Convert miles per hour to knots instantly. Enter a value below, or use the formula and reference table further down the page.
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How to convert miles per hour to knots
Multiply the value by 0.8689762419.
kn = mph × 0.8689762419Example: 10 mph = 8.6898 kn.
Miles per hour to Knots conversion table
| Miles per hour (mph) | Knots (kn) |
|---|---|
| 1 mph | 0.869 kn |
| 2 mph | 1.738 kn |
| 3 mph | 2.6069 kn |
| 4 mph | 3.4759 kn |
| 5 mph | 4.3449 kn |
| 10 mph | 8.6898 kn |
| 15 mph | 13.0346 kn |
| 20 mph | 17.3795 kn |
| 25 mph | 21.7244 kn |
| 50 mph | 43.4488 kn |
| 100 mph | 86.8976 kn |
Frequently asked questions
How many knots is 1 mph?
1 mph equals 0.869 knots.
What is the formula to convert mph to kn?
To convert mph to kn, multiply the value by 0.8689762419. The full formula is: kn = mph × 0.8689762419.
How do I convert knots back to miles per hour?
Use the same calculator above and type your value into the knots field instead — it converts in both directions. Or use the reverse formula: mph = kn ÷ 0.8689762419.
Is the mph to kn conversion exact?
The conversion factor used here (0.8689762419) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.