## 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 80.4 feet per second into miles per hour we have to multiply 80.4 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

80.4 ft/s → V(mph)

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

V(mph) = 80.4 ft/s × 0.68181818181818 mph

V(mph) = 54.818181818182 mph

The final result is:

80.4 ft/s → 54.818181818182 mph

We conclude that 80.4 feet per second is equivalent to 54.818181818182 miles per hour:

80.4 feet per second = 54.818181818182 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 0.018242122719735 × 80.4 feet per second.

Another way is saying that 80.4 feet per second is equal to 1 ÷ 0.018242122719735 miles per hour.

## Approximate result

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

80.4 ft/s ≅ 54.818 mph

An alternative is also that one mile per hour is approximately zero point zero one eight times eighty point four 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)
81.4 feet per second 55.5 miles per hour
82.4 feet per second 56.182 miles per hour
83.4 feet per second 56.864 miles per hour
84.4 feet per second 57.545 miles per hour
85.4 feet per second 58.227 miles per hour
86.4 feet per second 58.909 miles per hour
87.4 feet per second 59.591 miles per hour
88.4 feet per second 60.273 miles per hour
89.4 feet per second 60.955 miles per hour
90.4 feet per second 61.636 miles per hour