Speed converter
Knots to Miles per Hour
If you need to know how many Miles per Hour one Knots contains, the answer is 1.150779. The conversion is linear, so 10 kn is 11.507794 mph and 100 kn is 115.077945 mph. Use the converter for any other value.
Formula 1 kn = 1.150779 mph
Need the other direction? Miles per Hour to Knots.
How to convert Knots to Miles per Hour
One knot is one nautical mile per hour, exactly 1.852 km/h. Miles per hour is the standard road-speed unit in the US and UK, equal to 1.609344 km/h.
To convert Knots to Miles per Hour, multiply the value in kn by 1.150779. For example, 10 kn × 1.150779 = 11.507794 mph. This works because the ratio between the two units is constant for every value in speed.
Worked examples
| kn | mph |
|---|---|
| 1 kn | 1.150779 mph |
| 2.5 kn | 2.876949 mph |
| 5 kn | 5.753897 mph |
| 10 kn | 11.507794 mph |
| 25 kn | 28.769486 mph |
| 50 kn | 57.538972 mph |
| 100 kn | 115.077945 mph |
Reverse conversion
| mph | kn |
|---|---|
| 1 mph | 0.86897624 kn |
| 5 mph | 4.344881 kn |
| 10 mph | 8.689762 kn |
| 25 mph | 21.724406 kn |
| 50 mph | 43.448812 kn |
| 100 mph | 86.897624 kn |
When this conversion is useful
This is the calculation you need when you are reading a car spec, a weather report or an aviation document from another country. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 kn is 1,150.78 mph.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
kn to mph conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Knots (kn) | Miles per Hour (mph) |
|---|---|
| 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 |
| 6 kn | 6.904677 mph |
| 7 kn | 8.055456 mph |
| 8 kn | 9.206236 mph |
| 9 kn | 10.357015 mph |
| 10 kn | 11.507794 mph |
| 11 kn | 12.658574 mph |
| 12 kn | 13.809353 mph |
| 13 kn | 14.960133 mph |
| 14 kn | 16.110912 mph |
| 15 kn | 17.261692 mph |
| 16 kn | 18.412471 mph |
| 17 kn | 19.563251 mph |
| 18 kn | 20.71403 mph |
| 19 kn | 21.86481 mph |
| 20 kn | 23.015589 mph |
| 21 kn | 24.166368 mph |
| 22 kn | 25.317148 mph |
| 23 kn | 26.467927 mph |
| 24 kn | 27.618707 mph |
| 25 kn | 28.769486 mph |
| 26 kn | 29.920266 mph |
| 27 kn | 31.071045 mph |
| 28 kn | 32.221825 mph |
| 29 kn | 33.372604 mph |
| 30 kn | 34.523383 mph |
| 31 kn | 35.674163 mph |
| 32 kn | 36.824942 mph |
| 33 kn | 37.975722 mph |
| 34 kn | 39.126501 mph |
| 35 kn | 40.277281 mph |
| 36 kn | 41.42806 mph |
| 37 kn | 42.57884 mph |
| 38 kn | 43.729619 mph |
| 39 kn | 44.880398 mph |
| 40 kn | 46.031178 mph |
| 41 kn | 47.181957 mph |
| 42 kn | 48.332737 mph |
| 43 kn | 49.483516 mph |
| 44 kn | 50.634296 mph |
| 45 kn | 51.785075 mph |
| 46 kn | 52.935855 mph |
| 47 kn | 54.086634 mph |
| 48 kn | 55.237414 mph |
| 49 kn | 56.388193 mph |
| 50 kn | 57.538972 mph |
| 60 kn | 69.046767 mph |
| 70 kn | 80.554561 mph |
| 80 kn | 92.062356 mph |
| 90 kn | 103.57015 mph |
| 100 kn | 115.077945 mph |
Frequently asked questions
How many Miles per Hour are in 1 Knots?
1 kn equals 1.150779 mph.
How do I convert Knots to Miles per Hour?
Multiply the kn value by 1.150779. Example: 25 kn = 28.769486 mph.
What is 2.5 kn in mph?
2.5 kn = 2.876949 mph.
Is the kn to mph conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.