MPH to Knots Converter
Converts land speeds and wind speeds in miles per hour into knots for marine and aviation use.
1 mph = 0.869 kn
knots
1 mph = 0.869 kn
How to convert miles per hour to knots
Multiply the number of miles per hour by 0.86897624.
Formula
kn = mph × 0.86897624
The factor is rounded; the converter uses the full-precision value.
Examples
- 39 mph × 0.86897624 = 33.8901 kn
- 74 mph × 0.86897624 = 64.3042 kn
- 150 mph × 0.86897624 = 130.3464 kn
Miles per hour to knots conversion table
| Miles per hour (mph) | Knots (kn) |
|---|---|
| 1 | 0.869 |
| 5 | 4.3449 |
| 10 | 8.6898 |
| 20 | 17.3795 |
| 30 | 26.0693 |
| 39 | 33.8901 |
| 40 | 34.759 |
| 50 | 43.4488 |
| 60 | 52.1386 |
| 74 | 64.3042 |
| 100 | 86.8976 |
| 150 | 130.3464 |
| 200 | 173.7952 |
| 500 | 434.4881 |
Values rounded to 4 decimal places or 4 significant digits.
About miles per hour
Miles per hour is the road speed unit in the US and the UK. One mile per hour is exactly 1.609344 km/h.
About knots
A knot is one nautical mile (1,852 m) per hour, exactly 1.852 km/h. Ships, aircraft and marine weather forecasts use knots.
Frequently asked questions
How many knots are in one mile per hour?
One mile per hour equals 0.869 knots (rounded).
How do I convert miles per hour to knots?
Multiply the number of miles per hour by 0.86897624. For example: 74 mph × 0.86897624 = 64.3042 kn.
How many miles per hour are in one knot?
One knot equals 1.1508 miles per hour.
Is the mph to kn conversion exact?
The factor between these units has more decimals than are useful to show, so it is rounded on this page. The converter itself always calculates with the full-precision value.