With this information, you can calculate the quantity of feet per second 815 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 815 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.00072697399 times 815 knots.

Which is the same to say that 815 knots is 1375.565 feet per second.

Eight hundred fifteen knots equals to one thousand three hundred seventy-five feet per second. *Approximation

A foot per second is zero times eight hundred fifteen knots. *Approximation