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21 Mph to Knots

Welcome to 21 mph to knots, our post about the 21 miles per hour to knots conversion. 21 mph essentially stand for 21 international miles per hour, used, for instance, to denote road traffic speed. 21 miles per hour are usually abbreviated as 21 mph, yet you perhaps also come across the symbol mi/h. Right below you can see the result of the conversion:



This Knots ⇄ Miles per Hour Converter is Really Cool! Click To TweetYou may overwrite 21 with another speed in (international) miles per hour and watch how our tools changes the value automatically to knots.

If you like our converter, then bookmark it now. In the next section we discuss the math.

Conversion and Formula

To convert 21 mph to knots multiply the speed by 1609.344 / 1852.

The formula goes like this: [kts] = [21] x (1609.344 / 1852).

Thus, the result rounded to 2 decimal places is: 18.25 knots.

Here you can find the opposite, 21 knots to mph.

Some of the other frequently searched miles per hour to knots speed conversions on our site include:

Comments or questions about this conversion are really welcomed!

In the next section we have additional information in the context.

21 Miles per Hour to Knots

As you know, 21 miles per hour to knots is 18.25 knots. In other words, 21 international miles an hour are equal to 18.25 nautical miles per hour.

If you have been looking for 21 mph to kts, then you have gotten the answer, too.

Further information regarding the units under consideration can be located in the articles placed in the menu. Here you can learn all about 21 kmh to knots.

Ahead is the summary of our content.


By having made it so far, you know 21 mph in knots inside out.Note that you can locate many conversions using our search form. Insert for example, how fast is 21 mph? The result page contains all relevant results.

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– Article written by Mark