Calculators & converters
Percentages, BMI, loans, units, colours, dates — instant results.
Percentage CalculatorAnswer the four percentage questions people actually search for: what is X percent of Y, X is what percent of Y, increase or decrease by X percent.
Popular
BMI CalculatorWork out body mass index, see which band you fall in, and get the weight range that counts as healthy for your height.
Popular
Age CalculatorGet an exact age in years, months and days, plus total days lived, the next birthday, the weekday you were born on and the year you turn each milestone.
Date CalculatorCount the days between dates, add or subtract days and weekdays, and get the resulting calendar date with the weekday name.
Loan CalculatorEstimate the monthly payment on a personal loan or mortgage, the total interest paid, and how much of the first years goes to interest.
Discount CalculatorEnter the original price and the discount to see what you pay, what you save, and what the item costs if several offers stack.
Unit ConverterA single converter for the everyday units: metres and feet, kilograms and pounds, Celsius and Fahrenheit, litres, miles per hour, megabytes and more.
Popular
Colour ConverterMove between HEX, RGB, HSL and CSS names, check contrast against white and black, and get accessible shades automatically.
Calorie CalculatorEstimate basal metabolic rate with the Mifflin-St Jeor equation and the daily calories for maintaining, losing or gaining weight.
Timestamp ConverterConvert a Unix or millisecond timestamp into a readable local and UTC date, or turn a date into the number your API expects.
Random Number GeneratorPick a number in a range, roll dice, flip a coin, shuffle a list of names, or draw winners without repeats for a giveaway.
Shoe Size ConverterConvert shoe sizes between US, EU, UK and CN for men and women. Enter a size or foot length and see every system at once — free and instant.
RMB Uppercase ConverterConvert a number to the Chinese uppercase RMB amount used on cheques and invoices. Handles yuan, jiao and fen. Free, instant, no upload.
World ClockSee the live time in 12 world cities, compare time zones and plan a meeting across them, with business-hours highlights. Free, no sign-up.
Pomodoro TimerA Pomodoro timer for focused work: 25-minute sessions, short and long breaks, a session counter and an optional chime. Free, in-browser.
Random PickerSpin a wheel to pick a random name, or draw a winner instantly. Add one name per line, remove winners and pick a whole team. Free, no upload.