How Fast Is A Knot? + Conversion Table Knots To MPH & KMP



Knots are a unit of speed commonly used in maritime and aviation contexts, yet many are unfamiliar with how fast a knot is compared to more widely used measurements like miles or kilometers per hour. This article demystifies knots, explaining their speed, historical origins, and how they compare to other speed units.

How Fast Is A Knot?

A knot equals one nautical mile per hour. A nautical mile, measuring the distance between two points of latitude, is approximately 1.15 statute miles or precisely 1.15078 miles.

To convert knots to miles per hour, multiply by 1.15. For example, a ship traveling at 20 knots is moving at about 23 MPH.

Knots (KN) are the standard speed measurement in maritime and aviation due to their direct relation to the Earth’s geography, crucial for accurate navigation.

How Fast Is A Knot? This unit is used as a measurement of speed on ships and equals 1.15 statute miles.

Standard cruise ships move at speeds between 21 and 23 knots, which translates to about 24 to 26 miles per hour using the conversion method mentioned. This demonstrates the close relationship between knots and miles per hour, making knots a practical unit of speed for maritime and aviation purposes.

Why Is The Term Knots Used?

The term ‘knots’ has its origins in the 17th century, used by sailors to estimate their speed using a log and rope marked at intervals. This method evolved into the modern measurement of nautical miles per hour. Despite historical variations, knots have become standardized for maritime and aviation use, offering a direct link to the Earth’s geographical measurements and remaining essential for precise navigation.

Knots provide a specific speed measurement related to nautical miles, which are more relevant than standard miles when traveling by sea. This historical measurement method has been standardized in nations like the UK and the US in the 20th century, with the US adopting it in 1954 and the UK in 1970.

Conversion Table For Knots To Miles Per Hour (MPH) And Kilometers Per Hour (KMH)

Understanding the conversion between knots, miles per hour, and kilometers per hour is vital for navigators and enthusiasts alike. Below is a table that simplifies these conversions, making it easy to understand and apply in practical scenarios.

KnotsMiles Per HourKilometers Per Hour
1 Knot1,15 mph1,85 kmh
2 Knots2,30 mph3,70 kmh
3 Knots3,45 mph5,56 kmh
4 Knots4,60 mph7,41 kmh
5 Knots5,75 mph9,26 kmh
10 Knots11,51 mph18,52 kmh
15 Knots17,26 mph27,78 kmh
20 Knots23,02 mph37,04 kmh
25 Knots28,77 mph46,30 kmh
30 Knots34,52 mph55,56 kmh
35 Knots40,28 mph64,82 kmh
40 Knots46,03 mph74,08 kmh
45 Knots51,79 mph83,34 kmh
50 Knots57,54 mph92,60 kmh
60 Knots69,05 mph111,12 kmh
70 Knots80,55 mph129,64 kmh
80 Knots92,06 mph148,16 kmh
90 Knots103,57 mph166,68 kmh
100 Knots115,08 mph185,20 kmh
110 Knots126,59 mph203,72 kmh
120 Knots138,09 mph222,24 kmh
130 Knots149,60 mph240,76 kmh
140 Knots161,11 mph259,28 kmh
150 Knots172,62 mph277,80 kmh
160 Knots184,12 mph296,32 kmh
170 Knots195,63 mph314,84 kmh
180 Knots207,14 mph333,36 kmh
190 Knots218,65 mph351,88 kmh
200 Knots230,16 mph370,40 kmh

Note: These conversions are approximate and based on the conversion factor of 1 knot = 1.15 MPH or 1.85 KMH.


Knots, a unit of speed deeply rooted in maritime and aviation history, remain a crucial measurement for navigating the seas and skies. By understanding how knots compare to miles and kilometers per hour, one can better appreciate the precision and tradition behind this unit of speed. Whether you’re a seasoned sailor, a pilot, or simply curious about nautical terms, knowing about knots is an essential part of maritime and aviation knowledge.

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