Convert kilometer per hour (km/h) to mile per hour (mph), or swap the units to reverse the calculation.
Printed from Calxy · https://www.calxy.net/conversion/kph-to-mph
Kilometer per hour → Mile per hour
0.6214 mph
1 kilometer per hour = 0.6214 miles per hour
1 kilometer per hour = 0.6213711922 miles per hour (exact definition; display rounded)
Meter per second (m/s)0.2778
Kilometer per hour (km/h)1
Mile per hour (mph)0.6214
Foot per second (ft/s)0.9113
Knot (kn)0.54
Mach (sea level) (Ma)0.0008
How to convert kph to mph
Multiply km/h by 0.6213711922 to get mph. The displayed factor is rounded; the calculator uses the full stored conversion factor.
Divide km/h by 1.609344. This converts speed only, without accounting for journey stops or traffic.
Worked example
100 km/h = 62.1371192237 mph. To reverse it, enter the unrounded output and select Swap units. Round only the final result; converting an already-rounded result back may not reproduce the original exactly.
Conversion table in both directions
km/h and mph reference values
Input
km/h → mph
mph → km/h
1
0.6213711922
1.609344
2
1.2427423845
3.218688
5
3.1068559612
8.04672
10
6.2137119224
16.09344
20
12.4274238447
32.18688
25
15.5342798059
40.2336
50
31.0685596119
80.4672
100
62.1371192237
160.9344
500
310.6855961187
804.672
1000
621.3711922373
1,609.344
Last updated . Results are estimates for informational purposes only.