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120 knots to mph

Conversion formula

Firstly, the conversion factor from knots to miles per hour is 1.1507794480225, which means that 1 knot equals 1.1507794480225 miles per hour:

1 kt = 1.1507794480225 mph

To convert 120 knots to miles per hour, we need to multiply 120 by the conversion factor to get the amount of speed from knots to miles per hour. We can also create a simple ratio to calculate the result:

1 kt → 1.1507794480225 mph

120 kt → V (mph)

Solve the above quotient to get the speed of V in miles per hour:

V(mph) = 120 kt × 1.1507794480225 mph

V(mph) = 138.09353376271 mph

The end result is:

120 kt → 138.09353376271 mph

We conclude that 120 knots equals 138.09353376271 miles per hour:

120 knots = 138.09353376271 miles per hour

Alternative conversions

120 knots to mph

We can also convert using the inverse of the conversion factor. In this case, 1 mile per hour equals 0.0072414686825117 × 120 knots.

Another way says that 120 knots equals 1 ÷ 0.0072414686825117 miles per hour.

Approximate result

For practical purposes, we can round our final result to an approximate numerical value. Although, we can say that one hundred twenty knots is approximately one hundred thirty eight point zero nine four miles per hour:

120 kt ≅ 138.094 mph

Alternatively, one mile per hour is approximately zero point zero zero seven times one hundred twenty knots.

Conversion table

Knots to miles per hour chart

For quick reference, below is a conversion chart that you can use to convert from knots to miles per hour

knots (kt) miles per hour (mph)

121 knots

139.244 miles per hour

122 nodes

140.395 miles per hour

123 knots

141.546 miles per hour

124 nodes

142.697 miles per hour

125 knots

143.847 miles per hour

126 nodes

144.998 miles per hour

127 knots

146.149 miles per hour

128 nodes

147.3 miles per hour

129 nodes

148.451 miles per hour

130 knots

149.601 miles per hour

Conversion units

The units involved in this conversion are knots and miles per hour. They are defined as follows:


A knot is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. The ISO standard symbol for a node is kn. The same symbol is preferred by the IEEE; kt is also common. A knot is a non-SI unit that is “adopted for use with SI”. Globally, the knot is used in meteorology and in marine and air navigation – for example, a ship traveling at 1 knot along the meridian travels approximately one minute of latitude in one hour. Etymologically, the term derives from counting the number of knots in the fishing line that have been unwound from the spool of a log of chips in a given time.

Miles an hour

A mile per hour (abbreviated mph, MPH, or mi/h) is an imperial and United States customary unit of speed expressing the number of legal miles traveled in one hour. Although kilometers per hour are now the most widely used measure of speed, miles per hour remain the standard unit for speed limits in the United States, United Kingdom, Antigua and Barbuda, and Puerto Rico, although the latter two use kilometers for long distances.


Lastly, the 120 kn to mph conversion result above remain displayed in three different forms: as a decimal number, in scientific notation (scientific form, standard index form or UK standard form) and as a fraction (exact result). Each form of display has its advantages, and in different situations a particular form is more advantageous than another. For example, using scientific notation when working with large numbers remained recommended for easier reading and understanding. The use of fractions stood recommended when more precision remained needed.

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