Knot to Mile per Hour Conversion

Convert between Knot and Mile per Hour quickly and accurately.

kt
mph

How to Convert Knot to Mile per Hour

Conversion Formula

1 kt = 1.151 mph
1 mph = 0.869 kt

Example

Convert 15 kt to mph:

15 kt = 15 × 1.151 mph = 17.262 mph

Unit Information

Learn about the speed units you're converting between

Knot

kt

Definition

The knot is a unit of speed used in maritime and aviation contexts, representing one nautical mile per hour. It is the standard unit for measuring ship speeds, aircraft speeds, and wind speeds in navigation and meteorology worldwide.

History/Origin

The knot has its origins in maritime navigation, where sailors used a rope with knots tied at regular intervals to measure ship speed. The term "knot" comes from this practice, and it became the standard unit for maritime and aviation speeds.

Current Use

The knot is used worldwide in maritime navigation for ship speeds, in aviation for aircraft speeds, in meteorology for wind speeds, and in various navigation applications. It is the standard unit in these fields regardless of the country's measurement system.

Multiplier

0.514

Offset

0

Mile per Hour

mph

Definition

The mile per hour is a unit of speed expressing the number of statute miles traveled in one hour. It is primarily used in the United States, United Kingdom, and other countries that have not fully adopted the metric system for everyday measurements.

History/Origin

Mile per hour has its origins in the British Imperial system and was widely used in the British Empire. It became the standard speed unit in the United States and remains the primary unit for road traffic, aviation, and weather reporting in these countries.

Current Use

Mile per hour is used for speed limits, speedometers, weather reports, and aviation in the US, UK, and other imperial system countries. It is also commonly used in sports, particularly in motorsports and athletics in these regions.

Multiplier

0.447

Offset

0

Knot to Mile per Hour Conversion Table

Knot [kt] Mile per Hour [mph]
1 kt 1.150779 mph
10 kt 11.507794 mph
25 kt 28.769486 mph
50 kt 57.538972 mph
100 kt 115.077945 mph
0 kt 0E+0 mph
-10 kt -11.507794 mph
-40 kt -46.031178 mph