Unit Converter
Convert length, weight, temperature, area, volume, speed and data size in one place.
Free · No sign-up · Runs locally in your browser · Also available in Chinese (中文)
What is Unit Converter?
A unit converter turns a measurement from one unit into its exact equivalent in another — meters to feet, kilograms to pounds, Celsius to Fahrenheit, gigabytes to megabytes. This tool groups the most common conversion families in a single page so you never have to memorize a conversion factor again.
Every conversion is computed locally with precise international definitions (for example, 1 inch is exactly 2.54 cm by international agreement since 1959), so results are not approximations pulled from a lookup table. The tool runs entirely in your browser: no account, no upload, no waiting.
How to use it
- 1Pick a conversion family such as length, weight, temperature or data size.
- 2Type the value you want to convert in the source field.
- 3Choose the source unit and the target unit from the two dropdowns.
- 4Read the converted result instantly; swap the units to reverse the direction.
Common use cases
- Reading a US recipe that lists ounces and Fahrenheit while you cook with grams and Celsius.
- Checking whether a piece of furniture listed in inches will fit a space you measured in centimeters.
- Converting download sizes and transfer speeds between megabytes, gigabytes and megabits.
Frequently asked questions
▸How accurate are the conversions?
All factors come from official SI and international definitions, so results are exact to the precision shown. Temperature conversions use the exact formulas, not rounded shortcuts.
▸Does it work offline?
Yes. After the page has loaded, conversions keep working even if you lose connectivity, because every calculation happens in your browser.