Everyday Utilities

Calculate your exact age in years, months and days — plus total weeks, hours and your next birthday.

Find the number of days, weeks, weekdays and weekend days between any two dates.

Work out percentages three ways: X% of Y, X is what % of Y, and percentage change.

Convert length, weight, temperature, volume, area, speed and data units instantly.

Flip a virtual coin for a fair heads-or-tails decision, with a running tally.

Roll 1–20 dice with 4 to 100 sides and get an instant total — great for tabletop games.

Generate random numbers in any range, with optional no-repeats for draws and lotteries.

Pick a random winner from a list of names — perfect for giveaways and classrooms.

Split a list of people into balanced random teams by team count or team size.

Spin a colorful wheel of fortune to randomly pick one of your options.

Set a countdown timer for any duration with pause, resume and a time's-up alert.

An online stopwatch with lap times, accurate to a hundredth of a second.

Generate a clean, printable monthly calendar for any month and year.

Create barcodes in CODE128, EAN, UPC and more formats, and download as SVG.

Scan QR codes with your camera or from an image, right in the browser.

Test a password's strength, entropy and estimated time to crack — privately.

Spell any text in the NATO phonetic alphabet (Alfa, Bravo, Charlie…).

A focus timer with work/break cycles, custom lengths and a chime.

A full scientific calculator with trig, logs, powers and constants.

Calculate the hours and minutes between two times, including overnight.

Add up weekly work hours with breaks and calculate your pay.

A simple, private to-do list that saves in your browser and works offline.

Find what day of the week any date falls on — past or future.

Check if any year is a leap year, with the previous and next leap years.

Find your Western star sign and Chinese zodiac animal from your birth date.

Convert length and distance between metric and imperial units — cm, m, km, inches, feet, miles.

Convert weight and mass between kg, grams, pounds, ounces, stone and tonnes.

Convert temperature between Celsius, Fahrenheit and Kelvin.

Convert area between square meters, square feet, acres, hectares and more.

Convert volume between liters, milliliters, gallons, cups, pints and more.

Convert speed between km/h, mph, m/s, knots and feet per second.

Convert time between seconds, minutes, hours, days, weeks, months and years.

Convert digital storage between bytes, KB, MB, GB, TB and binary units (KiB, MiB, GiB).

Convert pressure between pascals, bar, psi, atmospheres and mmHg.

Convert energy between joules, calories, kWh, BTU and more.

Convert power between watts, kilowatts, horsepower and BTU/hour.

Convert angles between degrees, radians, gradians and more.

Convert data transfer speed between bps, Mbps, Gbps and MB/s.

Convert frequency between hertz, kHz, MHz, GHz and RPM.