Kilometers per Hour to Miles per Hour Converter (km/h to mph)
1 kilometers per hour = 0.621371 miles per hour. One mile per hour is 1.609344 km/h.
Result
120 km/h = 74.564543 mph
How to convert kilometers per hour to miles per hour
One mile per hour is 1.609344 km/h. The US and UK show speed limits in mph while most countries use km/h, so this is the speed conversion drivers and travellers use most.
Formula
mph = km/h × 0.621371
Worked example
120 km/h × 0.621371 = 74.5645 mph
Kilometers per Hour to Miles per Hour quick-reference table
| Kilometers per Hour (km/h) | Miles per Hour (mph) |
|---|---|
| 30 km/h | 18.6411 mph |
| 50 km/h | 31.0686 mph |
| 80 km/h | 49.7097 mph |
| 100 km/h | 62.1371 mph |
| 120 km/h | 74.5645 mph |
| 130 km/h | 80.7783 mph |
Real-life examples
A 120 km/h motorway limit is 74.6 mph, and a 50 km/h urban limit is 31.1 mph.
Frequently asked questions
How do I convert mph to km/h quickly?
Multiply by 1.6: 60 mph is about 96 km/h. The exact factor is 1.609344.
What is 100 km/h in mph?
100 km/h is 62.14 mph.
What is 1 kilometers per hour in miles per hour?
1 kilometers per hour = 0.621371 miles per hour (km/h to mph).
What is the formula to convert km/h to mph?
mph = km/h × 0.621371. For example, 120 km/h × 0.621371 = 74.5645 mph.
How do I convert mph back to km/h?
Use the reverse converter: 1 miles per hour = 1.60934 kilometers per hour. Check: 74.5645 mph converts back to 120 km/h.
Reverse conversion
Need the other direction? Miles per Hour to Kilometers per Hour converter (mph to km/h): 1 miles per hour = 1.60934 kilometers per hour.
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