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 321 feet per second into kilometers per hour we have to multiply 321 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

321 ft/s → V_(km/h)

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

V_(km/h) = 321 ft/s × 1.0972799999991 km/h

V_(km/h) = 352.22687999972 km/h

The final result is:

321 ft/s → 352.22687999972 km/h

We conclude that 321 feet per second is equivalent to 352.22687999972 kilometers per hour:

321 feet per second = 352.22687999972 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 0.0028390791753338 × 321 feet per second.

Another way is saying that 321 feet per second is equal to 1 ÷ 0.0028390791753338 kilometers per hour.

Approximate result

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

321 ft/s ≅ 352.227 km/h

An alternative is also that one kilometer per hour is approximately zero point zero zero three times three 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