Length Converter
Convert between metric, imperial and scientific length units.
Runs in your browser Your input never leaves your device.
About this tool
Enter a number, choose the unit to convert from and the unit to convert to, and the result updates as you type. The list has 24 units: metric from millimeter to gigameter, imperial and US units such as inch, foot, yard, mile, fathom, chain, furlong and league, plus nautical mile, light year, parsec, angstrom, micron, thou and barleycorn. Each conversion goes through meters using fixed factors, and the result is labeled with the target unit symbol and shows up to 8 decimal places, switching to scientific notation for extremely small or large values. The mile uses the exact 1,609.344 meters, but the league, light year and parsec factors are rounded. Swap flips the two units, and Copy copies the result.
How to use it
- Type the value to convert.
- Choose the From unit and the To unit.
- Read the result, shown with the target unit symbol.
- Use Swap to reverse, or Copy to copy the result.
Example
1 foot to meter
0.3048 m
Common problems
- The result shows long decimals or e-notation
- Results show up to 8 decimals and use exponent notation for very small or large numbers.
- The result shows a dash
- The input is empty or not a number. Enter digits only, with a decimal point rather than a comma.