Conversion formula

The conversion factor from kilometers per hour to feet per second is 0.91134441528215, which means that 1 kilometer per hour is equal to 0.91134441528215 feet per second:

1 km/h = 0.91134441528215 ft/s

To convert 640 kilometers per hour into feet per second we have to multiply 640 by the conversion factor in order to get the velocity amount from kilometers per hour to feet per second. We can also form a simple proportion to calculate the result:

1 km/h → 0.91134441528215 ft/s

640 km/h → V_(ft/s)

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

V_(ft/s) = 640 km/h × 0.91134441528215 ft/s

V_(ft/s) = 583.26042578058 ft/s

The final result is:

640 km/h → 583.26042578058 ft/s

We conclude that 640 kilometers per hour is equivalent to 583.26042578058 feet per second:

640 kilometers per hour = 583.26042578058 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 0.0017144999999986 × 640 kilometers per hour.

Another way is saying that 640 kilometers per hour is equal to 1 ÷ 0.0017144999999986 feet per second.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred forty kilometers per hour is approximately five hundred eighty-three point two six feet per second:

640 km/h ≅ 583.26 ft/s

An alternative is also that one foot per second is approximately zero point zero zero two times six hundred forty kilometers per hour.

Conversion table

kilometers per hour to feet per second chart

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