21 feet per second in kilometers per hour

Result

The conversion result is: 21 feet per second is equivalent to 23.04288 kilometers per hour.^[1]

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer per hour is equal to 0.0433973531086392 times 21 feet per second.

It can also be expressed as: 21 feet per second is equal to 1 / 0.0433973531086392 kilometers per hour.

Approximation

An approximate numerical result would be: twenty-one feet per second is about twenty-three point zero three kilometers per hour, or alternatively, a kilometer per hour is about zero point zero four times twenty-one feet per second.