Length Converter
Convert between metres, feet, inches, miles and eleven other units.
| Nanometrenm | 1,000,000,000 | |
| Millimetremm | 1,000 | |
| Centimetrecm | 100 | |
| Metrem | 1 | |
| Kilometrekm | 0.001 | |
| Inchin | 39.3701 | |
| Footft | 3.2808 | |
| Yardyd | 1.0936 | |
| Milemi | 0.0006 | |
| Nautical milenmi | 0.0005 | |
| Light yearly | 1.0570e-16 |
All conversions go through the metre using exact internationally agreed factors; only the display is rounded.
About Length Converter
Length is the unit family people convert most often, and the metric and imperial systems have coexisted long enough that mixing them is a daily reality in engineering and construction.
This converter shows your value in every supported unit at once, from nanometres to nautical miles, with exact conversion factors and adjustable precision.
Frequently asked questions
How exact are the conversions?
They use the internationally agreed definitions - one inch is exactly 25.4 millimetres - so the only error is display rounding.
What is a nautical mile?
Exactly 1852 metres, defined as one minute of latitude, and used in marine and air navigation.
Can I convert several units at once?
Yes. Enter one value and every supported unit updates simultaneously.