Unit Converter
Convert between metric and imperial units across length, weight, area, volume, speed and digital storage, with results updating as you type.
How to use the Unit Converter
- Pick a category such as length, weight or volume.
- Choose the unit you are converting from and to.
- Enter a value and read the converted result.
About the Unit Converter
Rather than a separate page per pair of units, this covers whole categories, so you can go from square feet to square metres and then to acres without changing tools. Conversion factors are exact where an exact definition exists — an inch is precisely 25.4 mm — and rounding is applied only for display, so chained conversions do not drift.
Frequently asked questions
Which unit categories are supported?
Length, weight and mass, area, volume, speed and digital data storage.
How accurate are the conversions?
They use exact defined factors where one exists, with rounding applied only when the result is displayed.
Can I convert digital storage units?
Yes — bytes through terabytes, useful for checking file sizes and bandwidth.
Why does a conversion give such a long decimal?
Because most unit relationships are not round numbers — a kilogram is 2.20462262... pounds, and an inch is exactly 2.54 centimetres by definition. The extra digits are shown so you can round to whatever precision your task needs rather than being rounded for you.
Related free tools
- Temperature Converter — Celsius ⇄ Fahrenheit ⇄ Kelvin, live.
- Currency Converter — Live exchange rates for 160+ world currencies, updated daily.
- Number to Words — Spell out any number up to trillions.
- Roman Numeral Converter — Numbers ⇄ Roman numerals (1–3999).
- Binary / Hex / Text — Convert text ⇄ binary ⇄ hex ⇄ decimal.
- Morse Code Translator — Text ⇄ Morse code with playback.
Runs entirely in your browser — nothing you enter is uploaded. Last reviewed and updated .