Tool · calculator
Knots to km/h – convert speed on the water
A knot is one nautical mile per hour: 1.852 km/h.
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Knots
km/h
m/s
mph
Typical speeds
| Knots | km/h | m/s | mph |
|---|---|---|---|
| 1 | 1.85 | 0.51 | 1.15 |
| 3 | 5.56 | 1.54 | 3.45 |
| 5 | 9.26 | 2.57 | 5.75 |
| 6 | 11.11 | 3.09 | 6.9 |
| 8 | 14.82 | 4.12 | 9.21 |
| 10 | 18.52 | 5.14 | 11.51 |
| 15 | 27.78 | 7.72 | 17.26 |
| 20 | 37.04 | 10.29 | 23.02 |
| 25 | 46.3 | 12.86 | 28.77 |
| 30 | 55.56 | 15.43 | 34.52 |
| 40 | 74.08 | 20.58 | 46.03 |
| 50 | 92.6 | 25.72 | 57.54 |
How we calculate
1 knot = 1 nautical mile per hour = 1,852 metres per hour. That gives 1 knot = 1.852 km/h ≈ 0.514 m/s. One mph is one international mile (1,609.344 m) per hour, so 1 knot ≈ 1.151 mph.