A knot is one nautical mile per hour. One nautical mile equals 1,852 meters (or about 1.15078 statute miles), so 1 knot ≈ 1.15078 MPH or 1.852 km/h. The unit is the international standard for maritime and aviation speeds.

How do I convert knots to MPH?

Multiply the speed in knots by 1.15078. For example, 20 knots × 1.15078 = 23.0 MPH. This converter does the calculation instantly for any value you enter.

What is the Beaufort scale?

The Beaufort scale (officially the Beaufort wind force scale) runs from Force 0 (calm, under 1 knot) to Force 12 (hurricane, 64 knots or above). Each force band has a name, a wind speed range in knots, and a description of sea conditions. It was devised by Admiral Sir Francis Beaufort in 1805.

What Beaufort force is 30 knots?

30 knots falls in Beaufort Force 7 (Near Gale), which corresponds to 28–33 knots or 32–38 MPH. Sea conditions include moderately high waves and streaks of foam blown along the surface.

Can I convert MPH back to knots?

Yes. Divide the speed in MPH by 1.15078, or use the reverse input field in this tool. For km/h, divide by 1.852 to get knots.

Are knots used in aviation too?

Yes. Knots are the standard unit for airspeed, wind speed, and altitude (in nautical miles) in commercial and general aviation worldwide, just as they are at sea.

Knots to MPH Converter

Name: Knots to MPH Converter
Availability: InStock
Author: Nham Vu

Enter a speed in knots to instantly see the equivalent in MPH, km/h, m/s, ft/s, and the Beaufort wind scale classification.

Enter Speed

Knots (kn)

Reverse Convert

Miles per hour (MPH)

Kilometers per hour (km/h)

Conversion Results

Enter a speed on the left to see results.

Beaufort Wind Scale

Force	Name	Knots	MPH	Sea State

Summary