Velocity
mphtokn
Convert miles per hour (mph) to knots (kn).
Factor1 mph = 0.8689762 kn
Converter
mph
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kn
Rendered to 6 significant figures.
Formula
Formula
kn = mph × 0.8689762
Multiply any value in miles per hour by 0.8689762 to obtain the value in knots.
Worked example
Convert 60 mph to kn.
- 01Start with 60 mph.
- 02Multiply by the conversion factor: 60 × 0.8689762 = 52.1386 kn.
Result60 mph = 52.1386 kn
Conversion table
| mph | kn |
|---|---|
| 1 | 0.86898 |
| 2 | 1.738 |
| 5 | 4.3449 |
| 10 | 8.6898 |
| 20 | 17.38 |
| 50 | 43.449 |
| 100 | 86.898 |
| 200 | 173.8 |
| 500 | 434.49 |
| 1000 | 868.98 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mph to kn?
1 mph equals 0.8689762 kn. To convert, multiply the value in miles per hour by 0.8689762.
How do I convert 1 mph to kn?
1 mph = 0.868976 kn. For any value, multiply by 0.8689762.
How do I convert kn back to mph?
Divide by the same factor — or equivalently, multiply by 1.150779. So 1 kn = 1.15078 mph.
When would I need to convert mile per hour to knot?
Velocity conversions are needed for fluid flow analysis (line velocity targets, erosional limits), gas-stream calculations, and equipment specs that mix m/s, ft/s and engineering speed units.
Is the conversion exact?
Yes. Both mph and kn are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).