## Conversion formula

The conversion factor from feet per second to miles per hour is 0.68181818181818, which means that 1 foot per second is equal to 0.68181818181818 miles per hour:

1 ft/s = 0.68181818181818 mph

To convert 555 feet per second into miles per hour we have to multiply 555 by the conversion factor in order to get the velocity amount from feet per second to miles per hour. We can also form a simple proportion to calculate the result:

1 ft/s → 0.68181818181818 mph

555 ft/s → V(mph)

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

V(mph) = 555 ft/s × 0.68181818181818 mph

V(mph) = 378.40909090909 mph

The final result is:

555 ft/s → 378.40909090909 mph

We conclude that 555 feet per second is equivalent to 378.40909090909 miles per hour:

555 feet per second = 378.40909090909 miles per hour

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile per hour is equal to 0.0026426426426426 × 555 feet per second.

Another way is saying that 555 feet per second is equal to 1 ÷ 0.0026426426426426 miles per hour.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that five hundred fifty-five feet per second is approximately three hundred seventy-eight point four zero nine miles per hour:

555 ft/s ≅ 378.409 mph

An alternative is also that one mile per hour is approximately zero point zero zero three times five hundred fifty-five feet per second.

## Conversion table

### feet per second to miles per hour chart

For quick reference purposes, below is the conversion table you can use to convert from feet per second to miles per hour

feet per second (ft/s) miles per hour (mph)
556 feet per second 379.091 miles per hour
557 feet per second 379.773 miles per hour
558 feet per second 380.455 miles per hour
559 feet per second 381.136 miles per hour
560 feet per second 381.818 miles per hour
561 feet per second 382.5 miles per hour
562 feet per second 383.182 miles per hour
563 feet per second 383.864 miles per hour
564 feet per second 384.545 miles per hour
565 feet per second 385.227 miles per hour