Calculators & Converters
Units, dates, numbers, passwords, QR codes and everyday maths.
Age Calculator
Find your exact age in years, months and days.
Area Converter
Convert square feet, square metres, acres, hectares and more.
Average Calculator
Find the mean, median, mode and range of numbers.
Barcode Generator
Create a Code 128 barcode image.
BMI Calculator
Work out your Body Mass Index from height and weight.
Coin Flip
Flip a coin — heads or tails.
Countdown Timer
Count down from any time with an alarm.
Data Storage Converter
Convert bytes, KB, MB, GB and TB.
Date Difference Calculator
Count the days, weeks and months between two dates.
Dice Roller
Roll one or more dice online.
Free Online Screen Recorder (No Watermark)
Record screen, browser tabs, or application windows with microphone audio directly in your browser without software.
Length Converter
Convert mm, cm, m, km, inches, feet, yards and miles.
Number to Words
Write any number in English words.
Online Digital Signature Maker
Draw and generate transparent digital signatures with custom ink colors and instant PNG download for legal forms and PDFs.
Online Stopwatch
A simple stopwatch with lap times.
Online Voice & Audio Recorder
Record voice notes and microphone audio directly in the browser with live duration timer and instant download.
Password Generator
Create strong random passwords.
Password Strength Checker
See how strong a password is and how long it would take to crack.
Percentage Calculator
Work out percentages, increases and decreases.
Power Converter
Convert watts, kilowatts, horsepower and BTU/h.
Pressure Converter
Convert bar, psi, pascal, atm and mmHg.
QR Code Generator
Make a QR code for a link, text, Wi-Fi or contact.
Random Name Picker
Pick a random winner from a list of names.
Random Number Generator
Pick random numbers in any range.
Roman Numerals Converter
Convert numbers to Roman numerals and back.
Speed Converter
Convert km/h, mph, m/s and knots.
Standard Deviation Calculator
Find standard deviation and variance of numbers, step by step.
Temperature Converter
Convert Celsius, Fahrenheit and Kelvin.
Time Zone Converter
Convert a time between cities and time zones.
Typing Speed Test (1 Minute WPM)
Test your words per minute (WPM), accuracy, and typing speed with real-time feedback and certification timer.
Unit Converter
Convert length, weight, area, volume and speed.
Volume Converter
Convert litres, millilitres, gallons, cups and more.
Weight Converter
Convert mg, g, kg, tonnes, ounces, pounds and stone.
Wheel of Names (Random Picker Wheel)
Spin a customizable roulette wheel for giveaways, classroom decision making, raffles, and random winner selection.