Kilometers per Hour (km/h) to Miles per Hour (mph) Converter
Enter a value to instantly convert between speed units.
1 Kilometer per Hour = 0.6214 Mile per Hour
Key Formulas
Kilometer per Hour → Mile per Hour
mph = km/h × 0.621371Mile per Hour → Kilometer per Hour
km/h = mph × 1.60934Knot → Mile per Hour
mph = kn × 1.15078Mile per Hour → Knot
kn = mph × 0.868976Formula
mph = km/h × 0.621371One kilometer per hour equals 0.621371 miles per hour. Use this conversion when a speedometer and the road signs use different units.
Source: NIST SP 811, Table B.8
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
An example limit of 50 km/h is about 31 mph.
50 km/h = 31.07 mph
Example value: 90 km/h converts to about 56 mph.
90 km/h = 55.92 mph
A 120 km/h example, about 75 mph.
120 km/h = 74.56 mph
High-speed train or race speed. Not a road speed; used in context of trains, racing, or extreme scenarios.
200 km/h = 124.27 mph