km/h to mph Converter
Convert kilometers per hour (km/h) to miles per hour (mph). Includes a quick reference table and rounding controls.
Enter a value in km/h, 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 mph = km/h ÷ 1.609344 (and km/h = mph × 1.609344).
Examples
- 100 km/h ≈ 62.137 mph
- 60 km/h ≈ 37.282 mph
- 120 km/h ≈ 74.565 mph
FAQ
- What is the conversion from km/h to mph?
mph = km/h ÷ 1.609344. This is equivalent to mph = km/h × 0.621371192237334.
- 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.