# Kilometers Per Hour to Miles Per Hour Conversion

Enter the speed in kilometers per hour below to get the value converted to miles per hour.

**Results in Miles Per Hour:**

## How to Convert Kilometers Per Hour to Miles Per Hour

The fastest way to convert kilometers per hour to miles per hour is to use this simple formula:

The speed in miles per hour is equal to the speed in kilometers per hour divided by 1.609344.
Since one kilometer per hour is equal to 1.609344 miles per hour,^{[1]} that's the conversion ratio used in the formula.

**For example,** here's how to convert 5 kilometers per hour to miles per hour using the formula above.

5 km/h = (5 ÷ 1.609344) = 3.106856 mph

Kilometers per hour and miles per hour are both units used to measure speed. Keep reading to learn more about each unit of measure.

## Kilometers Per Hour

Kilometers per hour are a measurement of speed expressing the distance travelled in kilometers in one hour.

The kilometer per hour, or kilometre per hour, is an SI unit of speed in the metric system. Kilometers per hour can be abbreviated as *km/h*, and are also sometimes abbreviated as *kph*. For example, 1 kilometer per hour can be written as 1 km/h or 1 kph.

In formal expressions, the slash, or solidus (/), is used to separate units used to indicate division in an expression.^{[2]}

Kilometers per hour can be expressed using the formula:

v_{km/s} = d_{km}t_{hr}

The velocity in kilometers per hour is equal to the distance in kilometers divided by time in hours.

## Miles Per Hour

Miles per hour are a measurement of speed expressing the distance travelled in miles in one hour.^{[3]}

The mile per hour is a US customary and imperial unit of speed. Miles per hour can be abbreviated as *mph*, and are also sometimes abbreviated as *mi/h* or *MPH*. For example, 1 mile per hour can be written as 1 mph, 1 mi/h, or 1 MPH.

Miles per hour can be expressed using the formula:

v_{mph} = d_{mi}t_{hr}

The velocity in miles per hour is equal to the distance in miles divided by time in hours.

## Kilometer Per Hour to Mile Per Hour Conversion Table

Kilometers Per Hour | Miles Per Hour |
---|---|

1 km/h | 0.62 mph |

2 km/h | 1.24 mph |

3 km/h | 1.86 mph |

4 km/h | 2.49 mph |

5 km/h | 3.11 mph |

10 km/h | 6.21 mph |

15 km/h | 9.32 mph |

20 km/h | 12.43 mph |

25 km/h | 15.53 mph |

30 km/h | 18.64 mph |

35 km/h | 21.75 mph |

40 km/h | 24.85 mph |

45 km/h | 27.96 mph |

50 km/h | 31.07 mph |

55 km/h | 34.18 mph |

60 km/h | 37.28 mph |

65 km/h | 40.39 mph |

70 km/h | 43.5 mph |

75 km/h | 46.6 mph |

80 km/h | 49.71 mph |

85 km/h | 52.82 mph |

90 km/h | 55.92 mph |

95 km/h | 59.03 mph |

100 km/h | 62.14 mph |

105 km/h | 65.24 mph |

110 km/h | 68.35 mph |

115 km/h | 71.46 mph |

120 km/h | 74.56 mph |

125 km/h | 77.67 mph |

130 km/h | 80.78 mph |

135 km/h | 83.89 mph |

140 km/h | 86.99 mph |

145 km/h | 90.1 mph |

150 km/h | 93.21 mph |

155 km/h | 96.31 mph |

160 km/h | 99.42 mph |

## References

- National Institute of Standards and Technology, NIST Guide to the SI, https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8
- National Institute of Standards and Technology, NIST Guide to the SI, Chapter 6: Rules and Style Conventions for Printing and Using Units, https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using
- Wikipedia, Miles per hour, https://en.wikipedia.org/wiki/Miles_per_hour