Everyday Calculators
36 tools, each with formula and worked examples
Age, percentage, tip, word count, and everyday utility tools.
Misc· 17
Wind Chill
Calculate the wind chill feels-like temperature using the official NWS formula. Includes frostbite risk timeli…
Heat Index
Calculate the heat index feels-like temperature using the official NOAA formula. Includes OSHA danger tiers, h…
Dew Point Calculator
Calculate the dew point from temperature and relative humidity using the Magnus formula. Free online calculato…
Love Calculator
Discover your compatibility score with a fun, deterministic love algorithm. Includes zodiac compatibility insi…
Shoe Size Converter
Convert shoe sizes across US, UK, EU, and Japan/CM systems with mens and womens sizing and smart interpolation…
Bra Size Calculator
Find your correct bra size using the modern 6-measurement method (underbust loose/snug/tight, bust standing/le…
Sleep Cycle Calculator
Calculate your optimal bedtime or wake-up time using 90-minute sleep cycles and sleep onset latency. Free, ins…
Golf Handicap
Calculate your World Handicap System (WHS) index from recent rounds. Supports 5 to 20 rounds with proper diffe…
Word Count
Count words, characters, sentences, and paragraphs in any text. Estimates reading and speaking time with Flesc…
BPM Tapper
Convert BPM to delay times in milliseconds for any note value (whole, half, quarter, eighth, sixteenth, dotted…
Wedding Alcohol
Calculate exactly how much beer, wine, and liquor to buy for your wedding or party. Based on guest count, drin…
Typing Test
Calculate your net and gross typing speed in WPM. Paste your source text and what you typed to get accuracy pe…
Odds Converter
Convert betting odds between American, Decimal, and Fractional formats. See the implied probability, payout, a…
Depth of Field
Calculate depth of field for any camera setup with 7 sensor formats. Enter sensor size, focal length, aperture…
Yarn Yardage
Estimate yarn yardage for scarves, blankets, sweaters, and hats. Adjusts for gauge, yarn weight, and includes …
Numerology
Calculate your Life Path number from your birth date with detailed personality profiles for numbers 1-9 and ma…
Gestation Period
Look up gestation periods for 34 animals from elephant to opossum. Calculate due dates from breeding dates for…
Gaming· 3
Dice Roller
Roll virtual dice from D4 to D20 with modifiers. Uses cryptographically secure random values. Free, instant, a…
eDPI Calculator
Calculate your effective dots per inch (eDPI) from DPI and in-game sensitivity for popular FPS games. Free, in…
Robux Converter
Convert Robux, V-Bucks, and Roblox Premium to USD using official package pricing. Find the best-value package …
Shopping & Discounts· 4
Clothing Sizes
Convert clothing sizes between US, UK, EU, and Japanese sizing for dresses, shirts, shoes, and more. Includes …
Percent Off Calculator
Calculate the true final price after stacked discounts and local sales tax. See why "20% off plus an extra 10%…
Percentage
Calculate percentages for tips, discounts, sales tax, and percent change. Five modes: find percent of number, …
Tip Splitter
Calculate and split a restaurant tip among multiple people. Choose 10-30% tip, see per-person breakdown with p…
Time & Date· 5
Countdown Calculator — Days Until
Calculate the exact time remaining until any date. See days, weeks, months, and hours until your next event, b…
Age Calculator
Find exact age in years, months, and days between dates. Shows total days, weeks, months, and hours lived plus…
Study Time
Calculate how many study hours you need based on material volume and deadline. Plan your weekly schedule and a…
Working Days
Count the exact number of working days (business days) between two dates, excluding weekends and US federal ho…
Reading Time
Estimate how long it takes to read any text based on word count, reading speed, and content type. Includes bre…
Astronomy· 2
Conversions· 4
Pixels to Inches
Convert pixels to inches at any DPI/PPI with presets for web, screen, draft, and print. Shows print size in in…
Aspect Ratio
Calculate the aspect ratio from any width and height. Identify common presets (16:9, 4:3, 1:1, 3:2, 21:9, 9:16…
Oven Temperature Converter — °F,
Convert oven temperatures between Fahrenheit, Celsius, and Gas Mark. Includes a cooking temperature reference …
Recipe Scaler
Scale any recipe up or down by changing the serving size. Enter ingredients with fractions like "1 1/2 cups" a…