All conversions
| Unit | Value | Copy |
|---|---|---|
| Nanometre (nm) | — | |
| Micrometre (µm) | — | |
| Millimetre (mm) | — | |
| Centimetre (cm) | — | |
| Metre (m) | — | |
| Kilometre (km) | — | |
| Inch (in) | — | |
| Foot (ft) | — | |
| Yard (yd) | — | |
| Mile (mi) | — | |
| Nautical mile (nmi) | — |
Convert any length or distance between metric and imperial units. Type in either field and every other unit is shown in the table below.
How to use the Length Converter
- 1 Type a value in either box — the conversion works in both directions.
- 2 Choose the units to convert length from and to, or click any row in the table.
- 3 Use the swap button to reverse the conversion, then copy the result.
Formula
1 inch = 2.54 cm (exact) 1 foot = 12 in = 0.3048 m 1 yard = 3 ft = 0.9144 m 1 mile = 1,760 yd = 1,609.344 m
Worked examples
Input: 6 feet
Result: 1.8288 m
Input: 10 km
Result: 6.2137 miles
Metric and imperial definitions
Since the 1959 international yard and pound agreement, imperial lengths are defined exactly in metric terms: one inch is exactly 25.4 millimetres. That means conversions from inches, feet, yards and miles to metres are exact, not approximations.
Quick reference
| From | To |
|---|---|
| 1 cm | 0.3937 in |
| 1 m | 3.2808 ft |
| 1 km | 0.6214 mi |
| 1 mi | 1.6093 km |
| 1 nautical mile | 1,852 m |
Frequently asked questions
How many centimetres are in an inch?
Exactly 2.54 cm.
How many feet are in a metre?
About 3.28084 feet.
What is a nautical mile?
Exactly 1,852 metres — used in aviation and shipping because it relates to one minute of latitude.
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