Convert kilometers per hour to miles 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 kilometers per hour to miles per hour
Multiply the value by 0.6213711922.
mph = km/h × 0.6213711922Example: 10 km/h = 6.2137 mph.
Kilometers per hour to Miles per hour conversion table
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 1 km/h | 0.6214 mph |
| 2 km/h | 1.2427 mph |
| 3 km/h | 1.8641 mph |
| 4 km/h | 2.4855 mph |
| 5 km/h | 3.1069 mph |
| 10 km/h | 6.2137 mph |
| 15 km/h | 9.3206 mph |
| 20 km/h | 12.4274 mph |
| 25 km/h | 15.5343 mph |
| 50 km/h | 31.0686 mph |
| 100 km/h | 62.1371 mph |
Frequently asked questions
How many miles per hour is 1 km/h?
1 km/h equals 0.6214 miles per hour.
What is the formula to convert km/h to mph?
To convert km/h to mph, multiply the value by 0.6213711922. The full formula is: mph = km/h × 0.6213711922.
How do I convert miles per hour back to kilometers per hour?
Use the same calculator above and type your value into the miles per hour field instead — it converts in both directions. Or use the reverse formula: km/h = mph ÷ 0.6213711922.
Is the km/h to mph conversion exact?
The conversion factor used here (0.6213711922) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.