Conversion formula

The conversion factor from feet per second to knots is 0.59248380129641, which means that 1 foot per second is equal to 0.59248380129641 knots:

1 ft/s = 0.59248380129641 kt

To convert 421.5 feet per second into knots we have to multiply 421.5 by the conversion factor in order to get the velocity amount from feet per second to knots. We can also form a simple proportion to calculate the result:

1 ft/s → 0.59248380129641 kt

421.5 ft/s → V_(kt)

Solve the above proportion to obtain the velocity V in knots:

V_(kt) = 421.5 ft/s × 0.59248380129641 kt

V_(kt) = 249.73192224644 kt

The final result is:

421.5 ft/s → 249.73192224644 kt

We conclude that 421.5 feet per second is equivalent to 249.73192224644 knots:

421.5 feet per second = 249.73192224644 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.004004293848398 × 421.5 feet per second.

Another way is saying that 421.5 feet per second is equal to 1 ÷ 0.004004293848398 knots.

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 five feet per second is approximately two hundred forty-nine point seven three two knots:

421.5 ft/s ≅ 249.732 kt

An alternative is also that one knot is approximately zero point zero zero four times four hundred twenty-one point five feet per second.

Conversion table

feet per second to knots chart

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