Knots to MPH Converter
Handy for boat speeds, hurricane wind speeds and aircraft speeds reported in knots.
1 kn = 1.1508 mph
miles per hour
1 kn = 1.1508 mph
How to convert knots to miles per hour
Multiply the number of knots by 1.1507794.
Formula
mph = kn × 1.1507794
The factor is rounded; the converter uses the full-precision value.
Examples
- 20 kn × 1.1507794 = 23.0156 mph
- 64 kn × 1.1507794 = 73.6499 mph
- 250 kn × 1.1507794 = 287.6949 mph
Knots to miles per hour conversion table
| Knots (kn) | Miles per hour (mph) |
|---|---|
| 1 | 1.1508 |
| 5 | 5.7539 |
| 10 | 11.5078 |
| 15 | 17.2617 |
| 20 | 23.0156 |
| 25 | 28.7695 |
| 30 | 34.5234 |
| 34 | 39.1265 |
| 40 | 46.0312 |
| 50 | 57.539 |
| 64 | 73.6499 |
| 100 | 115.0779 |
| 150 | 172.6169 |
| 250 | 287.6949 |
| 500 | 575.3897 |
Values rounded to 4 decimal places or 4 significant digits.
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.
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.
Frequently asked questions
How many miles per hour are in one knot?
One knot equals 1.1508 miles per hour (rounded).
How do I convert knots to miles per hour?
Multiply the number of knots by 1.1507794. For example: 64 kn × 1.1507794 = 73.6499 mph.
How many knots are in one mile per hour?
One mile per hour equals 0.869 knots.
Is the kn to mph 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.