How do you convert from knots to feet per second?

Answer 1

1 knot = 1 nautical mile per hour.

Technically 1 nautical mile was the distance subtended by 1 minute of arc along a line of longitude which means at different latitudes it has different lengths (as the earth is geoid in shape - a squashed sphere). However it has been internationally agreed to be set at 1,852 m exactly or approx 6,076 feet

To convert nmi/hr to ft/second, convert to feet/hour by multiplying by 6076 and then divide by 3600 as there are 3600 seconds in each hour:

ie multiply the knots by 1.68781 to get approx ft/s

Answer 2

Multiply the value in knots by 1.68 to get the approximate value in feet per second.