## 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 121 feet per second into miles per hour we have to multiply 121 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

121 ft/s → V_{(mph)}

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

V_{(mph)} = 121 ft/s × 0.68181818181818 mph

V_{(mph)} = 82.5 mph

The final result is:

121 ft/s → 82.5 mph

We conclude that **121 feet per second is equivalent to 82.5 miles per hour**:

121 feet per second = 82.5 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 0.012121212121212 × 121 feet per second**.

Another way is saying that *121 feet per second is equal to 1 ÷ 0.012121212121212 miles per hour*.

## Approximate result

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

121 ft/s ≅ 82.5 mph

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

122 feet per second | 83.182 miles per hour |

123 feet per second | 83.864 miles per hour |

124 feet per second | 84.545 miles per hour |

125 feet per second | 85.227 miles per hour |

126 feet per second | 85.909 miles per hour |

127 feet per second | 86.591 miles per hour |

128 feet per second | 87.273 miles per hour |

129 feet per second | 87.955 miles per hour |

130 feet per second | 88.636 miles per hour |

131 feet per second | 89.318 miles per hour |