Convert knots to mph
Enter a speed in knots and get miles per hour straight away. Used in sailing, boating and aviation, where a knot is one nautical mile per hour.
Formula: mph = knots × 1.150779
knots to mph table
Also written kts to mph or kn to mph.
| knots | mph |
|---|---|
| 1 knots | 1.15 mph |
| 2 knots | 2.3 mph |
| 3 knots | 3.45 mph |
| 5 knots | 5.75 mph |
| 10 knots | 11.51 mph |
| 15 knots | 17.26 mph |
| 20 knots | 23.02 mph |
| 25 knots | 28.77 mph |
| 30 knots | 34.52 mph |
| 35 knots | 40.28 mph |
| 40 knots | 46.03 mph |
| 45 knots | 51.79 mph |
| 50 knots | 57.54 mph |
| 60 knots | 69.05 mph |
| 70 knots | 80.55 mph |
| 80 knots | 92.06 mph |
| 90 knots | 103.57 mph |
| 100 knots | 115.08 mph |
| 120 knots | 138.09 mph |
| 150 knots | 172.62 mph |
| 200 knots | 230.16 mph |
| 250 knots | 287.69 mph |
See your real speed, in either unit
Apex turns your iPhone into a GPS speedometer — switch between knots, mph and knots with a tap, and record the whole trip.
Common questions
How do you convert knots to mph?
Multiply the speed in knots by 1.150779. For example, 30 knots × 1.150779 = 34.5 mph.
How fast is 30 knots in mph?
30 knots is 34.5 mph.
Why do boats and aircraft use knots?
A knot is one nautical mile per hour, and a nautical mile is based on one minute of latitude. That makes navigation charts and speed calculations line up neatly, which is why the unit stuck at sea and in the air.
Is a knot faster than a mph?
Yes. One knot is about 1.15 mph, so a speed in knots is always a slightly bigger number when converted to mph.