With this information, you can calculate the quantity of feet per minute 138 knots is equal to.

¿What is the inverse calculation between 1 foot per minute and 138 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per minute is 7.1556015e-05 times 138 knots.

Which is the same to say that 138 knots is 13975.066 feet per minute.

One hundred thirty-eight knots equals to thirteen thousand nine hundred seventy-five feet per minute. *Approximation

A foot per minute is seven times one hundred thirty-eight knots. *Approximation