Miles per hour to Knots Converter (mph to kn)
Convert miles per hour to knots instantly with our free mph to kn calculator. Enter a value to see the result.
How to convert miles per hour to knots
To change mph into kn, use this formula:
Quick mental estimate: multiply by about 0.87.
Example: to convert 25 mph to kn, calculate 21.7244 kn. To go the other way, use mph = kn ÷ 0.868976.
Popular miles per hour to knots conversions
- 1 mph to kn = 0.868976 kn
- 2 mph to kn = 1.73795 kn
- 3 mph to kn = 2.60693 kn
- 5 mph to kn = 4.34488 kn
- 10 mph to kn = 8.68976 kn
- 15 mph to kn = 13.0346 kn
- 20 mph to kn = 17.3795 kn
- 25 mph to kn = 21.7244 kn
- 30 mph to kn = 26.0693 kn
- 40 mph to kn = 34.759 kn
- 50 mph to kn = 43.4488 kn
- 60 mph to kn = 52.1386 kn
- 70 mph to kn = 60.8283 kn
- 80 mph to kn = 69.5181 kn
- 90 mph to kn = 78.2079 kn
- 100 mph to kn = 86.8976 kn
Miles per hour to Knots conversion chart
| Miles per hour (mph) | Knots (kn) |
|---|---|
| 1 mph | 0.868976 kn |
| 2 mph | 1.73795 kn |
| 5 mph | 4.34488 kn |
| 10 mph | 8.68976 kn |
| 20 mph | 17.3795 kn |
| 25 mph | 21.7244 kn |
| 50 mph | 43.4488 kn |
| 75 mph | 65.1732 kn |
| 100 mph | 86.8976 kn |
| 250 mph | 217.244 kn |
| 500 mph | 434.488 kn |
| 1,000 mph | 868.976 kn |
When do you need mph to kn conversion?
This conversion is commonly used for driving, aviation, sailing and sports. Different countries and industries use different units, so converting miles per hour to knots helps you compare measurements accurately.
Frequently asked questions
How many knots are in 1 miles per hour?
1 mph equals 0.868976 kn.
How do I convert miles per hour to knots?
Use the formula kn = mph × 0.868976. For example, 25 mph = 21.7244 kn.
What is 10 mph in kn?
10 mph = 8.68976 kn.
What is 100 mph in kn?
100 mph = 86.8976 kn.
How do I convert kn back to mph?
Use mph = kn ÷ 0.868976. You can also use our Knots to Miles per hour converter.
Is this mph to kn converter accurate?
Yes. It uses standard international conversion factors and shows up to 6 significant digits.