Speed converter
m/s, km/h, mph, knots.
Worked example
100 kmh = 62.1371 mph. Type into either side of the converter above and the other side updates as you type — no Convert button, no page reload.
Kilometer per Hour (km/h) to Mile per Hour (mph) conversion table
Quick reference at the most common values. For any other input, use the live converter above.
| kmh | mph |
|---|---|
| 1 | 0.621371 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 20 | 12.427424 |
| 30 | 18.641136 |
| 50 | 31.06856 |
| 80 | 49.709695 |
| 100 | 62.137119 |
| 120 | 74.564543 |
Common speed conversions
Pick a different unit pair from the dropdowns above to see any of these.
m/s ↔ km/hmph ↔ km/hknots ↔ km/hft/s ↔ m/s
About speed units
Speed is length per unit time. The international standard is m/s, but road traffic uses km/h almost everywhere except the US, UK, and a handful of others where mph rules. Aviation and shipping stick to knots — one nautical mile per hour — for historical reasons tied to navigation by latitude.
Privacy
Every conversion above runs as a small JavaScript function in your browser. The values you type are never sent to a server — see the Privacy Policy for the full breakdown of what stays on your device and what (very little) we log.
Browse all unit categories · read about the project