How to convert miles per hour to knots
Miles per Hour and Knots both measure speed, so converting is a single multiplication. One mph equals 0.868977 kn, so you multiply your miles per hour value by 0.868977.
Formula: knots = miles per hour × 0.868977. For example, 10 mph = 8.68977 kn.
Miles per Hour to Knots conversion table
| Miles per Hour (mph) | Knots (kn) |
|---|---|
| 1 | 0.868977 |
| 2 | 1.737954 |
| 5 | 4.344885 |
| 10 | 8.68977 |
| 25 | 21.724425 |
| 50 | 43.44885 |
| 100 | 86.897699 |
| 1,000 | 868.976993 |
Miles per Hour and Knots explained
Miles per Hour (mph): The imperial speed unit for vehicles in the US and UK.
Knots (kn): One nautical mile per hour, used in aviation and shipping.
When you'd convert miles per hour to knots
You'll convert miles per hour to knots whenever a measurement is given in one unit but you need it in the other — comparing miles per hour and knots figures across regions, following a recipe or spec, or double-checking a number. Because 1 mph is exactly 0.868977 kn, the result is precise every time.
Frequently asked questions
How many knots are in a miles per hour?
One mph equals 0.868977 kn. Multiply your miles per hour figure by 0.868977 to get knots.
What is the formula to convert miles per hour to knots?
knots = miles per hour × 0.868977. The factor 0.868977 is exact.
What is 2 miles per hour in knots?
2 mph = 1.737954 kn. You can enter any value in the converter above to get an instant result.
Is this Miles per Hour to Knots converter accurate?
Yes. It uses the standard conversion factor (1 mph = 0.868977 kn) defined by BIPM — SI Brochure (derived units), so results are exact to several decimal places.