Kilometers per hour to Miles per hour formula
miles per hour = kilometers per hour × 0.621371
Multiply the number of kilometers per hour by 0.621371 to get miles per hour. To go the other way, multiply by 1.60934 instead, or use the mph to kmh converter.
Kilometers per hour to Miles per hour conversion table
Common kmh to mph values, rounded for reading. The converter above keeps full precision.
| Kilometers per hour | Miles per hour |
|---|---|
| 1 km/h | 0.621371 mph |
| 2 km/h | 1.24274 mph |
| 3 km/h | 1.86411 mph |
| 4 km/h | 2.48548 mph |
| 5 km/h | 3.10686 mph |
| 10 km/h | 6.21371 mph |
| 15 km/h | 9.32057 mph |
| 20 km/h | 12.4274 mph |
| 25 km/h | 15.5343 mph |
| 50 km/h | 31.0686 mph |
| 75 km/h | 46.6028 mph |
| 100 km/h | 62.1371 mph |
| 250 km/h | 155.343 mph |
| 500 km/h | 310.686 mph |
| 1,000 km/h | 621.371 mph |
Worked example
To convert 10 km/h to miles per hour, multiply by 0.621371: the result is 6.21371 mph. 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 miles per hour are in a kilometer per hour?
One kilometer per hour equals 0.621371 miles per hour (1 km/h = 0.621371 mph).
What is 10 kilometers per hour in miles per hour?
10 km/h converts to 6.21371 mph. Enter any other value in the converter above to see it recalculated instantly.
How do I convert miles per hour back to kilometers per hour?
Reverse the calculation: one mile per hour equals 1.60934 kilometers per hour. You can also swap the units in the converter or open the mph to kmh page.
Related speed conversions
Need a different pair? Open the full speed converter to choose any two units.