How to convert miles per hour to knots
kn = mph × 0.8689762419
Example: 5 mph × 0.8689762419 = 4.34488121 kn
Miles per Hour to Knots table
| Miles per Hour (mph) | Knots (kn) |
|---|---|
| 0.5 mph | 0.43448812 kn |
| 1 mph | 0.86897624 kn |
| 2 mph | 1.7379525 kn |
| 3 mph | 2.6069287 kn |
| 4 mph | 3.475905 kn |
| 5 mph | 4.3448812 kn |
| 6 mph | 5.2138575 kn |
| 7 mph | 6.0828337 kn |
| 8 mph | 6.9518099 kn |
| 9 mph | 7.8207862 kn |
| 10 mph | 8.6897624 kn |
| 15 mph | 13.034644 kn |
| 20 mph | 17.379525 kn |
| 25 mph | 21.724406 kn |
| 30 mph | 26.069287 kn |
| 40 mph | 34.75905 kn |
| 50 mph | 43.448812 kn |
| 75 mph | 65.173218 kn |
| 100 mph | 86.897624 kn |
| 250 mph | 217.24406 kn |
| 500 mph | 434.48812 kn |
| 1,000 mph | 868.97624 kn |
About these units
Miles per Hour (mph): Miles per hour (mph) is used for road speeds in the US and UK. 1 mph is exactly 1.609344 km/h.
Knots (kn): A knot is one nautical mile per hour, exactly 1.852 km/h. Ships, aircraft and wind speeds at sea use knots.
Frequently asked questions
How many knots are in 1 mile per hour?
1 mile per hour (mph) equals 0.8689762419 knots.
How do I convert mph to kn?
Multiply the value in miles per hour by 0.8689762419. For example, 5 mph × 0.8689762419 = 4.34488121 kn.
How do I convert knots back to miles per hour?
Multiply by 1.150779448 (or divide by 0.8689762419). 1 kn = 1.150779448 mph.
What does mph mean?
Miles per hour (mph) is used for road speeds in the US and UK. 1 mph is exactly 1.609344 km/h.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every speed unit at once? Use the Speed Converter.