MPH to Knots Converter
Convert miles per hour to knots instantly. One mile per hour equals exactly 0.8689762 knots. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert miles per hour to knots
Worked example: convert 250 miles per hour to knots. Using knots ← miles per hour × 0.8689762419, we get 250 × 0.8689762419 = 217.24406 kn. To check the result, convert back: 217.24406 kn ÷ 0.8689762419 = 250 mph.
Miles per hour to knots chart
| Miles per hour (mph) | Knots (kn) |
|---|---|
| 1 mph | 0.8689762 kn |
| 2 mph | 1.737952 kn |
| 3 mph | 2.606929 kn |
| 4 mph | 3.475905 kn |
| 5 mph | 4.344881 kn |
| 6 mph | 5.213857 kn |
| 8 mph | 6.95181 kn |
| 10 mph | 8.689762 kn |
| 12 mph | 10.42771 kn |
| 15 mph | 13.03464 kn |
| 20 mph | 17.37952 kn |
| 25 mph | 21.72441 kn |
| 30 mph | 26.06929 kn |
| 40 mph | 34.75905 kn |
| 50 mph | 43.44881 kn |
| 75 mph | 65.17322 kn |
| 100 mph | 86.89762 kn |
| 150 mph | 130.3464 kn |
| 200 mph | 173.7952 kn |
| 250 mph | 217.2441 kn |
| 500 mph | 434.4881 kn |
| 1,000 mph | 868.9762 kn |
Knots to miles per hour (reverse)
| Knots (kn) | Miles per hour (mph) |
|---|---|
| 1 kn | 1.150779 mph |
| 2 kn | 2.301559 mph |
| 5 kn | 5.753897 mph |
| 10 kn | 11.50779 mph |
| 20 kn | 23.01559 mph |
| 50 kn | 57.53897 mph |
| 100 kn | 115.0779 mph |
| 250 kn | 287.6949 mph |
| 500 kn | 575.3897 mph |
| 1,000 kn | 1,150.779 mph |
About the mile per hour and the knot
Miles per hour is the speed unit on road signs and speedometers in the United States and United Kingdom.
A knot is one nautical mile per hour. Ships, aircraft and weather services use knots for speed and wind speed.
One knot equals 1.150779 miles per hour, which makes the knot the faster unit of the two.
Everyday sizes in miles per hour and knots
| Everyday example (approximate) | In miles per hour | In knots |
|---|---|---|
| A slow walk | 3.1317 mph | 2.7214 kn |
| A jogger | 6.7108 mph | 5.8315 kn |
| A city cyclist | 12.303 mph | 10.691 kn |
| Usain Bolt's peak sprint speed | 27.738 mph | 24.104 kn |
| A car on a city road | 31.071 mph | 27 kn |
| A car on a highway | 62.142 mph | 54 kn |
Miles per hour to knots FAQ
How many knots are in one mile per hour?
One mile per hour equals exactly 0.8689762419 knots. In the other direction, one knot equals 1.1507794 miles per hour.
How do I convert miles per hour to knots without a calculator?
convert 250 miles per hour to knots. Using knots ← miles per hour × 0.8689762419, we get 250 × 0.8689762419 = 217.24406 kn. To check the result, convert back: 217.24406 kn ÷ 0.8689762419 = 250 mph. For a quick estimate, round the factor to 0.87. Then 250 mph is about 217.5 kn, compared with the exact 217.244 kn (an error of 0.12%). That is close enough for planning, but use the calculator above when the number matters.
What is a city cyclist in knots?
A city cyclist is about 12.303 miles per hour, which is 10.691 knots. Treat that as an approximate everyday figure rather than an official measurement.
Are the miles per hour and knots the same in every country?
One mile per hour is exactly 0.44704 m/s. One knot is exactly 1.852 km/h (1 nautical mile per hour).