Unit Converter
Free online unit converter for length, weight, temperature, volume, area, speed, data and time. Convert between metric and imperial units instantly and accurately.
All-in-one unit converter
Convert between metric and imperial units across length, weight, temperature, volume, area, speed and digital storage. Choose a category, set your value, and the result updates instantly. Common conversions like centimeters to inches, kilograms to pounds and Celsius to Fahrenheit are all built in.
Frequently asked questions
Which units can I convert?
Length, weight/mass, temperature, volume, area, speed and digital storage — including metric and imperial (US) units. Pick a category, then the units.
How accurate are the conversions?
Conversions use exact standard factors (and the proper formulas for temperature), rounded only for display, so results are accurate for everyday and most technical use.
Does it work offline / privately?
Yes. All math runs in your browser with no network calls, so it keeps working offline and never sends your data anywhere.