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 18 miles into kilometers we have to multiply 18 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

18 mi → L_(km)

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

L_(km) = 18 mi × 1.609344 km

L_(km) = 28.968192 km

The final result is:

18 mi → 28.968192 km

We conclude that 18 miles is equivalent to 28.968192 kilometers:

18 miles = 28.968192 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.034520621790963 × 18 miles.

Another way is saying that 18 miles is equal to 1 ÷ 0.034520621790963 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen miles is approximately twenty-eight point nine six eight kilometers:

18 mi ≅ 28.968 km

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