How to convert knots to miles per hour
- Type the value in knots (kn) in the box above.
- The result in miles per hour appears instantly, along with the same value in every other unit of speed.
- Press ⇄ to convert the other way.
Formula
mph = knots × 1.15078. So 1 kn = 1.15078 mph, and 20 kn = 23.0156 mph.
Knots are the speed unit of ships, aircraft and wind forecasts: one knot is one nautical mile (1852 m) per hour. Converting to miles per hour helps make sense of wind warnings and boat speeds; multiply by about 1.15. A 30-knot wind is 34.5 mph, and an airliner cruising at 480 knots flies about 552 mph through the air.
kn to mph conversion chart
| Knots | Miles per hour |
|---|---|
| 1 kn | 1.15078 mph |
| 5 kn | 5.7539 mph |
| 10 kn | 11.5078 mph |
| 15 kn | 17.2617 mph |
| 20 kn | 23.0156 mph |
| 25 kn | 28.7695 mph |
| 30 kn | 34.5234 mph |
| 40 kn | 46.0312 mph |
| 50 kn | 57.539 mph |
| 100 kn | 115.078 mph |
| 500 kn | 575.39 mph |
FAQ
How fast is 20 knots in mph?
23.0 mph (37 km/h).
How do I convert kn to mph?
Use mph = knots × 1.15078. Or type the value above and the converter does it for you.
How do I convert mph back to kn?
Multiply by 0.868976, or press the ⇄ button in the converter.