You can easily convert 21 knots into miles per hour using each unit definition:
- Knots
- nauticalmile / hr = 0.51444444 m / s
- Miles per hour
- mile/hr = 0.44704 m / s
With this information, you can calculate the quantity of miles per hour 21 knots is equal to.
¿How many mph are there in 21 kn?
In 21 kn there are 24.166368 mph.
Which is the same to say that 21 knots is 24.166368 miles per hour.
Twenty-one knots equals to twenty-four miles per hour. *Approximation
¿What is the inverse calculation between 1 mile per hour and 21 knots?
Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 0.041379821 times 21 knots.
A mile per hour is zero times twenty-one knots. *Approximation
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