Kilometers per Hour to Miles per Hour Converter

How to convert Kilometers per Hour to Miles per Hour

To convert Kilometers per Hour to Miles per Hour, multiply the value in Kilometers per Hour by 0.62137274. For example, 5 km/h = 3.1068637 mph.

Going from Kilometers per Hour to Miles per Hour means applying a fixed conversion factor: one Kilometers per Hour (km/h) is exactly 0.62137274 Miles per Hour (mph). Type any number into the converter above and the equivalent updates instantly, or use the reference table for quick lookups.

Speed conversions are used in driving, sports, aviation, weather, and physics. The most common need is converting between kilometers per hour and miles per hour when traveling between countries.

Understanding Kilometers per Hour and Miles per Hour

Most of the world posts speed limits in kilometers per hour, while the US and UK use miles per hour. Meters per second is the scientific standard, and knots (nautical miles per hour) are used in aviation and maritime navigation. A car at 100 km/h is traveling about 62 mph — a conversion worth knowing for any international driver.

How accurate is this conversion?

Speed conversions are exact because they derive directly from exact length and time definitions. Since 1 mile = 1.609344 kilometers exactly, all speed conversions between these units are precise.

All conversion factors on ClearUnits are based on internationally recognised standards (the International System of Units, SI, and official definitions). Factors are reviewed for accuracy and the calculator uses full-precision values, rounding only the displayed result.

Quick reference: common Kilometers per Hour to Miles per Hour values

The most frequently searched conversions are 1 Kilometers per Hour = 0.62137274 Miles per Hour, 5 Kilometers per Hour = 3.1068637 Miles per Hour, 10 Kilometers per Hour = 6.2137274 Miles per Hour, and 100 Kilometers per Hour = 62.137274 Miles per Hour. The full table further down covers every common value, and the calculator handles any number you need in between.