Convert KM/H to MPH
Switch metric speeds into mph for US speed limits, comparing car launches and reading European spec sheets.
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1 km/h = 0.62137 mph
Quick reference
| Kilometers per hour | Miles per hour |
|---|---|
| 30 | 18.64 mph |
| 50 | 31.07 mph |
| 80 | 49.71 mph |
| 100 | 62.14 mph |
| 120 | 74.56 mph |
| 200 | 124.27 mph |
Formula
mph = km/h × 0.621371
Frequently asked questions
- How fast is 100 km/h in mph?
- 100 km/h equals 62.14 mph — the typical European highway speed limit.
- Is the conversion linear?
- Yes. Both units are simple ratios of distance over time, so doubling the input doubles the output exactly.