With this information, you can calculate the quantity of meters per second 21 knots is equal to.

¿What is the inverse calculation between 1 meter per second and 21 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 meter per second is 0.092564023 times 21 knots.

Which is the same to say that 21 knots is 10.803333 meters per second.

Twenty-one knots equals to ten meters per second. *Approximation

A meter per second is zero times twenty-one knots. *Approximation