# Miles per Hour to Kilometers per Hour Converter

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

## Result in Kilometers per Hour:

Do you want to convert kilometers per hour to miles per hour?

## How to Convert Miles per Hour to Kilometers per Hour

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

km/h = mph × 1.609344

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

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

km/h = (5 mph × 1.609344) = 8.04672 km/h

Miles per hour and kilometers per hour are both units used to measure speed. Calculate speed in miles per hour or kilometers per hour using our speed calculator or keep reading to learn more about each unit of measure.

## What Are Miles per Hour?

Miles per hour are a measurement of speed expressing the distance traveled in miles in one hour.^{[2]}

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.

Learn more about miles per hour.

## What Are Kilometers per Hour?

Kilometers per hour are a measurement of speed expressing the distance traveled 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 the expressions of units, the slash, or solidus (/), is used to express a change in one or more units relative to a change in one or more other units.^{[3]} For example, km/h is expressing a change in length or distance relative to a change in time.

Kilometers per hour can be expressed using the formula:

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

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

Learn more about kilometers per hour.

## Mile per Hour to Kilometer per Hour Conversion Table

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

1 mph | 1.61 km/h |

2 mph | 3.22 km/h |

3 mph | 4.83 km/h |

4 mph | 6.44 km/h |

5 mph | 8.05 km/h |

10 mph | 16.09 km/h |

15 mph | 24.14 km/h |

20 mph | 32.19 km/h |

25 mph | 40.23 km/h |

30 mph | 48.28 km/h |

35 mph | 56.33 km/h |

40 mph | 64.37 km/h |

45 mph | 72.42 km/h |

50 mph | 80.47 km/h |

55 mph | 88.51 km/h |

60 mph | 96.56 km/h |

65 mph | 104.61 km/h |

70 mph | 112.65 km/h |

75 mph | 120.7 km/h |

80 mph | 128.75 km/h |

85 mph | 136.79 km/h |

90 mph | 144.84 km/h |

95 mph | 152.89 km/h |

100 mph | 160.93 km/h |

## 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
- Wikipedia, Miles per hour, https://en.wikipedia.org/wiki/Miles_per_hour
- 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

## More Mile per Hour & Kilometer per Hour Conversions

- miles per hour to knots
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- miles per hour to feet per second
- miles per hour to kilometers per second
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- miles per hour to centimeters per second
- knots to kilometers per hour
- Mach number to kilometers per hour
- speed of sound to kilometers per hour
- speed of light to kilometers per hour
- feet per second to kilometers per hour
- kilometers per second to kilometers per hour
- meters per second to kilometers per hour
- centimeters per second to kilometers per hour