Kilometers per hour to Miles per hour Converter

Use this converter to easily convert between Kilometers per hour and Miles per hour (kmph to mph).

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How many Kilometers per hour equal one Mile per hour?

When talking about speed measurement 1.609344 kilometers per hour equal one mile per hour. This follows from the definition of a mile as 5280 feet, the definition of a feet as 0.3044 meters, and the definition of a kilometer as 1,000 meters. Since the time measurement unit is the same, an hour, it plays no role in the conversion. These are internationally agreed upon unit definitions that were established by a treaty signed in 1959. The internationally recognized symbol for kilometer is "km", and "mi" for mile, translating to "kmph" (often "kph") and "miph" which is more often abbreviated to "mph", causing potential confusion with meters per hour.

Difference between Kilometers per hour and Miles per hour

Both kilometers and miles are units for measuring distances and they are of comparable magnitude. Since the time dimension is in hours for both speed units, the only difference remains that between the length units. The difference is that the mile is a part of the imperial unit system, used in several countries like the United States and the United Kingdom, while the kilometer is a unit from the metric system.

While the kilometer is a modern unit, the mile has a long history, dating back at least far as the Romans. The Roman mile was 5,000 long, and there were other miles like the English mile, Irish mile, Italian mile, etc. that corresponded to different distance in different time periods and locations.

How to convert Kilometers per hour to Miles per hour?

To convert from kilometers per hour to miles per hour, divide the measurement in kmph by 1.609344 to get the equivalent in mph. As you can see, it is the same as converting km to miles. This unit conversion is usualy done with the help of a calculator. Our online kph to mph converter above will be of great assistance, as it is easy to use, has a quick copy button to copy the result to your clipboard for later use.

Km per hour to Miles per hour conversion example

Sample task: convert 100 kilometers per hour to miles per hour. Solution:

kmph / 1.609344 = mph
100 kmph / 1.6093 = 62.137119 mph
End result:
100 kmph is equal to 62.137119 mph

Kph to mph conversion table

kph to mph conversion table
kph mph
1 kph 0.621371 mph
2 kph 1.242742 mph
3 kph 1.864114 mph
4 kph 2.485485 mph
5 kph 3.106856 mph
6 kph 3.728227 mph
7 kph 4.349598 mph
8 kph 4.970970 mph
9 kph 5.592341 mph
10 kph 6.213712 mph
20 kph 12.427424 mph
30 kph 18.641136 mph
40 kph 24.854848 mph
50 kph 31.068560 mph
60 kph 37.282272 mph
70 kph 43.495983 mph
80 kph 49.709695 mph
90 kph 55.923407 mph
100 kph 62.137119 mph
200 kph 124.274238 mph
300 kph 186.411358 mph
400 kph 248.548477 mph
500 kph 310.685596 mph
600 kph 372.822715 mph
700 kph 434.959835 mph
800 kph 497.096954 mph
900 kph 559.234073 mph
1,000 kph 621.371192 mph


[1] NIST Special Publication 330 (2008) - "The International System of Units (SI)", edited by Barry N.Taylor and Ambler Thompson

[2] International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4.

Cite this converter & page

If you'd like to cite this online converter resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Kmh to Mph Converter", [online] Available at: URL [Accessed Date: 12 Jun, 2021].