Convert kilometres per hour to miles per hour
Enter a value in kilometres per hour (km/h) to get miles per hour (mph). One kilometre per hour is 0.621371 miles per hour; one mile per hour is 1.6093 kilometres per hour.
How to use the Kilometre per hour to mile per hour
- Type the number of kilometres per hour.
- Click Convert.
- Read the result in miles per hour, plus the same value in every other speed unit.
km/h to mph formula
miles per hour = kilometres per hour × 0.621371. To go the other way, kilometres per hour = miles per hour × 1.6093 (see miles per hour to kilometres per hour).
Worked example
12 km/h × 0.621371 = 7.4565 mph.
Kilometres per hour to miles per hour conversion table
| Kilometres per hour | Miles per hour |
|---|---|
| 0.1 km/h | 0.062137 mph |
| 0.5 km/h | 0.310686 mph |
| 1 km/h | 0.621371 mph |
| 2 km/h | 1.2427 mph |
| 3 km/h | 1.8641 mph |
| 5 km/h | 3.1069 mph |
| 10 km/h | 6.2137 mph |
| 20 km/h | 12.4274 mph |
| 25 km/h | 15.5343 mph |
| 50 km/h | 31.0686 mph |
| 100 km/h | 62.1371 mph |
| 250 km/h | 155.3428 mph |
| 500 km/h | 310.6856 mph |
| 1,000 km/h | 621.3712 mph |
About the kilometre per hour
Road speed limits in most countries.
About the mile per hour
Road speed limits in the USA and UK; exactly 1.609344 km/h.
Related conversions
miles per hour to kilometres per hour · kilometres per hour to metres per second · kilometres per hour to knots · any unit.
Frequently asked questions
How many miles per hour in a kilometre per hour?
0.621371 miles per hour.
How many kilometres per hour in a mile per hour?
1.6093 kilometres per hour.
Is the factor exact?
The factor 0.621371 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.