Unit Converter
Convert length, mass, temperature, data, speed, area, volume, pressure, energy, power, force, frequency and angle units — metric and imperial, in your browser.
🔒 Converted in your browser — nothing is uploaded.
Convert between units
Pick a category — length, mass, temperature or data storage — enter a value, and choose the units to convert from and to. The result updates live and can be copied. Covers metric and imperial units and the common data sizes. Everything runs in your browser.
How the conversions work
Length and mass use exact conversion factors; data sizes use binary units (1 KB = 1024 bytes), which differ from the decimal units (1 KB = 1000 bytes) that some storage vendors and networks use. Temperature uses the proper Celsius/Fahrenheit/Kelvin formulas (not just a ratio), so 100°C correctly becomes 212°F.
Frequently asked questions
Which units are supported?
Length (mm–mi), mass (mg–lb), temperature (°C, °F, K) and data storage (B–TB), covering metric and imperial.
Are data sizes binary or decimal?
Data storage uses binary steps of 1024 (1 KB = 1024 B, 1 MB = 1024 KB), the convention most operating systems display.
Is anything uploaded?
No. All conversions run locally in your browser.