Miles per Hour to Knots (mph → kn)
Formula
1 mph = 0.8689769926367107 knConversion Table
| mph | kn |
|---|---|
| 0 | 0 |
| 1.0000 | 0.86898 |
| 2.0000 | 1.7380 |
| 3.0000 | 2.6069 |
| 4.0000 | 3.4759 |
| 5.0000 | 4.3449 |
| 6.0000 | 5.2139 |
| 7.0000 | 6.0828 |
| 8.0000 | 6.9518 |
| 9.0000 | 7.8208 |
| 10.000 | 8.6898 |
| 11.000 | 9.5587 |
| 12.000 | 10.428 |
| 13.000 | 11.297 |
| 14.000 | 12.166 |
| 15.000 | 13.035 |
| 16.000 | 13.904 |
| 17.000 | 14.773 |
| 18.000 | 15.642 |
| 19.000 | 16.511 |
| mph | kn |
|---|---|
| 20.000 | 17.380 |
| 21.000 | 18.249 |
| 22.000 | 19.117 |
| 23.000 | 19.986 |
| 24.000 | 20.855 |
| 25.000 | 21.724 |
| 26.000 | 22.593 |
| 27.000 | 23.462 |
| 28.000 | 24.331 |
| 29.000 | 25.200 |
| 30.000 | 26.069 |
| 31.000 | 26.938 |
| 32.000 | 27.807 |
| 33.000 | 28.676 |
| 34.000 | 29.545 |
| 35.000 | 30.414 |
| 36.000 | 31.283 |
| 37.000 | 32.152 |
| 38.000 | 33.021 |
| 39.000 | 33.890 |
| mph | kn |
|---|---|
| 40.000 | 34.759 |
| 41.000 | 35.628 |
| 42.000 | 36.497 |
| 43.000 | 37.366 |
| 44.000 | 38.235 |
| 45.000 | 39.104 |
| 46.000 | 39.973 |
| 47.000 | 40.842 |
| 48.000 | 41.711 |
| 49.000 | 42.580 |
| 50.000 | 43.449 |
| 51.000 | 44.318 |
| 52.000 | 45.187 |
| 53.000 | 46.056 |
| 54.000 | 46.925 |
| 55.000 | 47.794 |
| 56.000 | 48.663 |
| 57.000 | 49.532 |
| 58.000 | 50.401 |
| 59.000 | 51.270 |
| mph | kn |
|---|---|
| 60.000 | 52.139 |
| 61.000 | 53.008 |
| 62.000 | 53.877 |
| 63.000 | 54.746 |
| 64.000 | 55.615 |
| 65.000 | 56.484 |
| 66.000 | 57.352 |
| 67.000 | 58.221 |
| 68.000 | 59.090 |
| 69.000 | 59.959 |
| 70.000 | 60.828 |
| 71.000 | 61.697 |
| 72.000 | 62.566 |
| 73.000 | 63.435 |
| 74.000 | 64.304 |
| 75.000 | 65.173 |
| 76.000 | 66.042 |
| 77.000 | 66.911 |
| 78.000 | 67.780 |
| 79.000 | 68.649 |
Miles per Hour to Knots Conversion
Converting Miles per Hour (mph) to Knots (kn) is a common speed conversion. 1 mph equals 0.868977 kn. For example, 100 mph is equal to 86.897699 kn.
Quick Mental Math: Miles per Hour to Knots
Divide by 1.2: smaller result in knots.
Why is converting Miles per Hour to Knots tricky?
Decimal divisors require precision mental math can't provide.
Quick Reference Values
1 mph = 0.868977 kn. 5 mph = 4.344885 kn. 10 mph = 8.68977 kn. 25 mph = 21.724425 kn. 50 mph = 43.44885 kn. 100 mph = 86.897699 kn.
What is Miles per Hour?
Miles per Hour (mph) is a unit of speed. Miles per hour measure speed as miles traveled in one hour. One mile equals 1,609.344 meters, so 1 mph equals approximately 0.44704 meters per second [bipm-si-brochure]. This unit is widely used for vehicle speed and speed limits in non-metric countries. Miles per hour originated from the mile and hour units standardized in the British Imperial system. It became common in transportation with the rise of automobiles and was internationally recognized with the mile's 1959 definition [bipm-si-brochure]. The USA, United Kingdom, and several Commonwealth nations use mph for road speed limits and vehicle speeds. It remains standard in aviation and motorsports within these countries, despite metrication efforts [nist-sp-811].
What is Knots?
Knots (kn) is a unit of speed. A knot is a unit of speed equal to one nautical mile per hour. It precisely corresponds to 1.852 kilometers per hour or 0.51444 meters per second. The knot is internationally recognized for maritime and aviation speed measurements and is defined using the international nautical mile of exactly 1852 meters [nist-si-guide]. The knot originated from the practice of measuring speed at sea using a 'log line' with knots tied at regular intervals. The term and unit were standardized with the adoption of the international nautical mile in 1929 by the International Hydrographic Organization [nist-si-guide]. Knots are the standard speed unit in global maritime navigation and aviation. Countries and organizations like the International Maritime Organization (IMO) and International Civil Aviation Organization (ICAO) mandate its use for vessel and aircraft speed reporting [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: miles per hour, mile per hour, mi/h, mphs, knotz, knotses, knotss, knotts. All of these refer to the Miles per Hour to Knots conversion.