Convert Mile per Hour to Kilometer per Hour
Live bidirectional calculator for Miles per Hour (mph) and Kilometers per Hour (km/h) with verified formula and conversion charts.
Speed5 units
How the Calculation Works (Linear Scaling)
Since 1 Mile per Hour = 1.609344 Kilometers per Hour, multiply the value in Miles per Hour by 1.609344.
Mile per Hour to Kilometer per Hour Conversion Table
Precomputed values for quick reference and printing.
| Mile per Hour | Kilometer per Hour |
|---|---|
| 1 mph | 1.6093 km/h |
| 2 mph | 3.2187 km/h |
| 3 mph | 4.828 km/h |
| 4 mph | 6.4374 km/h |
| 5 mph | 8.0467 km/h |
| 6 mph | 9.6561 km/h |
| 7 mph | 11.2654 km/h |
| 8 mph | 12.8748 km/h |
| 9 mph | 14.4841 km/h |
| 10 mph | 16.0934 km/h |
| 15 mph | 24.1402 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 40 mph | 64.3738 km/h |
| 50 mph | 80.4672 km/h |
| 75 mph | 120.7008 km/h |
| 100 mph | 160.9344 km/h |
| Kilometer per Hour | Mile per Hour |
|---|---|
| 1 km/h | 0.6214 mph |
| 2 km/h | 1.2427 mph |
| 3 km/h | 1.8641 mph |
| 4 km/h | 2.4855 mph |
| 5 km/h | 3.1069 mph |
| 6 km/h | 3.7282 mph |
| 7 km/h | 4.3496 mph |
| 8 km/h | 4.971 mph |
| 9 km/h | 5.5923 mph |
| 10 km/h | 6.2137 mph |
| 15 km/h | 9.3206 mph |
| 20 km/h | 12.4274 mph |
| 25 km/h | 15.5343 mph |
| 30 km/h | 18.6411 mph |
| 40 km/h | 24.8548 mph |
| 50 km/h | 31.0686 mph |
| 75 km/h | 46.6028 mph |
| 100 km/h | 62.1371 mph |
๐ Standard Benchmark Reference Values
International statute mile exact ratio.
Exact RatioAbout Mile per Hour (mph)
Unit of speed defined as exactly 1.609344 km/h (exactly 0.44704 meters per second).
History: Traditional imperial speed measurement standardized internationally in 1959.
Common Uses: Road speed limits and vehicle speedometers in the United States and United Kingdom.
About Kilometer per Hour (km/h)
Unit of speed defined as the number of kilometers traveled in one hour (1 km/h = 1/3.6 m/s โ 0.2778 m/s).
History: Standard metric vehicle speed unit adopted globally on automotive odometers and speed signs.
Common Uses: Road speed limits, train transit speeds, and cycling speeds outside the US and UK.
โ Frequently Asked Questions
How many Kilometers per Hour are in 1 Mile per Hour?
There are exactly 1.609344 Kilometers per Hour in 1 Mile per Hour (1 mph = 1.609344 km/h).
What is the formula to convert Mile per Hour to Kilometer per Hour?
The formula is: Kilometer per Hour = Mile per Hour ร 1.609344. Since 1 Mile per Hour = 1.609344 Kilometers per Hour, multiply the value in Miles per Hour by 1.609344.
How do I convert 1 mph to km/h manually?
To convert 1 mph to km/h: apply the formula Kilometer per Hour = Mile per Hour ร 1.609344. Substituting gives: 1 ร 1.609344 = 1.6093 km/h.