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 20.4 miles into kilometers we have to multiply 20.4 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

20.4 mi → L_(km)

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

L_(km) = 20.4 mi × 1.609344 km

L_(km) = 32.8306176 km

The final result is:

20.4 mi → 32.8306176 km

We conclude that 20.4 miles is equivalent to 32.8306176 kilometers:

20.4 miles = 32.8306176 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.030459372168497 × 20.4 miles.

Another way is saying that 20.4 miles is equal to 1 ÷ 0.030459372168497 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty point four miles is approximately thirty-two point eight three one kilometers:

20.4 mi ≅ 32.831 km

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