Knot to MPH Converter

Convert knots to miles per hour instantly with our precise speed converter. Perfect for marine navigation, aviation, and weather reporting.

Knots (kn)

Miles per Hour (mph)

1 knot = 1.151 mph

About Knots

A knot (kn) is a unit of speed equal to one nautical mile per hour. It's the standard unit for measuring speed in marine and aviation contexts worldwide.

1 knot = 1 nautical mile per hour

About Miles per Hour

Miles per hour (mph) is a unit of speed expressing the number of statute miles covered in one hour. It's commonly used for land transportation in the United States.

1 mph = 1 statute mile per hour

Common Knot to MPH Conversions

10 kn

11.5 mph

20 kn

23.0 mph

50 kn

57.5 mph

100 kn

115.1 mph

Speed Reference Guide

Marine Speeds

Sailing yacht (5 kn) 5.8 mph

Cruise ship (25 kn) 28.8 mph

Speedboat (40 kn) 46.0 mph

Naval vessel (30 kn) 34.5 mph

Aviation Speeds

Small aircraft (100 kn) 115.1 mph

Airliner cruise (450 kn) 518.0 mph

Helicopter (120 kn) 138.1 mph

Glider (50 kn) 57.5 mph

Nautical vs Statute Miles

Nautical Mile

• Length: 6,076 feet

• Based on Earth's circumference

• 1' of latitude = 1 nautical mile

• Used in marine and aviation

Statute Mile

• Length: 5,280 feet

• Historical land measurement

• Used in road transportation

• Common in United States

Beaufort Wind Scale Reference

Light breeze (4-7 kn) 4.6-8.1 mph

Moderate breeze (11-16 kn) 12.7-18.4 mph

Fresh breeze (17-21 kn) 19.6-24.2 mph

Strong breeze (22-27 kn) 25.3-31.1 mph

Gale (34-40 kn) 39.1-46.0 mph

Storm (48-55 kn) 55.2-63.3 mph

Common Applications

Marine Navigation

Boat speed, current calculations, and voyage planning

Aviation

Aircraft speed, wind calculations, and flight planning

Weather Reporting

Wind speed measurements and storm tracking

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