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 0.4 miles into kilometers we have to multiply 0.4 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

0.4 mi → L_(km)

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

L_(km) = 0.4 mi × 1.609344 km

L_(km) = 0.6437376 km

The final result is:

0.4 mi → 0.6437376 km

We conclude that 0.4 miles is equivalent to 0.6437376 kilometers:

0.4 miles = 0.6437376 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 1.5534279805933 × 0.4 miles.

Another way is saying that 0.4 miles is equal to 1 ÷ 1.5534279805933 kilometers.

Approximate result

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

0.4 mi ≅ 0.644 km

An alternative is also that one kilometer is approximately one point five five three times zero point four 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