Convert miles per hour to kilometres per hour
Enter a value in miles per hour (mph) to get kilometres per hour (km/h). One mile per hour is 1.6093 kilometres per hour; one kilometre per hour is 0.621371 miles per hour.
How to use the Mile per hour to kilometre per hour
- Type the number of miles per hour.
- Click Convert.
- Read the result in kilometres per hour, plus the same value in every other speed unit.
mph to km/h formula
kilometres per hour = miles per hour × 1.6093. To go the other way, miles per hour = kilometres per hour × 0.621371 (see kilometres per hour to miles per hour).
Worked example
12 mph × 1.6093 = 19.3121 km/h.
Miles per hour to kilometres per hour conversion table
| Miles per hour | Kilometres per hour |
|---|---|
| 0.1 mph | 0.160934 km/h |
| 0.5 mph | 0.804672 km/h |
| 1 mph | 1.6093 km/h |
| 2 mph | 3.2187 km/h |
| 3 mph | 4.828 km/h |
| 5 mph | 8.0467 km/h |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
| 250 mph | 402.336 km/h |
| 500 mph | 804.672 km/h |
| 1,000 mph | 1,609.34 km/h |
About the mile per hour
Road speed limits in the USA and UK; exactly 1.609344 km/h.
About the kilometre per hour
Road speed limits in most countries.
Related conversions
kilometres per hour to miles per hour · miles per hour to knots · miles per hour to feet per second · any unit.
Frequently asked questions
How many kilometres per hour in a mile per hour?
1.6093 kilometres per hour.
How many miles per hour in a kilometre per hour?
0.621371 miles per hour.
Is the factor exact?
The factor 1.6093 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.