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 421.9 knots into feet per second we have to multiply 421.9 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

421.9 kt → V_(ft/s)

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

V_(ft/s) = 421.9 kt × 1.6878098570997 ft/s

V_(ft/s) = 712.08697871038 ft/s

The final result is:

421.9 kt → 712.08697871038 ft/s

We conclude that 421.9 knots is equivalent to 712.08697871038 feet per second:

421.9 knots = 712.08697871038 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 0.0014043228283868 × 421.9 knots.

Another way is saying that 421.9 knots is equal to 1 ÷ 0.0014043228283868 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 point nine knots is approximately seven hundred twelve point zero eight seven feet per second:

421.9 kt ≅ 712.087 ft/s

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