Length Converter
Choose any two units and type in either box — the conversion works in both directions as you type.
100 cm = 39.3700787402 in
How length units relate
All of these units are defined in terms of the meter. Since the international yard and pound agreement of 1959, the inch is exactly 2.54 cm, the foot exactly 0.3048 m, the yard 0.9144 m and the mile 1,609.344 m, so conversions between them are exact.
Quick estimates
- 1 inch ≈ 2.5 cm; 1 foot ≈ 30 cm; 1 meter ≈ 3.3 feet.
- 1 mile ≈ 1.6 km; 1 km ≈ 0.62 miles.
- A yard is a little shorter than a meter (about 91%).
Units in meters
| Unit | In meters |
|---|---|
| 1 millimeter (mm) | 0.001 m |
| 1 centimeter (cm) | 0.01 m |
| 1 kilometer (km) | 1,000 m |
| 1 inch (in) | 0.0254 m |
| 1 foot (ft) | 0.3048 m |
| 1 yard (yd) | 0.9144 m |
| 1 mile (mi) | 1,609.344 m |
| 1 nautical mile (nmi) | 1,852 m |
Popular length conversions
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