## Unit Converter

## 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 20.4 feet per second into miles per hour we have to multiply 20.4 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

20.4 ft/s → V_{(mph)}

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

V_{(mph)} = 20.4 ft/s × 0.68181818181818 mph

V_{(mph)} = 13.909090909091 mph

The final result is:

20.4 ft/s → 13.909090909091 mph

We conclude that **20.4 feet per second is equivalent to 13.909090909091 miles per hour**:

20.4 feet per second = 13.909090909091 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 0.071895424836601 × 20.4 feet per second**.

Another way is saying that *20.4 feet per second is equal to 1 ÷ 0.071895424836601 miles per hour*.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that **twenty point four feet per second is approximately thirteen point nine zero nine miles per hour**:

20.4 ft/s ≅ 13.909 mph

An alternative is also that *one mile per hour is approximately zero point zero seven two times twenty 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) |
---|---|

21.4 feet per second | 14.591 miles per hour |

22.4 feet per second | 15.273 miles per hour |

23.4 feet per second | 15.955 miles per hour |

24.4 feet per second | 16.636 miles per hour |

25.4 feet per second | 17.318 miles per hour |

26.4 feet per second | 18 miles per hour |

27.4 feet per second | 18.682 miles per hour |

28.4 feet per second | 19.364 miles per hour |

29.4 feet per second | 20.045 miles per hour |

30.4 feet per second | 20.727 miles per hour |