mph to km/h Converter
Convert miles per hour (mph) to kilometers per hour (km/h). Includes rounding controls and a quick reference table.
Enter a value in mph, then convert. Press Ctrl/Cmd + Enter.
Result will appear here.
| Speed | Equivalent |
|---|
Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
Uses the exact definition: 1 mile = 1.609344 kilometers. So km/h = mph × 1.609344 (and mph = km/h ÷ 1.609344).
Examples
- 60 mph = 96.561 km/h
- 30 mph = 48.280 km/h
- 70 mph = 112.654 km/h
FAQ
- What is the conversion from mph to km/h?
km/h = mph × 1.609344 (because 1 mile = 1.609344 kilometers).
- Are negative speeds allowed?
Yes. Negative values are allowed for calculations (e.g., relative velocity).
- How accurate is this converter?
It uses standard unit definitions. Small differences can occur due to rounding.
- Are my inputs stored?
No. All calculations run locally in your browser.