How many kilometers per hour in 138 knots?

Conversion formula

The conversion factor from knots to kilometers per hour is 1.8519999999969, which means that 1 knot is equal to 1.8519999999969 kilometers per hour:

1 kt = 1.8519999999969 km/h

To convert 138 knots into kilometers per hour we have to multiply 138 by the conversion factor in order to get the velocity amount from knots to kilometers per hour. We can also form a simple proportion to calculate the result:

1 kt → 1.8519999999969 km/h

138 kt → V_(km/h)

Solve the above proportion to obtain the velocity V in kilometers per hour:

V_(km/h) = 138 kt × 1.8519999999969 km/h

V_(km/h) = 255.57599999957 km/h

The final result is:

138 kt → 255.57599999957 km/h

We conclude that 138 knots is equivalent to 255.57599999957 kilometers per hour:

138 knots = 255.57599999957 kilometers per hour

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer per hour is equal to 0.0039127304598306 × 138 knots.

Another way is saying that 138 knots is equal to 1 ÷ 0.0039127304598306 kilometers per hour.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one hundred thirty-eight knots is approximately two hundred fifty-five point five seven six kilometers per hour:

138 kt ≅ 255.576 km/h

An alternative is also that one kilometer per hour is approximately zero point zero zero four times one hundred thirty-eight knots.

Conversion table

knots to kilometers per hour chart

For quick reference purposes, below is the conversion table you can use to convert from knots to kilometers per hour

knots (kt)	kilometers per hour (km/h)
139 knots	257.428 kilometers per hour
140 knots	259.28 kilometers per hour
141 knots	261.132 kilometers per hour
142 knots	262.984 kilometers per hour
143 knots	264.836 kilometers per hour
144 knots	266.688 kilometers per hour
145 knots	268.54 kilometers per hour
146 knots	270.392 kilometers per hour
147 knots	272.244 kilometers per hour
148 knots	274.096 kilometers per hour

Conversion units

The units involved in this conversion are knots and kilometers per hour. This is how they are defined:

Knot

The 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 the knot is kn. The same symbol is preferred by the IEEE; kt is also common. The knot is a non-SI unit that is "accepted for use with the SI". Worldwide, the knot is used in meteorology, and in maritime and air navigation—for example, a vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour. Etymologically, the term derives from counting the number of knots in the line that unspooled from the reel of a chip log in a specific time.

Source: Wikipedia Topic: knot

Kilometer per hour

The kilometre per hour (American English: kilometer per hour) is a unit of speed, expressing the number of kilometres travelled in one hour. The unit symbol is km/h. Worldwide, it is the most commonly used unit of speed on road signs and car speedometers. Although the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use – the myriametre (10,000 metres) and myriametre per hour were preferred to kilometres and kilometres per hour.

Source: Wikipedia Topic: kilometer per hour