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Convert between km/h, mph, m/s, knots, and more
Kilometer/Hour to Mile/Hour
| Kilometer/Hour | Mile/Hour |
|---|---|
| 1 km/h | 0.621372 mph |
| 5 km/h | 3.106858 mph |
| 10 km/h | 6.213717 mph |
| 25 km/h | 15.534292 mph |
| 50 km/h | 31.068584 mph |
| 100 km/h | 62.137169 mph |
| 500 km/h | 310.685845 mph |
| 1,000 km/h | 621.371689 mph |
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Quick reference for frequently used speed conversions
100 km/h
= 62.14 mph
Kilometers to Miles per hour
1 m/s
= 3.6 km/h
Meters per second to km/h
1 knot
= 1.852 km/h
Nautical speed
Mach 1
= 1,235 km/h
Speed of sound
Understand speed measurements with everyday examples
5 km/h
Average walking speed
100 km/h
Highway driving speed
900 km/h
Commercial airplane cruising speed
Mach 1
Speed of sound at sea level
Common questions about speed conversion
Divide km/h by 1.609 or multiply by 0.621. Example: 100 km/h ≈ 62.1 mph.
A knot is 1 nautical mile per hour ≈ 1.151 mph or 1.852 km/h. Used in maritime and aviation.
Mach number is speed relative to the speed of sound. Mach 1 ≈ 343 m/s or 1,235 km/h at sea level.
Complete list of 24 speed units supported