Miles per Hour (mph) to Kilometers per Hour (km/h) Converter
Enter a value to instantly convert between speed units.
Precision4 dp
1 Mile per Hour = 1.6093 Kilometer 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
km/h = mph × 1.60934One mile per hour equals 1.60934 kilometers per hour. Use this conversion when your speedometer reads mph and the road signs show km/h.
Source: NIST SP 811, Table B.8
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Frequently Asked Questions
Real-World Examples
An example limit of 25 mph is about 40 km/h.
25 mph = 40.23 km/h
A 55 mph example converts to about 88.5 km/h.
55 mph = 88.51 km/h
Example value: 70 mph, about 112.7 km/h.
70 mph = 112.65 km/h
Example speed of 100 mph, about 160.9 km/h.
100 mph = 160.93 km/h