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 4221 kilometers per hour into feet per second we have to multiply 4221 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

4221 km/h → V_(ft/s)

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

V_(ft/s) = 4221 km/h × 0.91134441528215 ft/s

V_(ft/s) = 3846.784776906 ft/s

The final result is:

4221 km/h → 3846.784776906 ft/s

We conclude that 4221 kilometers per hour is equivalent to 3846.784776906 feet per second:

4221 kilometers per hour = 3846.784776906 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 0.00025995735607655 × 4221 kilometers per hour.

Another way is saying that 4221 kilometers per hour is equal to 1 ÷ 0.00025995735607655 feet per second.

Approximate result

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

4221 km/h ≅ 3846.785 ft/s

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