Unit Converter
Convert between units of length, weight, temperature, data storage, area, speed, time, and volume.
Runs entirely in your browser.
Measurement Conversion Tool
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1 Millimeter = 0.1 Centimeter
About Unit Conversion
Unit conversion changes a measurement from one unit to another while keeping the same physical quantity. Most conversions are ratio-based: each unit is defined relative to a base unit, so converting means multiplying and dividing by known factors.
Temperature is the exception. Celsius, Fahrenheit, and Kelvin do not share a common zero point, so they require addition and subtraction in their formulas rather than a simple ratio. This tool handles temperature with the correct formulas and all other categories with precise conversion factors.
Single-Unit Converters
Each category also has its own page, if you only need one kind of conversion:
- Length Converter — mm, cm, m, km, inches, feet, yards, miles
- Weight Converter — mg, g, kg, tons, ounces, pounds, stone
- Temperature Converter — Celsius, Fahrenheit, Kelvin
- Data Storage Converter — bits, bytes, KB, MB, GB, TB, PB
- Area Converter — square meters, square feet, hectares, acres
- Speed Converter — m/s, km/h, mph, ft/s, knots
- Time Converter — seconds, minutes, hours, days, weeks
- Volume Converter — ml, liters, cups, pints, quarts, gallons
