Conversion formula

The conversion factor from feet per second to kilometers per hour is 1.0972799999991, which means that 1 foot per second is equal to 1.0972799999991 kilometers per hour:

1 ft/s = 1.0972799999991 km/h

To convert 400 feet per second into kilometers per hour we have to multiply 400 by the conversion factor in order to get the velocity amount from feet per second to kilometers per hour. We can also form a simple proportion to calculate the result:

1 ft/s → 1.0972799999991 km/h

400 ft/s → V_(km/h)

Solve the above proportion to obtain the velocity V in kilometers per hour:

V_(km/h) = 400 ft/s × 1.0972799999991 km/h

V_(km/h) = 438.91199999965 km/h

The final result is:

400 ft/s → 438.91199999965 km/h

We conclude that 400 feet per second is equivalent to 438.91199999965 kilometers per hour:

400 feet per second = 438.91199999965 kilometers per hour

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer per hour is equal to 0.0022783610382054 × 400 feet per second.

Another way is saying that 400 feet per second is equal to 1 ÷ 0.0022783610382054 kilometers per hour.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four hundred feet per second is approximately four hundred thirty-eight point nine one two kilometers per hour:

400 ft/s ≅ 438.912 km/h

An alternative is also that one kilometer per hour is approximately zero point zero zero two times four hundred feet per second.

Conversion table

feet per second to kilometers per hour chart

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