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 221 feet per second into kilometers per hour we have to multiply 221 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

221 ft/s → V_(km/h)

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

V_(km/h) = 221 ft/s × 1.0972799999991 km/h

V_(km/h) = 242.49887999981 km/h

The final result is:

221 ft/s → 242.49887999981 km/h

We conclude that 221 feet per second is equivalent to 242.49887999981 kilometers per hour:

221 feet per second = 242.49887999981 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 0.0041237303858921 × 221 feet per second.

Another way is saying that 221 feet per second is equal to 1 ÷ 0.0041237303858921 kilometers per hour.

Approximate result

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

221 ft/s ≅ 242.499 km/h

An alternative is also that one kilometer per hour is approximately zero point zero zero four times two hundred twenty-one 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