Conversion factors between the speed units people convert most often. For the reasoning behind these numbers, see How Speed Is Measured and Converted.
| 1 Unit | mph | km/h | m/s | knots |
|---|---|---|---|---|
| 1 mph | 1 | 1.60934 | 0.44704 | 0.86898 |
| 1 km/h | 0.62137 | 1 | 0.27778 | 0.53996 |
| 1 m/s | 2.23694 | 3.6 | 1 | 1.94384 |
| 1 knot | 1.15078 | 1.852 | 0.51444 | 1 |
The Speed Converter converts between mph, km/h, m/s, and knots instantly.
Speed Converter
A knot is one nautical mile per hour, equal to 1.852 km/h. It’s the standard speed unit in maritime and aviation navigation.
Divide by 3.6. For example, 90 km/h ÷ 3.6 = 25 m/s.
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