## 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 21.9 feet per second into kilometers per hour we have to multiply 21.9 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

21.9 ft/s → V(km/h)

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

V(km/h) = 21.9 ft/s × 1.0972799999991 km/h

V(km/h) = 24.030431999981 km/h

The final result is:

21.9 ft/s → 24.030431999981 km/h

We conclude that 21.9 feet per second is equivalent to 24.030431999981 kilometers per hour:

21.9 feet per second = 24.030431999981 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 0.041613900241194 × 21.9 feet per second.

Another way is saying that 21.9 feet per second is equal to 1 ÷ 0.041613900241194 kilometers per hour.

## Approximate result

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

21.9 ft/s ≅ 24.03 km/h

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

feet per second (ft/s) kilometers per hour (km/h)
22.9 feet per second 25.128 kilometers per hour
23.9 feet per second 26.225 kilometers per hour
24.9 feet per second 27.322 kilometers per hour
25.9 feet per second 28.42 kilometers per hour
26.9 feet per second 29.517 kilometers per hour
27.9 feet per second 30.614 kilometers per hour
28.9 feet per second 31.711 kilometers per hour
29.9 feet per second 32.809 kilometers per hour
30.9 feet per second 33.906 kilometers per hour
31.9 feet per second 35.003 kilometers per hour