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

## Have a Question or Feedback?

## Result in Miles per Hour:

1 km/h = 0.621371 mph

Learn how we calculated this below

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

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

By

Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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## Cite As:

Sexton, J. (n.d.). Kilometers per Hour to Miles per Hour Converter. Inch Calculator. Retrieved May 24, 2024, from https://www.inchcalculator.com/convert/kilometer-per-hour-to-mile-per-hour/

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

mph = km/h ÷ 1.609344

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.

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

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

## 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.^{[2]} 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.

## What Are Miles per Hour?

Miles per hour are a measurement of speed expressing the distance traveled 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.

Learn more about miles per hour.

## 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

## More Kilometer per Hour & Mile per Hour Conversions

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