Miles per hour to Kilometers per hour Converter
Convert Miles per hour to Kilometers per hour (mph to km/h) quickly and accurately.
Quick conversion table
| Miles per hour | Kilometers per hour |
|---|---|
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 30 mph | 48.28032 km/h |
| 40 mph | 64.37376 km/h |
| 60 mph | 96.56064 km/h |
| 70 mph | 112.65408 km/h |
| 80 mph | 128.74752 km/h |
About this tool
Miles per hour (mph) is the imperial unit of speed used on speed limit signs and speedometers in the United States and the United Kingdom.
Kilometers per hour (km/h) is the metric unit used for the same purpose in almost every other country.
This converter helps when driving in, or reading vehicle specifications from, a country that uses the other unit — for example, converting a US speed limit into km/h before a road trip in Europe.
Worked example
- 1Start with your value in Miles per hour. For example, 30 mph.
- 2Apply the formula: 1 mph = 1.60934 km/h.
- 330 mph converts to 48.28032 km/h.
Formula
1 mph = 1.60934 km/h
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Frequently asked questions
- How do I convert Miles per hour to Kilometers per hour?
- Multiply the value in Miles per hour using the formula: 1 mph = 1.60934 km/h.
- How many Kilometers per hour is 1 Miles per hour?
- 1 mph is equal to 1.60934 km/h.
- How many Kilometers per hour is 10 Miles per hour?
- 10 mph is equal to 16.09344 km/h.
- How many Kilometers per hour is 100 Miles per hour?
- 100 mph is equal to 160.9344 km/h.
- Is the mph to km/h conversion exact?
- Yes. Since 1 mile is defined as exactly 1,609.344 meters, the mph-to-km/h factor is exact rather than approximated.