How Fast Is 21 Knots

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in Miles Per Hour

21 knots is approximately 24.2 miles per hour.

Knots, often symbolized by the letter “k”, are a unit of speed used to measure the speed of a ship or aircraft. One knot is equal to one nautical mile, or 1.15 statute miles per hour, which is equal to 1.852 kilometers per hour. To convert knots to miles per hour, the equation is Multiply the speed in knots by 1.15.

Therefore, 21 knots is equal to 24.2 miles per hour (21 x 1.15 = 24.2).

In terms of transportation, 21 knots is considered a fast speed. This is because the average speed of a commercial airliner is around 400 knots (460 miles per hour) and the speed of sound is 767 knots (880 miles per hour).

To give some perspective, 21 knots is faster than the mean speed of a car at highway speed, which an average of about 270-300 km/h, or about 69-80 knots. It is also fast enough to outrun a category 4 (F4) hurricane, which has an average speed of 73 knots, or 84 miles per hour.

In summary, 21 knots is equal to 24.2 miles per hour, making it a fast speed in the world of transportation and fast enough to outrun most storms.