Kilometers per Hour to Miles per Hour Converter
Convert kilometers per hour to miles per hour instantly, free in your browser. Enter a speed in km/h and get the exact value in mph — no upload, no sign up.
Your result will appear here
Result
1 km/h = 0.621371 mph · mph = km/h × 0.621371
How to use
- Enter a value in kilometers per hour (km/h) in the box above — it is already filled with 100 as an example.
- Click Convert to miles per hour (mph) (or just keep typing — the result updates as you type).
- Read the converted value in miles per hour (mph). Use Swap to convert back from miles per hour (mph) to kilometers per hour (km/h).
Frequently asked questions
What is the formula to convert kilometers per hour (km/h) to miles per hour (mph)?
1 km/h = 0.621371 mph . mph = km/h × 0.621371.
How do I convert miles per hour (mph) back to kilometers per hour (km/h)?
Use the reverse conversion: 1 mph = 1.60934 km/h . km/h = mph × 1.60934. 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 kilometers per hour (km/h) to miles per hour (mph)?
Speed limits are posted in km/h in most countries and in mph in the United States and the United Kingdom. This converter helps drivers, cyclists and runners compare speeds across countries. You can convert kmh to mph — no signup, nothing to install.
Related searches: kmh to mph conversion, convert kmh to mph, how many mph in 100 kmh, kmh to mph calculator, kilometers per hour to miles per hour converter.