With this information, you can calculate the quantity of feet per second 687 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 687 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.00086242184 times 687 knots.

Which is the same to say that 687 knots is 1159.5254 feet per second.

Six hundred eighty-seven knots equals to one thousand one hundred fifty-nine feet per second. *Approximation

A foot per second is zero times six hundred eighty-seven knots. *Approximation