Unit converters
Unit converters built on exact definitions rather than rounded rules of thumb. Each converter has a reference table for the values people look up most, and a note on the units that cause confusion.
Unit conversion
- Length ConverterConvert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
- Weight ConverterConvert kilograms, grams, pounds, ounces, stone and tonnes.
- Temperature ConverterConvert between Celsius, Fahrenheit and Kelvin.
- Area ConverterConvert square meters, square feet, acres, hectares, square miles and more.
- Volume ConverterConvert liters, milliliters, US gallons, imperial gallons, quarts, pints, cups and cubic units.
- Speed ConverterConvert km/h, mph, m/s, knots and feet per second.
- Time ConverterConvert seconds, minutes, hours, days, weeks, months and years.
- Data Storage ConverterConvert bits, bytes, KB, MB, GB, TB and the binary units KiB, MiB, GiB and TiB.
- Cooking Unit ConverterConvert teaspoons, tablespoons, cups, fluid ounces, pints, quarts and milliliters.
Guides to go with these tools
All guides- Guide · September 19, 2026How to Convert Celsius to Fahrenheit (and Back)
- Guide · September 19, 2026How to Convert Units Step by Step
- Article · September 19, 2026Kilobytes vs Kibibytes: Why a 1 TB Drive Shows Less
- Article · September 19, 2026Metric vs Imperial vs US Customary: Why There Are Two Systems