This knots to miles per hour converter gives you the kn to mph result instantly, in your browser, with the exact ratio so you can verify it. 1 knot is about 1.15078 miles per hour, and going the other way, 1 mile per hour is 0.868976 knots. Knots are an SI unit used in science and engineering; miles per hour are an imperial unit still common in the United States and the United Kingdom.
To convert by hand, multiply the number of knots by 1.15078. For example, 10 knots is 11.5078 miles per hour and 100 knots is 115.078 miles per hour. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
kn to mph formula
mph = kn × 1.15078
1 knot is about 1.15078 miles per hour. Multiply the value in knots by that factor to get miles per hour.
Knots to Miles per hour conversion table
| knots | miles per hour | Rounded |
|---|---|---|
| 1 kn | 1.15078 mph | 1.15 |
| 2 kn | 2.30156 mph | 2.3 |
| 3 kn | 3.45234 mph | 3.45 |
| 4 kn | 4.60312 mph | 4.6 |
| 5 kn | 5.7539 mph | 5.75 |
| 6 kn | 6.90468 mph | 6.9 |
| 7 kn | 8.05546 mph | 8.06 |
| 8 kn | 9.20624 mph | 9.21 |
| 9 kn | 10.357 mph | 10.4 |
| 10 kn | 11.5078 mph | 11.5 |
| 12 kn | 13.8094 mph | 13.8 |
| 15 kn | 17.2617 mph | 17.3 |
| 20 kn | 23.0156 mph | 23 |
| 25 kn | 28.7695 mph | 28.8 |
| 30 kn | 34.5234 mph | 34.5 |
| 40 kn | 46.0312 mph | 46 |
| 50 kn | 57.539 mph | 57.5 |
| 60 kn | 69.0468 mph | 69 |
| 70 kn | 80.5546 mph | 80.6 |
| 75 kn | 86.3085 mph | 86.3 |
| 80 kn | 92.0624 mph | 92.1 |
| 90 kn | 103.57 mph | 104 |
| 100 kn | 115.078 mph | 115 |
| 150 kn | 172.617 mph | 173 |
| 200 kn | 230.156 mph | 23 |
| 250 kn | 287.695 mph | 288 |
| 300 kn | 345.234 mph | 345 |
| 500 kn | 575.39 mph | 575 |
| 750 kn | 863.085 mph | 863 |
| 1,000 kn | 1,150.78 mph | 1,151 |
Frequently asked questions
How many miles per hour are in 5 knots?
5 kn = 5.7539 mph. Multiply 5 by 1.15078, the number of miles per hour in one knot. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert knots to miles per hour?
mph = kn × 1.15078. The factor comes from the definitions of the units: 1 knot is about 1.15078 miles per hour. Worked example: 12 kn = 13.8094 mph.
Is 30 kn the same as 34.5234 mph?
Yes. 30 kn = 34.5234 mph. Rounded to four decimals it is 34.52 mph.
How do I convert miles per hour back to knots?
Divide by 1.15078, or multiply by 0.868976: 1 mile per hour is 0.868976 knots. The miles per hour to knots page linked above lists common values the other way.
Is the kn to mph conversion exact?
1 knot is about 1.15078 miles per hour. The ratio is a defined constant but produces a long decimal, so this page rounds to six significant digits, which is more precision than any everyday measurement needs.