Convert miles per hour to kilometers per hour instantly. Enter a value below, or use the formula and reference table further down the page.
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How to convert miles per hour to kilometers per hour
Multiply the value by 1.609344.
km/h = mph × 1.609344Example: 10 mph = 16.0934 km/h.
Miles per hour to Kilometers per hour conversion table
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 mph | 1.6093 km/h |
| 2 mph | 3.2187 km/h |
| 3 mph | 4.828 km/h |
| 4 mph | 6.4374 km/h |
| 5 mph | 8.0467 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 |
| 100 mph | 160.9344 km/h |
Frequently asked questions
How many kilometers per hour is 1 mph?
1 mph equals 1.6093 kilometers per hour.
What is the formula to convert mph to km/h?
To convert mph to km/h, multiply the value by 1.609344. The full formula is: km/h = mph × 1.609344.
How do I convert kilometers per hour back to miles per hour?
Use the same calculator above and type your value into the kilometers per hour field instead — it converts in both directions. Or use the reverse formula: mph = km/h ÷ 1.609344.
Is the mph to km/h conversion exact?
The conversion factor used here (1.609344) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.