ACCURATE CONVERSION
Miles per hour to Kilometers per hour Converter
Convert miles per hour (mph) to kilometers per hour (km/h) with a standards-based formula.
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How to convert miles per hour to kilometers per hour
Enter a value in the converter above. The result updates immediately using the relationship below.
FORMULA1 mile per hour = 1.609344 kilometers per hour
Miles per hour to Kilometers per hour conversion table
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 | 1.609344 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 50 | 80.4672 |
| 100 | 160.9344 |
Common values
For a quick estimate, multiply by the factor above. Use more decimal places when technical work requires additional precision.
Frequently asked questions
How many kilometers per hour are in one mile per hour?
One mile per hour equals 1.609344 kilometers per hour.
How do you convert miles per hour to kilometers per hour?
Multiply the mile per hour value by 1.609344.
Can I convert kilometers per hour back to miles per hour?
Yes. One kilometer per hour equals 0.62137119 miles per hour; you can also use the swap button.