Unit, number and time converters
Units, numbers and time, each with its working shown
Pick a converter below. Each one runs in your browser, opens with a worked example, and shows how the answer is reached. No sign-up and nothing you type is sent anywhere.
Unit converters
Every common unit of each kind, metric and US or imperial, side by side.
Unit converter
Length, weight, temperature, cooking, area, speed, data, energy and power.
Length converter
Millimeters to miles, with every unit side by side.
Weight converter
Kilograms, pounds, stone, ounces and tons.
Temperature converter
Celsius, Fahrenheit and Kelvin, with the formula.
Volume and cooking converter
Cups, spoons, fl oz, pints and gallons, US and imperial.
Area converter
Square feet, square meters, acres and hectares.
Number converters
Roman numerals, number bases and numbers in words, with the working shown.
Popular conversions
One pair each, both ways, with a chart: the conversions people look up most.
Time converters
Switch between military and 12-hour time, and between hours and minutes and decimal hours.