## 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 3.5 feet per second into kilometers per hour we have to multiply 3.5 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

3.5 ft/s → V(km/h)

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

V(km/h) = 3.5 ft/s × 1.0972799999991 km/h

V(km/h) = 3.8404799999969 km/h

The final result is:

3.5 ft/s → 3.8404799999969 km/h

We conclude that 3.5 feet per second is equivalent to 3.8404799999969 kilometers per hour:

3.5 feet per second = 3.8404799999969 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 0.26038411865204 × 3.5 feet per second.

Another way is saying that 3.5 feet per second is equal to 1 ÷ 0.26038411865204 kilometers per hour.

## Approximate result

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

3.5 ft/s ≅ 3.84 km/h

An alternative is also that one kilometer per hour is approximately zero point two six times three point five 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)
4.5 feet per second 4.938 kilometers per hour
5.5 feet per second 6.035 kilometers per hour
6.5 feet per second 7.132 kilometers per hour
7.5 feet per second 8.23 kilometers per hour
8.5 feet per second 9.327 kilometers per hour
9.5 feet per second 10.424 kilometers per hour
10.5 feet per second 11.521 kilometers per hour
11.5 feet per second 12.619 kilometers per hour
12.5 feet per second 13.716 kilometers per hour
13.5 feet per second 14.813 kilometers per hour