Convert kilometers per hour to miles per hour

Convert Miles Per Hour to Kilometers Per Hour (mph to kph) ▶

Conversion Table

How to convert

1 kilometer per hour (kph) = 0.621371 mile per hour (mph). Kilometer Per Hour (kph) is a unit of Speed used in Metric system. Mile Per Hour (mph) is a unit of Speed used in Standard system. Kilometers per hour also can be marked as km/h and Kilometres per hour(alternative British English spelling in UK). Miles per hour also can be marked as mile/hour and mi/h.

Español     Russian     Français

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

    Quick navigation:

1. How many Kilometers per hour equal one Mile per hour?
2. Difference between Kilometers per hour and Miles per hour
3. How to convert Kilometers per hour to Miles per hour?
4. Kph 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 "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 usually 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:

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

    Kph to mph conversion table

    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.

How do you convert km per hour to miles per hour?

How do you convert km to miles speed?

What is 9 km per hour in miles?

How much is 25 km in miles per hour?