Miles per hour to Kilometers per hour formula
kilometers per hour = miles per hour × 1.60934
Multiply the number of miles per hour by 1.60934 to get kilometers per hour. To go the other way, multiply by 0.621371 instead, or use the kmh to mph converter.
Miles per hour to Kilometers per hour conversion table
Common mph to kmh values, rounded for reading. The converter above keeps full precision.
| Miles per hour | Kilometers per hour |
|---|---|
| 1 mph | 1.60934 km/h |
| 2 mph | 3.21869 km/h |
| 3 mph | 4.82803 km/h |
| 4 mph | 6.43738 km/h |
| 5 mph | 8.04672 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 |
| 50 mph | 80.4672 km/h |
| 75 mph | 120.701 km/h |
| 100 mph | 160.934 km/h |
| 250 mph | 402.336 km/h |
| 500 mph | 804.672 km/h |
| 1,000 mph | 1,609.34 km/h |
Worked example
To convert 10 mph to kilometers per hour, multiply by 1.60934: the result is 16.0934 km/h. One knot is exactly one nautical mile per hour. A nautical mile is exactly 1,852 meters, so 1 knot equals 1.150779448 mph and 1.852 km/h.
Frequently asked questions
How many kilometers per hour are in a mile per hour?
One mile per hour equals 1.60934 kilometers per hour (1 mph = 1.60934 km/h).
What is 10 miles per hour in kilometers per hour?
10 mph converts to 16.0934 km/h. Enter any other value in the converter above to see it recalculated instantly.
How do I convert kilometers per hour back to miles per hour?
Reverse the calculation: one kilometer per hour equals 0.621371 miles per hour. You can also swap the units in the converter or open the kmh to mph page.
Related speed conversions
Need a different pair? Open the full speed converter to choose any two units.