Speed and distance units: knots, km/h, nautical miles
One knot is one nautical mile per hour. A nautical mile is exactly 1852 m and a cable is a tenth of a mile, 185.2 m.
Result
kn
km/h
m/s
mph
nm
km
cbl
mi
m
How it is calculated
1 kn = 1.852 km/h = 0.5144 m/s = 1.1508 mph. 1 nm = 1852 m = 10 cables = 1.1508 statute miles.
Reference only. The maker's manual and class rules take priority.
Reference table
| kn | km/h | m/s | mph |
|---|---|---|---|
| 1 | 1.9 | 0.51 | 1.2 |
| 2 | 3.7 | 1.03 | 2.3 |
| 5 | 9.3 | 2.57 | 5.8 |
| 8 | 14.8 | 4.12 | 9.2 |
| 10 | 18.5 | 5.14 | 11.5 |
| 12 | 22.2 | 6.17 | 13.8 |
| 14 | 25.9 | 7.20 | 16.1 |
| 15 | 27.8 | 7.72 | 17.3 |
| 16 | 29.6 | 8.23 | 18.4 |
| 18 | 33.3 | 9.26 | 20.7 |
| 20 | 37.0 | 10.29 | 23.0 |
| 25 | 46.3 | 12.86 | 28.8 |
| 30 | 55.6 | 15.43 | 34.5 |