Length & Distance Converter
Instantly convert length and distance measurements between metric and imperial units with high precision.
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About Length Units
Length is a measure of distance. In the International System of Units (SI), the base unit of length is the meter. Different regions and industries use various units, broadly categorized into the metric and imperial systems.
Metric System (m, cm, km)
The metric system is globally adopted and based on powers of 10. The base unit is the meter (m). A centimeter (cm) is 1/100 of a meter, a millimeter (mm) is 1/1000, and a kilometer (km) is 1000 meters, typically used for measuring geographic distances.
Imperial & US Customary System (in, ft, mi)
Used primarily in the United States, the UK, and aviation. An inch (in) is exactly 25.4 mm. A foot (ft) is 12 inches. Interestingly, there is a slight difference between the standard International Foot and the US Survey Foot (ft-us), which is crucial in precise geodetic surveying. A mile (mi) equals 5,280 standard feet.