Miles per Hour to Kilometers per Hour Converter
Convert miles per hour to kilometers per hour instantly, free in your browser. Enter a speed in mph and get the exact value in km/h — no upload, no sign up.
Your result will appear here
Result
kilometers per hour (km/h)
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1 mph = 1.60934 km/h · km/h = mph × 1.60934
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How to use
- Enter a value in miles per hour (mph) in the box above — it is already filled with 60 as an example.
- Click Convert to kilometers per hour (km/h) (or just keep typing — the result updates as you type).
- Read the converted value in kilometers per hour (km/h). Use Swap to convert back from kilometers per hour (km/h) to miles per hour (mph).
Frequently asked questions
What is the formula to convert miles per hour (mph) to kilometers per hour (km/h)?
1 mph = 1.60934 km/h . km/h = mph × 1.60934.
How do I convert kilometers per hour (km/h) back to miles per hour (mph)?
Use the reverse conversion: 1 km/h = 0.621371 mph . mph = km/h × 0.621371. Or just click the Swap button on this page — it flips the direction and converts your value back instantly.
When would I need to convert miles per hour (mph) to kilometers per hour (km/h)?
Miles per hour is the speed unit on roads in the United States and the United Kingdom, while km/h is used almost everywhere else. Use it to read foreign speed limits and compare vehicle speeds.