1 knot = 1.150779448 miles per hour
A knot is 1.15078 mph. Hurricane categories are defined in knots and reported in mph, which is why the thresholds look arbitrary in either unit.
Formula mph = kn × 1.150779448024
Type in either field — the other updates on every keystroke. Need other units? Open the full speed converter.
| Knot | Mile per hour |
|---|---|
| 1 kn | 1.150779 mph |
| 2 kn | 2.301559 mph |
| 3 kn | 3.452338 mph |
| 4 kn | 4.603118 mph |
| 5 kn | 5.753897 mph |
| 10 kn | 11.507794 mph |
| 15 kn | 17.261692 mph |
| 20 kn | 23.015589 mph |
| 25 kn | 28.769486 mph |
| 50 kn | 57.538972 mph |
| 100 kn | 115.077945 mph |
| 500 kn | 575.389724 mph |
| 1000 kn | 1150.779448 mph |
| Mile per hour | Knot |
|---|---|
| 1 mph | 0.868976 kn |
| 2 mph | 1.737952 kn |
| 3 mph | 2.606929 kn |
| 4 mph | 3.475905 kn |
| 5 mph | 4.344881 kn |
| 10 mph | 8.689762 kn |
| 15 mph | 13.034644 kn |
| 20 mph | 17.379525 kn |
| 25 mph | 21.724406 kn |
| 50 mph | 43.448812 kn |
| 100 mph | 86.897624 kn |
| 500 mph | 434.488121 kn |
| 1000 mph | 868.976242 kn |
| Situation | From | To |
|---|---|---|
| Gentle breeze | 5 knots | 5.754 mph |
| Fresh breeze | 10 knots | 11.51 mph |
| Strong wind | 20 knots | 23.02 mph |
| Gale | 35 knots | 40.28 mph |
| Ferry | 30 knots | 34.52 mph |
| Airliner | 450 knots | 517.9 mph |
Add 15% to the knots. 20 knots is 23 mph, against an exact 23.02.
Marine forecasts, sailing and aviation use knots. A wind of 20 knots is 23 mph.
A knot is one nautical mile per hour, so "knots per hour" is wrong. A nautical mile (1.852 km) is longer than a statute mile.
The knot takes its name from the knotted rope of the old chip log. It is exactly 1.852 km/h.