MPH to KPH Converter
Type a value in miles per hour to see it in kilometers per hour as you type, with the exact formula and a reference chart.
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- knots
- 52.139 kn
How this was calculated
- 1 mile per hour = 1.609344 kilometers per hour
- 60 × 1.609344 = 96.56064 km/h
| mph | km/h |
|---|---|
| 5 mph | 8.04672 km/h |
| 10 mph | 16.0934 km/h |
| 15 mph | 24.1402 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 35 mph | 56.327 km/h |
| 40 mph | 64.3738 km/h |
| 45 mph | 72.4205 km/h |
| 50 mph | 80.4672 km/h |
| 55 mph | 88.5139 km/h |
| 60 mph | 96.5606 km/h |
| 65 mph | 104.607 km/h |
| 70 mph | 112.654 km/h |
| 75 mph | 120.701 km/h |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
| 120 mph | 193.121 km/h |
| km/h | mph |
|---|---|
| 10 km/h | 6.21371 mph |
| 20 km/h | 12.4274 mph |
| 30 km/h | 18.6411 mph |
| 40 km/h | 24.8548 mph |
| 50 km/h | 31.0686 mph |
| 60 km/h | 37.2823 mph |
| 70 km/h | 43.496 mph |
| 80 km/h | 49.7097 mph |
| 90 km/h | 55.9234 mph |
| 100 km/h | 62.1371 mph |
| 110 km/h | 68.3508 mph |
| 120 km/h | 74.5645 mph |
How to convert miles per hour to kilometers per hour
1 mile per hour = 1.609344 kilometers per hour. To convert miles per hour to kilometers per hour, multiply by 1.609344. One mile per hour is 1,609.344 m covered in one hour. One kilometer per hour is 1,000 m covered in one hour.
Worked examples
- 30 miles per hour = 48.2803 km/h (30 × 1.609344)
- 60 miles per hour = 96.5606 km/h (60 × 1.609344)
- 70 miles per hour = 112.654 km/h (70 × 1.609344)
Where this conversion comes up
Miles per hour are used for speed limits and car speedometers in the US and UK; kilometers per hour for speed limits in most of the world and wind speed in forecasts. A mile is 1.609344 km, so 60 mph is 96.6 km/h and 70 mph (the UK motorway limit) is 112.7 km/h.
Quick estimate
Multiply by 1.6 (0.6% low).
Common mistakes
- Dividing instead of multiplying. A kilometer per hour is smaller than a mile per hour, so the number of kilometers per hour must come out larger: 30 miles per hour = 48.2803 km/h.
- Rounding too early. Keep the full factor until the last step; rounding 1.61 to 2 first puts large values noticeably off.
Going the other way? Use the kph to mph converter. Related speed converters: knots to mph, mph to knots, mph to m/s, m/s to mph, fps to mph, mph to fps.
Frequently asked questions
How do you convert miles per hour to kilometers per hour?
Multiply the miles per hour by 1.609344. For example, 60 miles per hour is 96.5606 kilometers per hour.
How many kilometers per hour are in one mile per hour?
One mile per hour is 1.609344 kilometers per hour. One mile per hour is 1,609.344 m covered in one hour.
What is 70 miles per hour in kilometers per hour?
70 miles per hour is 112.654 kilometers per hour.
Is there a quick way to estimate miles per hour to kilometers per hour?
Multiply by 1.6 (0.6% low).