Knots to MPH Calculator
Convert knots to mph or mph to knots for boating, aviation, or wind speeds. Enter a value below for instant knots to mph results.
to
0 MPH
Quick Conversion Table
| Knots | MPH | km/h | m/s |
|---|---|---|---|
| 5 | 5.75 | 9.26 | 2.57 |
| 10 | 11.51 | 18.52 | 5.14 |
| 15 | 17.26 | 27.78 | 7.72 |
| 20 | 23.02 | 37.04 | 10.29 |
| 25 | 28.77 | 46.30 | 12.86 |
| 30 | 34.52 | 55.56 | 15.43 |
| 40 | 46.03 | 74.08 | 20.58 |
| 50 | 57.54 | 92.60 | 25.72 |
40 Knots to MPH Example
Start with 40 knots. Multiply by 1.150779 to get 46.03 mph. This matches boating speeds or strong winds.
Wind Speed Chart (Beaufort Scale)
| Description | Range (MPH) | Knots |
|---|---|---|
| Light breeze | 4-7 | 4-6 |
| Gentle breeze | 8-12 | 7-10 |
| Moderate breeze | 13-18 | 11-16 |
| Strong breeze | 25-31 | 22-27 |
| Moderate gale | 32-38 | 28-33 |
| Whole gale | 55-63 | 48-55 |
Convert to Other Units
km/h: 0
m/s: 0
ft/s: 0
Frequently Asked Questions
How many mph is 50 knots? 50 knots equals 57.54 mph, common for gale-force winds.
Why use knots for boats? Knots match nautical miles (1 minute of latitude), ideal for charts and GPS.
12 knots in mph? 12 knots is 13.81 mph, typical light boating speed.