With this information, you can calculate the quantity of meters per second 661 knots is equal to.

¿What is the inverse calculation between 1 meter per second and 661 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 meter per second is 0.0029407632 times 661 knots.

Which is the same to say that 661 knots is 340.04778 meters per second.

Six hundred sixty-one knots equals to three hundred forty meters per second. *Approximation

A meter per second is zero times six hundred sixty-one knots. *Approximation