Knots to MPH Calculator

Convert knots to miles per hour for boating, aviation, wind reports, sailing logs, and weather discussions. The form has one input, Speed in Knots, and returns MPH rounded to two decimal places.

How to use this calculator

Enter the speed in knots. The calculator multiplies by the nautical-mile-to-statute-mile factor and displays the equivalent road-style speed in miles per hour. For other speed units, use the speed converter. For vertical flight or climb rates, the vertical speed calculator may be more relevant.

Conversion formula

One knot equals approximately 1.15078 miles per hour.

$mph = knots \times 1.15078$

For example, 20 knots is about 23.02 mph. To convert mph to knots, divide by 1.15078.

Worked example

A wind forecast of 15 knots converts as:

$15 \times 1.15078 = 17.2617$

The calculator displays 17.26 MPH.

Common values

Use the mph result for everyday comparison, but keep knots for charts, instruments, and navigation. If your speed is a running or cycling pace, try the pace converter instead.