## 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 628 feet per second into miles per hour we have to multiply 628 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

628 ft/s → V(mph)

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

V(mph) = 628 ft/s × 0.68181818181818 mph

V(mph) = 428.18181818182 mph

The final result is:

628 ft/s → 428.18181818182 mph

We conclude that 628 feet per second is equivalent to 428.18181818182 miles per hour:

628 feet per second = 428.18181818182 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 0.0023354564755839 × 628 feet per second.

Another way is saying that 628 feet per second is equal to 1 ÷ 0.0023354564755839 miles per hour.

## Approximate result

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

628 ft/s ≅ 428.182 mph

An alternative is also that one mile per hour is approximately zero point zero zero two times six hundred twenty-eight 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)
629 feet per second 428.864 miles per hour
630 feet per second 429.545 miles per hour
631 feet per second 430.227 miles per hour
632 feet per second 430.909 miles per hour
633 feet per second 431.591 miles per hour
634 feet per second 432.273 miles per hour
635 feet per second 432.955 miles per hour
636 feet per second 433.636 miles per hour
637 feet per second 434.318 miles per hour
638 feet per second 435 miles per hour