Length Converter
Instantly convert distances and dimensions between metric SI units and US customary / imperial standards. Uses official international conversion factors without intermediate floating-point rounding.
1 m = 3.28084 ft
1 m = 3.28084 ft
Common Conversions
1 m =0.001 km
1 m =100 cm
1 m =1,000 mm
1 m =1,000,000 µm
1 m =1,000,000,000 nm
How the Length Conversion Works
All length conversions are calculated using the International System of Units (SI) base unit of the meter (m). When converting from any unit A to unit B, the input is converted to meters via its exact defined factor, and then projected into the destination unit:
DestinationValue = (SourceValue × FactorToBase) ÷ FactorOfTarget
Exact Conversion Factors
| Unit | Symbol | System | Exact Definition in Meters |
|---|---|---|---|
| Inch | in | Imperial / US | 0.0254 m |
| Foot | ft | Imperial / US | 0.3048 m |
| Yard | yd | Imperial / US | 0.9144 m |
| Mile | mi | Imperial / US | 1,609.344 m |
| Nautical Mile | NM | Maritime / Navigation | 1,852 m |
| Centimeter | cm | Metric SI | 0.01 m |
| Kilometer | km | Metric SI | 1,000 m |
Common Worked Examples
Example 1: Converting 5 Miles to Kilometers
1 mile = 1,609.344 meters.
5 × 1,609.344 = 8,046.72 meters.
8,046.72 ÷ 1,000 = 8.04672 km.
Example 2: Converting 100 Centimeters to Inches
1 inch = 2.54 centimeters.
100 ÷ 2.54 = 39.3701 inches.