Length Converter
Convert length units instantly: metre, kilometre, centimetre, millimetre, micrometre, nanometre and more. Precise factors, all units shown at once.
| Unit | Value |
|---|---|
| metre (m) | |
| kilometre (km) | |
| centimetre (cm) | |
| millimetre (mm) | |
| micrometre (µm) | |
| nanometre (nm) | |
| picometre (pm) | |
| ångström (Å) | |
| inch (in) | |
| foot (ft) | |
| yard (yd) | |
| mile (mi) | |
| nautical mile (nmi) | |
| thou (mil) (mil) | |
| furlong (fur) | |
| chain (ch) | |
| astronomical unit (au) | |
| light-year (ly) | |
| parsec (pc) |
Tip: double-click a row to convert from that unit. Click a value to copy it. Expressions like 3*12 are accepted.
How to use the Length Converter
- Type the value you want to convert (expressions are allowed).
- Choose the unit you are converting from.
- Read the result in every other unit in the table — it updates as you type.
About this tool
Enter a value and choose its unit; the length is converted to all 19 supported units simultaneously. Conversions use exact definitions where they exist (e.g. 1 inch = 25.4 mm, 1 lb = 0.453 592 37 kg).
Common conversions
| 1 m = 0.001 km | 1 km = 1000 m |
| 1 m = 100 cm | 1 cm = 0.01 m |
| 1 m = 1000 mm | 1 mm = 0.001 m |
| 1 m = 1 000 000 µm | 1 µm = 0.000001 m |
| 1 m = 1 000 000 000 nm | 1 nm = 1 × 10⁻⁹ m |
| 1 m = 1 × 10¹² pm | 1 pm = 1 × 10⁻¹² m |