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