Convert Miles per Hour to Kilometers per Hour
mph to km/h · speed conversion
What are miles per hour and kilometers per hour?
Miles per hour is the standard speed unit for roads in the US and UK. Kilometers per hour is the standard metric unit for vehicle speed in most countries. For reference: a brisk walk is about 5 km/h (3 mph), and highway speed is around 100 km/h (62 mph).
How to convert miles per hour to kilometers per hour
1 mph = 1.60934 km/h. To convert, multiply the number of miles per hour by 1.60934. For example, 5 mph = 8.04671 km/h, and 20 mph = 32.1869 km/h. To go the other way, multiply kilometers per hour by 0.621372 (since 1 km/h = 0.621372 mph).
Miles per Hour to Kilometers per Hour conversion table
| Miles per Hour (mph) | Kilometers per Hour (km/h) |
|---|---|
| 1 | 1.60934 |
| 5 | 8.04671 |
| 10 | 16.0934 |
| 30 | 48.2803 |
| 60 | 96.5606 |
| 100 | 160.934 |
| 120 | 193.121 |
FAQ
What is 1 mph in km/h?
1 mph = 1.60934 km/h. To convert any amount, multiply the number of miles per hour by 1.60934.
How do I convert kilometers per hour back to miles per hour?
Go the other way: 1 km/h = 0.621372 mph, so multiply kilometers per hour by 0.621372 to get miles per hour.
Is a miles per hour bigger than a kilometers per hour?
Yes — 1 mph is the larger unit, equal to 1.60934 km/h.
Are these speed conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.