Speed Conversion
MPH to KM/H Converter
Miles per hour is widely used in the United States and United Kingdom, while kilometers per hour is common in metric road systems.
Free Converter
Exact mathMile per Hour → Kilometer per Hour
Enter a value—
MPH to KM/H Converter formula
1 mph = 1.609344 km/h. Multiply the mph value by 1.609344 to get km/h.
Miles per hour is widely used in the United States and United Kingdom, while kilometers per hour is common in metric road systems.
Mile per Hour to Kilometer per Hour conversion table
| Mile per Hour (mph) | Kilometer per Hour (km/h) |
|---|---|
| 1 mph | 1.6093 km/h |
| 5 mph | 8.0467 km/h |
| 10 mph | 16.0934 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
How to use this conversion
- Enter the amount in Mile per Hour.
- Confirm Kilometer per Hour is selected as the target unit.
- The result updates instantly; use the swap button to reverse the conversion.
Accuracy and rounding
The underlying conversion uses the stored standard reference factor or built-in formula. Display rounding can be adjusted by the site administrator; for engineering or legal work, retain enough significant digits for your use case.
Conversions are mathematical reference conversions. Regional land units can vary by jurisdiction; use only a locally verified factor for region-dependent units such as bigha.