Unit Converter (Length, Weight, Temperature, Volume)
Convert between 100+ units across length, weight, temperature, volume, area, speed, time and data — instantly.
100% free
No sign-up
Private · runs in your browser
How to use the free online unit converter
- Pick a category (e.g. Length).
- Choose the source and target units.
- Type a value — the result updates instantly.
- Swap the units with one click if needed.
About this tool
Convert between length, weight, temperature, data, time, area and speed units instantly — meters to feet, kg to pounds, Celsius to Fahrenheit, gigabytes to megabytes and more. With live conversion as you type, reverse swaps, and exact rates for every common unit. Free, offline, unlimited.
Key features
- 8 measurement categories
- 100+ units
- Precision control
- Instant conversion
Privacy first: every calculation and generation runs 100% locally in your web browser using the Web Crypto API. Your input never touches a server — nothing is stored, logged or sold.
Frequently asked questions
Length (meters, feet, inches, miles…), weight, temperature, volume, area, speed, time and digital storage — over 100 units in total.
All conversions use exact SI definitions. For imperial↔metric (like pounds↔kg) results are rounded to up to 8 decimal places.
Yes — every conversion runs in your browser, so it works even without internet.
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