Length Converter
Convert between 9 length units — metric and imperial. Live update as you type.
Quick reference conversions
| From | To | Multiply by |
|---|---|---|
| 1 inch | centimetres | 2.54 |
| 1 foot | centimetres | 30.48 |
| 1 yard | metres | 0.9144 |
| 1 mile | kilometres | 1.609344 |
| 1 km | miles | 0.621371 |
| 1 nautical mile | kilometres | 1.852 |
Frequently asked questions
How many centimetres are in an inch?
Exactly 2.54 centimetres. This is an exact defined value — the inch was officially redefined in 1959 as exactly 25.4 millimetres as part of the International Yard and Pound Agreement.
What is a nautical mile?
A nautical mile is exactly 1,852 metres, defined as the average length of one minute of arc of latitude along any meridian. It is used in maritime and air navigation because one nautical mile corresponds to one arcminute on the Earth's surface, making position calculations straightforward.
