Knots to MPH Converter
1 knot = 1.15078 mph (1.852 km/h), so 22 knots is 25.32 mph. Multiply knots by 1.15078 to get miles per hour, or divide mph by 1.15078 to get knots.
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Knots to MPH conversion table
Quick answers: 15 knots = 17.26 mph · 17 knots = 19.56 mph · 20 knots = 23.02 mph · 21 knots = 24.17 mph · 22 knots = 25.32 mph · 25 knots = 28.77 mph · 30 knots = 34.52 mph
Every boat speed from 1 to 50 knots in miles per hour and kilometers per hour. Find your knots in the left column and read across.
| Knots | MPH | km/h |
|---|---|---|
| 1 | 1.15 | 1.85 |
| 2 | 2.30 | 3.70 |
| 3 | 3.45 | 5.56 |
| 4 | 4.60 | 7.41 |
| 5 | 5.75 | 9.26 |
| 6 | 6.90 | 11.11 |
| 7 | 8.06 | 12.96 |
| 8 | 9.21 | 14.82 |
| 9 | 10.36 | 16.67 |
| 10 | 11.51 | 18.52 |
| 11 | 12.66 | 20.37 |
| 12 | 13.81 | 22.22 |
| 13 | 14.96 | 24.08 |
| 14 | 16.11 | 25.93 |
| 15 | 17.26 | 27.78 |
| 16 | 18.41 | 29.63 |
| 17 | 19.56 | 31.48 |
| 18 | 20.71 | 33.34 |
| 19 | 21.86 | 35.19 |
| 20 | 23.02 | 37.04 |
| 21 | 24.17 | 38.89 |
| 22 | 25.32 | 40.74 |
| 23 | 26.47 | 42.60 |
| 24 | 27.62 | 44.45 |
| 25 | 28.77 | 46.30 |
| Knots | MPH | km/h |
|---|---|---|
| 26 | 29.92 | 48.15 |
| 27 | 31.07 | 50.00 |
| 28 | 32.22 | 51.86 |
| 29 | 33.37 | 53.71 |
| 30 | 34.52 | 55.56 |
| 31 | 35.67 | 57.41 |
| 32 | 36.82 | 59.26 |
| 33 | 37.98 | 61.12 |
| 34 | 39.13 | 62.97 |
| 35 | 40.28 | 64.82 |
| 36 | 41.43 | 66.67 |
| 37 | 42.58 | 68.52 |
| 38 | 43.73 | 70.38 |
| 39 | 44.88 | 72.23 |
| 40 | 46.03 | 74.08 |
| 41 | 47.18 | 75.93 |
| 42 | 48.33 | 77.78 |
| 43 | 49.48 | 79.64 |
| 44 | 50.63 | 81.49 |
| 45 | 51.79 | 83.34 |
| 46 | 52.94 | 85.19 |
| 47 | 54.09 | 87.04 |
| 48 | 55.24 | 88.90 |
| 49 | 56.39 | 90.75 |
| 50 | 57.54 | 92.60 |
Rounded to two decimals. A nautical mile is exactly 1,852 m and a statute mile exactly 1,609.344 m, so 1 knot is 1.852 km/h and 1.15078 mph.
How the knots to mph converter works
A knot is one nautical mile per hour. The nautical mile is defined as exactly 1,852 meters and the statute mile as 1,609.344 meters, so every knot is 1.15078 mph and 1.852 km/h. The converter shows all three speeds at once and uses the same factors for distance.
- Speed. Convert knots, mph, or km/h into the other two. Enter knots or km/h and the headline answer is mph; enter mph and it is knots.
- Distance. Convert nautical miles, statute miles, or kilometers. A 48 nm crossing is 55.24 statute miles.
- Distance, speed, time. Enter any two in nautical miles, knots, and hours, and it solves the third. Leave the one you want solved blank.
Knots and nautical miles FAQ
How fast is 1 knot in mph?
1 knot is 1.15078 miles per hour, or 1.852 km/h. A knot is one nautical mile per hour, and the nautical mile is defined as exactly 1,852 meters.
How fast is 20 knots in mph?
20 knots is 23.02 mph, or 37.04 km/h. That is a comfortable cruise for many planing powerboats.
How do I convert mph to knots?
Divide miles per hour by 1.15078, which is the same as multiplying by 0.86898. 30 mph is 26.07 knots, and 50 mph is 43.45 knots.
Why do boats use knots instead of mph?
A nautical mile is one minute of latitude, so speeds in knots translate directly onto charts: a boat making 6 knots covers 6 minutes of latitude in an hour. The name comes from the knotted log line sailors paid out to measure speed.
Is a nautical mile longer than a regular mile?
Yes. A nautical mile is 1,852 meters (6,076 ft) against 1,609 meters (5,280 ft) for a statute mile, about 15 percent longer. A 48 nm crossing is roughly 55 statute miles.
How long does it take to travel 100 nautical miles?
Divide distance by speed in knots: at 20 knots, 100 nm takes 5 hours; at 8 knots it takes 12.5 hours. The distance, speed, time mode above solves any of the three from the other two.