Length
Metres, feet, miles, inches and nautical miles.
About Length
Convert a length between millimetres, centimetres, metres, kilometres, inches, feet, yards, miles and nautical miles, all shown at once as you type.
How to use
- Type a value and pick its unit.
- Every other unit updates as you type; each row has its own Copy button, and Copy on the panel copies the whole table.
- Results are rounded to eight decimal places and formatted for your locale.
Conversion factors
All units convert through metres:
| Unit | Metres |
|---|---|
| inch | 0.0254 |
| foot | 0.3048 |
| yard | 0.9144 |
| mile | 1609.344 |
| nautical mile | 1852 |
These are the exact international definitions (the inch has been defined as 25.4 mm since 1959), so chained conversions do not drift.
Example
5 km → 3.10686 mi · 16 404.2 ft · 5 000 m · 2.69978 nmi
Frequently asked questions
- How many feet are in a mile?
- Exactly 5,280 feet. A mile is defined as 1,609.344 metres and a foot as 0.3048 metres.
- What is the difference between a mile and a nautical mile?
- A nautical mile is 1,852 metres, about 15% longer than a statute mile (1,609.344 m). It is based on one minute of latitude and is used at sea and in aviation.
- How do I convert centimetres to inches?
- Divide by 2.54. One inch is exactly 2.54 centimetres, so 100 cm is 39.37 inches.