Conversion formula

The conversion factor from miles to kilometers is 1.609344, which means that 1 mile is equal to 1.609344 kilometers:

1 mi = 1.609344 km

To convert 2.5 miles into kilometers we have to multiply 2.5 by the conversion factor in order to get the length amount from miles to kilometers. We can also form a simple proportion to calculate the result:

1 mi → 1.609344 km

2.5 mi → L_(km)

Solve the above proportion to obtain the length L in kilometers:

L_(km) = 2.5 mi × 1.609344 km

L_(km) = 4.02336 km

The final result is:

2.5 mi → 4.02336 km

We conclude that 2.5 miles is equivalent to 4.02336 kilometers:

2.5 miles = 4.02336 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.24854847689493 × 2.5 miles.

Another way is saying that 2.5 miles is equal to 1 ÷ 0.24854847689493 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that two point five miles is approximately four point zero two three kilometers:

2.5 mi ≅ 4.023 km

An alternative is also that one kilometer is approximately zero point two four nine times two point five miles.

Conversion table

miles to kilometers chart

For quick reference purposes, below is the conversion table you can use to convert from miles to kilometers