Converters
Units, currencies, numbers and time zones.
Unit Converter
Convert between metric and imperial units for length, weight, temperature, speed, area, volume and data - all in one fast converter.
Length Converter
Convert lengths instantly: centimeters to inches, feet to meters, miles to kilometers and every other combination, with a handy reference table.
Weight Converter
Convert weight between kilograms, pounds, stone, ounces and grams. Includes the kg-to-lbs quick table and stone-and-pounds format.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin instantly, with the formula shown and a reference table of common temperatures.
Speed Converter
Convert speed between miles per hour, kilometers per hour, meters per second and knots - with running and cycling pace equivalents.
Area Converter
Convert area between square meters, square feet, acres, hectares and square kilometers. Useful for property, land and DIY.
Volume Converter
Convert volume between liters, US and UK gallons, cups, pints, fluid ounces and milliliters. Includes cooking measurement quick reference.
Data Size Converter
Convert between bits, bytes, KB, MB, GB and TB in both decimal (1000) and binary (1024) standards - and see why they differ.
Currency Converter
Convert between 30+ major currencies using daily exchange rates from the European Central Bank. Fast, free and no sign-up.
Roman Numerals
Convert numbers to Roman numerals and Roman numerals back to numbers, with a breakdown of how each numeral is built.
Number to Words
Convert any number into written English words - great for cheques, legal documents and invoices. Supports decimals and currency format.
Binary Converter
Convert numbers between binary, decimal, hexadecimal and octal, plus text to binary and back. Every base updates live as you type.
Time Zone Converter
Convert a time between any two time zones and compare multiple cities at once. Handles daylight saving automatically.
Military Time
Convert military (24-hour) time to regular 12-hour AM/PM time and back instantly, with the full 24-hour reference chart and how to say each time aloud.
Popular quick conversions
22 pageskg to lbs
One kilogram is exactly 2.
lbs to kg
One pound is exactly 0.
cm to in
An inch is defined as exactly 2.
in to cm
Multiply inches by exactly 2.
ft to m
One foot is exactly 0.
m to ft
A meter is about 3.
mi to km
One mile is exactly 1.
km to mi
A kilometer is about 0.
°C to °F
Multiply by 9/5 (or 1.
°F to °C
Subtract 32, then multiply by 5/9.
g to oz
There are about 28.
oz to g
One ounce is exactly 28.
ml to fl oz
A US fluid ounce is 29.
fl oz to ml
Multiply US fluid ounces by 29.
L to gal
A US gallon is 3.
gal to L
One US gallon is exactly 3.
st to kg
One stone is exactly 6.
kg to st
Divide kilograms by 6.
mm to in
There are exactly 25.
in to mm
Multiply inches by exactly 25.
mph to km/h
Multiply miles per hour by 1.
km/h to mph
Multiply km/h by 0.