## 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 609 feet per second into kilometers per hour we have to multiply 609 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

609 ft/s → V(km/h)

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

V(km/h) = 609 ft/s × 1.0972799999991 km/h

V(km/h) = 668.24351999947 km/h

The final result is:

609 ft/s → 668.24351999947 km/h

We conclude that 609 feet per second is equivalent to 668.24351999947 kilometers per hour:

609 feet per second = 668.24351999947 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 0.0014964604520232 × 609 feet per second.

Another way is saying that 609 feet per second is equal to 1 ÷ 0.0014964604520232 kilometers per hour.

## Approximate result

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

609 ft/s ≅ 668.244 km/h

An alternative is also that one kilometer per hour is approximately zero point zero zero one times six hundred 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)
610 feet per second 669.341 kilometers per hour
611 feet per second 670.438 kilometers per hour
612 feet per second 671.535 kilometers per hour
613 feet per second 672.633 kilometers per hour
614 feet per second 673.73 kilometers per hour
615 feet per second 674.827 kilometers per hour
616 feet per second 675.924 kilometers per hour
617 feet per second 677.022 kilometers per hour
618 feet per second 678.119 kilometers per hour
619 feet per second 679.216 kilometers per hour