1 kn = 1.15078 mph
1 knot equals 1.15078 miles per hour. To convert knots to miles per hour, multiply the knot value by 1.15078. For quick reference: 1 kn = 1.15078 mph, 5 kn = 5.7539 mph, 10 kn = 11.5078 mph, 100 kn = 115.078 mph.
Miles per hour = Knots × 1.15078Start with your value in knots.
Multiply the knot value by 1.15078. This is the exact conversion factor from knots to miles per hour.
The product is your value in miles per hour. For example, 5 kn × 1.15078 = 5.7539 mph.
The exact factor from knots to miles per hour is 1.15078.
Miles per hour = Knots × 1.15078
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Knots (kn) | Miles per hour (mph) |
|---|---|
| 1 kn | 1.1508 mph |
| 2 kn | 2.3016 mph |
| 3 kn | 3.4523 mph |
| 4 kn | 4.6031 mph |
| 5 kn | 5.7539 mph |
| 6 kn | 6.9047 mph |
| 7 kn | 8.0555 mph |
| 8 kn | 9.2062 mph |
| 9 kn | 10.357 mph |
| 10 kn | 11.508 mph |
| 12 kn | 13.809 mph |
| 15 kn | 17.262 mph |
| 18 kn | 20.714 mph |
| 20 kn | 23.016 mph |
| 22 kn | 25.317 mph |
| 25 kn | 28.769 mph |
| 28 kn | 32.222 mph |
| 30 kn | 34.523 mph |
| 32 kn | 36.825 mph |
| 35 kn | 40.277 mph |
| 40 kn | 46.031 mph |
| 45 kn | 51.785 mph |
| 50 kn | 57.539 mph |
| 55 kn | 63.293 mph |
| 60 kn | 69.047 mph |
| 65 kn | 74.801 mph |
| 70 kn | 80.555 mph |
| 75 kn | 86.308 mph |
| 80 kn | 92.062 mph |
| 85 kn | 97.816 mph |
| 90 kn | 103.57 mph |
| 95 kn | 109.32 mph |
| 100 kn | 115.08 mph |
| 110 kn | 126.59 mph |
| 120 kn | 138.09 mph |
| 130 kn | 149.6 mph |
| 140 kn | 161.11 mph |
| 150 kn | 172.62 mph |
| 160 kn | 184.12 mph |
| 180 kn | 207.14 mph |
| 200 kn | 230.16 mph |
| 220 kn | 253.17 mph |
| 250 kn | 287.69 mph |
| 280 kn | 322.22 mph |
| 300 kn | 345.23 mph |
| 350 kn | 402.77 mph |
| 400 kn | 460.31 mph |
| 500 kn | 575.39 mph |
| 700 kn | 805.55 mph |
| 1000 kn | 1150.8 mph |
A cruise ship typically travels at 20–25 kn. A commercial airliner cruises at about 480 kn. In miles per hour, that gives you: 1 kn = 1.15078 mph, 10 kn = 11.5078 mph, 100 kn = 115.078 mph.
The knot (kn) is one nautical mile per hour, or exactly 1852/3600 ≈ 0.5144 m/s. It is the standard speed unit in maritime and aviation use because it relates directly to latitude — one knot covers one minute of arc per hour. The name comes from the historical practice of measuring ship speed by counting knots passed on a line trailing behind the vessel.
The mile per hour (mph) is the customary speed unit in the United States and the United Kingdom. The conversion 1 mph = 0.44704 m/s is exact, derived from 1 mile = 1609.344 m. A useful mental shortcut: multiply mph by 1.6 to get a close km/h estimate.