Convert UnitsFast, accurate unit conversions
Speed

Kmh to mph Converter

Convert kilometer per hour to mile per hour instantly.

Formulamph = km/h × 0.621371192237
Sources and methodology1 km/h = 0.621371192237 mph — exactly. exactly

Quick conversion table

kilometer per hourmile per hour
1 km/h0.621371192237 mph
5 km/h3.10685596119 mph
10 km/h6.21371192237 mph
30 km/h18.6411357671 mph
50 km/h31.0685596119 mph
60 km/h37.2822715342 mph
100 km/h62.1371192237 mph
120 km/h74.5645430685 mph

Unit definitions

kilometer per hour (km/h)

kilometer per hour is a unit of Speed. In this converter it is defined against the category base unit as 1 km/h = 0.277777777778 m/s.

mile per hour (mph)

mile per hour is a unit of Speed. In this converter it is defined against the category base unit as 1 mph = 0.44704 m/s.

Example

10 km/h = 6.21371192237 mph

Sources and methodology

Definitions: BIPM SI Brochure and NIST conversion guidance. Methodology.