Kmh to Mph Converter
Use this kilometers per hour to miles per hour converter to easily convert between kilometers/h and mph (a.k.a. kmph to mph or km to mph).
- How many Kilometers per hour equal one Mile per hour?
- Difference between Kilometers per hour and Miles per hour
- How to convert kmh to mph?
- Kmh to mph conversion table
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 "kmh" or "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 kmh to mph?
To convert from kilometers per hour to miles per hour, divide the measurement in kmh 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 usually done with the help of a calculator. Our online kmh 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:
Formula:
km/h / 1.609344 = mph
Calculation:
100 km/h / 1.6093 = 62.137119 mph
End result:
100 km/h is equal to 62.137119 mph
Kmh to mph conversion table
| kmh | mph |
|---|---|
| 1 kmh | 0.621371 mph |
| 2 kmh | 1.242742 mph |
| 3 kmh | 1.864114 mph |
| 4 kmh | 2.485485 mph |
| 5 kmh | 3.106856 mph |
| 6 kmh | 3.728227 mph |
| 7 kmh | 4.349598 mph |
| 8 kmh | 4.970970 mph |
| 9 kmh | 5.592341 mph |
| 10 kmh | 6.213712 mph |
| 20 kmh | 12.427424 mph |
| 30 kmh | 18.641136 mph |
| 40 kmh | 24.854848 mph |
| 50 kmh | 31.068560 mph |
| 60 kmh | 37.282272 mph |
| 70 kmh | 43.495983 mph |
| 80 kmh | 49.709695 mph |
| 90 kmh | 55.923407 mph |
| 100 kmh | 62.137119 mph |
| 200 kmh | 124.274238 mph |
| 300 kmh | 186.411358 mph |
| 400 kmh | 248.548477 mph |
| 500 kmh | 310.685596 mph |
| 600 kmh | 372.822715 mph |
| 700 kmh | 434.959835 mph |
| 800 kmh | 497.096954 mph |
| 900 kmh | 559.234073 mph |
| 1,000 kmh | 621.371192 mph |
References
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: https://www.gigacalculator.com/converters/convert-kmph-to-mph.php URL [Accessed Date: 23 Mar, 2026].