The tools you reach for constantly — age and date calculators, timers, unit conversion, to-do lists, and more.
Find your exact age in years, months, and days from a date of birth.
Calculate Body Mass Index from height and weight, metric or imperial.
Count working days between two dates, or add working days to a date.
Find the day of week, week number, and leap year status for any date.
Set a timer in minutes and seconds with a sound alert at zero.
Find exactly how many days, months, or years lie between two dates.
Estimate download or upload time from file size and connection speed.
Convert land area between acres, hectares, bigha, guntha, and more.
Estimate how much paint you need for a room.
Find a percentage of a number, percentage change, and percentage difference.
Start, pause, and record laps, accurate to the hundredth of a second.
Convert a date and time between any two time zones.
Convert a Unix timestamp to a date, or a date to a timestamp.
A simple task list that saves automatically in your browser.
Length, weight, and temperature conversions with instant results.
This group collects practical utilities for daily life: an age calculator, date difference and business-day counters, time zone and timestamp converters, countdown timer and stopwatch, unit converter, land area converter, percentage calculator, BMI calculator, paint calculator, download time estimator and a simple to-do list.
Most of them answer a question you could work out by hand but would rather not, such as how many working days remain before a deadline, what 15 percent of a bill is, or how many litres of paint a room needs. Each tool explains its assumptions, such as whether a count includes the start date.