Convert between every common length unit, metric and imperial, with exact definitions.
How it works
- Select your starting length unit and your target length unit.
- Input the distance value you wish to translate.
- The engine multiplies by the exact SI definition factor for the result.
Frequently asked questions
How many feet in a meter?
About 3.28084 — exactly 1 ÷ 0.3048.
Miles vs kilometers quick rule?
Multiply miles by 1.609. For a head estimate, add 60%.
Why is the inch exactly 2.54 cm?
By international agreement (1959), the inch is defined as exactly 25.4 mm.