Unit Converter
Convert between units across 7 categories: length, weight, temperature, area, volume, speed, and digital data. Results update instantly as you type.
Common Conversion Reference
Length: 1 inch = 2.54 cm | 1 mile = 1.609 km | 1 foot = 0.3048 m
Weight: 1 lb = 0.454 kg | 1 stone = 6.35 kg | 1 oz = 28.35 g
Temp: °C = (°F − 32) × 5/9 | °F = °C × 9/5 + 32
Volume: 1 US cup = 236.6 ml | 1 UK gal = 4.546 L | 1 US gal = 3.785 L
Temperature Landmarks
| Point | °C | °F | K |
|---|---|---|---|
| Absolute zero | -273.15 | -459.67 | 0 |
| Water freezes | 0 | 32 | 273.15 |
| Body temp | 37 | 98.6 | 310.15 |
| Water boils | 100 | 212 | 373.15 |
How to use
Using the converter
Select a category, choose the source and target units from the dropdowns, then type a value. The converted result appears immediately below.
Temperature
Temperature conversions are non-linear (unlike other categories which use simple ratios). Celsius, Fahrenheit, and Kelvin are all supported. 0°C = 32°F = 273.15K.
Digital data
Conversions follow binary prefixes: 1 KB = 1024 bytes, 1 MB = 1024 KB, etc.
Tips
- •A quick reference: 1 inch = 2.54 cm, 1 mile = 1.609 km, 1 kg = 2.205 lbs.
- •For cooking: 1 US cup = 236.6 ml, 1 US fl oz = 29.57 ml.
- •Body temperature is 37°C = 98.6°F. Water boils at 100°C = 212°F.