Utility Tools

Calculate exact age in years, months, and days from a date of birth, as of today or any date you choose. Free, instant, private.

Convert between square meters, square feet, acres, hectares, and other area units instantly. Free, accurate, browser-based.

Calculate the mean, median, mode, min, max, and sum of a list of numbers. Free statistics calculator, runs in your browser.

Convert between bits, bytes, KB, MB, GB, TB, and their binary (KiB/MiB/GiB) equivalents instantly. Free, accurate, browser-based.

Add or subtract days, weeks, months, or years from a date and get the resulting calendar date, including the day of the week.

Find the exact number of days, weeks, and business days between two dates. Free calendar calculator, runs entirely in your browser.

Add, subtract, multiply, or divide two fractions and get the result simplified to lowest terms, plus its decimal equivalent.

Convert between kilometers, meters, miles, feet, inches, and other length units instantly. Free, accurate, runs in your browser.

A browser-based checklist tool with categories, drag-to-reorder, and a progress indicator — sign in only if you want a list backed up to your account or exported as PDF/Excel.

Convert a number into its written-out English words, in international (million/billion) or Indian (lakh/crore) numbering.

Generate one or more random numbers within a range, with or without duplicates. Free, uses your browser's cryptographic RNG.

Simplify a ratio to its lowest terms, or solve for a missing value in a proportion like A:B = C:?. Free and instant.

Set a reminder for a specific date and time and get a real browser notification when it's due — works even if you've closed the tab.

Convert numbers to Roman numerals or Roman numerals back to numbers, for values from 1 to 3999. Free, instant, browser-based.

Convert between km/h, mph, m/s, and knots instantly. Free speed and velocity converter, runs entirely in your browser.

A browser-based to-do list with priority, due dates, tags, and recurring tasks — sign in only if you want your tasks backed up to your account.

Convert between Celsius, Fahrenheit, and Kelvin instantly. Free temperature converter that runs entirely in your browser.

Calculate the exact duration between two date-and-time values, broken down into days, hours, and minutes.

Convert a date and time from one time zone to another, using each zone's current UTC offset. Free, instant, runs in your browser.

Convert between length, weight, area, volume, speed, data storage, and temperature units, all from one page. Free and instant.

Convert between liters, milliliters, gallons, cups, and other volume units instantly. Free, accurate, runs entirely in your browser.

Convert between kilograms, grams, pounds, ounces, and other weight units instantly. Free, accurate, runs entirely in your browser.

Convert written-out English number words back into digits — supports both international and Indian (lakh/crore) numbering.