Miles per hour to Kilometers per hour Converter
Convert miles per hour (mph) to kilometers per hour (km/h) instantly. Type a value above and the result updates while you type. 1 mile per hour equals 1.60934 kilometers per hour.
Result updates as you type. Values are calculated locally in your browser — nothing is sent to a server.
The formula
1 mile per hour = 1.60934 kilometers per hour
Multiply the miles per hour value by 1.60934 to get kilometers per hour. Or divide by 0.621371 to go the other way.
Miles per hour to kilometers per hour conversion table
| mph | km/h |
|---|---|
| 1 | 1.60934 |
| 2 | 3.21869 |
| 3 | 4.82803 |
| 4 | 6.43738 |
| 5 | 8.04672 |
| 6 | 9.65606 |
| 7 | 11.2654 |
| 8 | 12.8748 |
| 9 | 14.4841 |
| 10 | 16.0934 |
| 15 | 24.1402 |
| 20 | 32.1869 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 75 | 120.701 |
| 100 | 160.934 |
Worked examples
- 5 mph × 1.60934 = 8.04672 km/h
- 30 mph × 1.60934 = 48.2803 km/h
- 165 mph × 1.60934 = 265.542 km/h
Conversion factors follow the exact international definitions (SI/BIPM; imperial units per the 1959 International Yard and Pound Agreement, maintained by NIST). NIST unit conversion reference
Factors last verified August 2026 · Built by Jeffrey Tepper.
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Frequently asked questions
How many kilometers per hour are in 1 mile per hour?
1 mile per hour equals 1.60934 kilometers per hour (mph → km/h).
How do you convert miles per hour to kilometers per hour?
Multiply the number of miles per hour by 1.60934. For example: 10 mph × 1.60934 = 16.0934 km/h.
What is 50 mph in km/h?
50 mph equals 80.4672 km/h.
Which is bigger: 1 mile per hour or 1 kilometer per hour?
1 mile per hour is bigger: it equals 1.60934 kilometers per hour.