Conversion formula

The conversion factor from knots to feet per second is 1.6878098570997, which means that 1 knot is equal to 1.6878098570997 feet per second:

1 kt = 1.6878098570997 ft/s

To convert 421 knots into feet per second we have to multiply 421 by the conversion factor in order to get the velocity amount from knots to feet per second. We can also form a simple proportion to calculate the result:

1 kt → 1.6878098570997 ft/s

421 kt → V_(ft/s)

Solve the above proportion to obtain the velocity V in feet per second:

V_(ft/s) = 421 kt × 1.6878098570997 ft/s

V_(ft/s) = 710.56794983899 ft/s

The final result is:

421 kt → 710.56794983899 ft/s

We conclude that 421 knots is equivalent to 710.56794983899 feet per second:

421 knots = 710.56794983899 feet per second

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 foot per second is equal to 0.0014073249436969 × 421 knots.

Another way is saying that 421 knots is equal to 1 ÷ 0.0014073249436969 feet per second.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four hundred twenty-one knots is approximately seven hundred ten point five six eight feet per second:

421 kt ≅ 710.568 ft/s

An alternative is also that one foot per second is approximately zero point zero zero one times four hundred twenty-one knots.

Conversion table

knots to feet per second chart

For quick reference purposes, below is the conversion table you can use to convert from knots to feet per second