mph to km/h Converter
Conversion formula
1 mph = 1.609344 km/h
US and UK road signs, cars and treadmills show miles per hour. Converting to km/h helps when driving abroad or comparing car performance with European figures.
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mph
kilometers per hour
88.5139 km/h
Full calculators:Speed Converter
How to convert miles per hour to kilometers per hour
- 1
1 mile per hour = 1.609344 kilometers per hour, so multiply by 1.609344.
- 2
Example: 55 × 1.609344 = 88.5139 km/h.
mph to km/h conversion chart
| mph | km/h |
|---|---|
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 40 mph | 64.3738 km/h |
| 50 mph | 80.4672 km/h |
| 55 mph | 88.5139 km/h |
| 60 mph | 96.5606 km/h |
| 65 mph | 104.6074 km/h |
| 70 mph | 112.6541 km/h |
| 75 mph | 120.7008 km/h |
| 80 mph | 128.7475 km/h |
| 100 mph | 160.9344 km/h |
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Frequently asked questions
How do I convert miles per hour to kilometers per hour?
1 mile per hour = 1.609344 kilometers per hour, so multiply by 1.609344. For example, 55 mph = 88.5139 km/h.
How many kilometers per hour are in one mile per hour?
One mile per hour equals 1.609344 kilometers per hour.
Is the mph to km/h conversion exact?
Yes. A mile is exactly 1.609344 km, so 1 mph is exactly 1.609344 km/h. Results are rounded only for display.