| Knots | Mph |
|---|---|
| 1 | 1.15 |
| 2 | 2.30 |
| 5 | 5.75 |
| 10 | 11.51 |
| 15 | 17.26 |
| 20 | 23.02 |
| 25 | 28.77 |
| 30 | 34.52 |
| 40 | 46.03 |
| 50 | 57.54 |
| 60 | 69.05 |
| 100 | 115.08 |
How to convert knots to mph
Multiply the speed in knots by 1.150779. Example: 20 knots × 1.150779 = 23.02 mph.
The factor 1.150779 comes from the definitions: a nautical mile is exactly 1,852 meters and a statute mile 1,609.344 meters.
Frequently asked questions
What is a knot?
A knot is a speed of one nautical mile per hour, used at sea and in aviation.
What is a nautical mile?
A nautical mile is exactly 1,852 meters, about one minute of latitude, which is why charts and navigation use it.
Why do boats use knots instead of mph?
Because nautical charts measure distance in nautical miles: a speed in knots tells you directly how many chart miles you cover per hour.