Unit conversions
Quick converters for the unit pairs people actually look up — each with the formula, a worked example, a chart of common values, and an FAQ. Everything runs in your browser.
Length
- cm to inches — 1 cm = 0.393701 in
- inches to cm — 1 in = 2.54 cm
- mm to inches — 1 mm = 0.03937 in
- inches to mm — 1 in = 25.4 mm
- meters to feet — 1 m = 3.2808 ft
- feet to meters — 1 ft = 0.3048 m
- km to miles — 1 km = 0.621371 mi
- miles to km — 1 mi = 1.6093 km
- meters to yards — 1 m = 1.0936 yd
- yards to meters — 1 yd = 0.9144 m
- cm to feet — 1 cm = 0.032808 ft
- feet to cm — 1 ft = 30.48 cm
- inches to feet — 1 in = 0.083333 ft
- feet to inches — 1 ft = 12 in
- meters to km — 1 m = 0.001 km
- km to meters — 1 km = 1,000 m
Weight & mass
- kg to lbs — 1 kg = 2.2046 lb
- lbs to kg — 1 lb = 0.453592 kg
- grams to ounces — 1 g = 0.035274 oz
- ounces to grams — 1 oz = 28.3495 g
- kg to stone — 1 kg = 0.157473 st
- stone to kg — 1 st = 6.3503 kg
- stone to lbs — 1 st = 14 lb
- lbs to stone — 1 lb = 0.071429 st
Temperature
- Celsius to Fahrenheit — °F = °C × 9/5 + 32
- Fahrenheit to Celsius — °C = (°F − 32) × 5/9
Volume
- liters to gallons — 1 L = 0.264172 gal
- gallons to liters — 1 gal = 3.7854 L
- mL to fluid ounces — 1 mL = 0.033814 fl oz
- fluid ounces to mL — 1 fl oz = 29.5735 mL
- cups to mL — 1 cup = 236.59 mL
- mL to cups — 1 mL = 0.004227 cup
Speed
- mph to km/h — 1 mph = 1.6093 km/h
- km/h to mph — 1 km/h = 0.621371 mph
Need a pair that is not listed? The unit converter handles any combination of length, weight, and temperature units.