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 8421 feet per second into knots we have to multiply 8421 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

8421 ft/s → V_(kt)

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

V_(kt) = 8421 ft/s × 0.59248380129641 kt

V_(kt) = 4989.3060907171 kt

The final result is:

8421 ft/s → 4989.3060907171 kt

We conclude that 8421 feet per second is equivalent to 4989.3060907171 knots:

8421 feet per second = 4989.3060907171 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0002004286732098 × 8421 feet per second.

Another way is saying that 8421 feet per second is equal to 1 ÷ 0.0002004286732098 knots.

Approximate result

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

8421 ft/s ≅ 4989.306 kt

An alternative is also that one knot is approximately zero times eight thousand four hundred twenty-one 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