| Unit | Value |
|---|---|
| Meter (m) | 1 |
| Centimeter (cm) | 100 |
| Decimeter (dm) | 10 |
| Dekameter (dam) | 0.1 |
| Foot (ft) | 3.2808399 |
| Hectometer (hm) | 0.01 |
| Inch (in) | 39.370079 |
| Kilometer (km) | 0.001 |
| Mile (mi) | 0.00062137119 |
| Millimeter (mm) | 1000 |
| Micrometer (µm) | 1000000 |
| Nanometer (nm) | 1.0000000e+9 |
| Yard (yd) | 1.0936133 |
This converter uses a base-unit factor system where every length unit has a known ratio to the meter (the SI base unit). To convert, the input value is multiplied by its unit’s factor to get meters, then divided by the target unit’s factor.
All arithmetic is performed with arbitrary-precision BigNumber math, so you get accurate results even for very large or very small quantities like nanometers or miles.
Convert 100 feet to meters: 100 × 0.3048 = 30.48 m. The factor 0.3048 is exact because one foot is defined as precisely 0.3048 meters by international agreement.
One meter equals approximately 3.28084 feet. The meter is defined as the distance light travels in a vacuum in 1/299,792,458 of a second, while the foot is defined as exactly 0.3048 meters.
One mile equals exactly 1.609344 kilometers. Miles are used in the United States and United Kingdom for road distances, while kilometers are used in most other countries and in scientific work.
Multiply the number of inches by 2.54. This factor is exact by definition — one inch is defined as precisely 25.4 millimeters (2.54 centimeters).