake_case, kebab-case, PascalCase, Title Case, UPPER CASE, and lower case instantly.

Decode and inspect JSON Web Tokens (JWT) client-side. View the header, payload, and signature information without sending data to any server.

Encode and decode HTML entities instantly. Convert special characters to HTML entities and back between named, decimal, and hex entity formats.

Convert colors between HEX, RGB, and HSL formats instantly. Perfect for web designers and developers working with color codes.