## Conversion formula

The conversion factor from inches to kilometers is 2.54E-5, which means that 1 inch is equal to 2.54E-5 kilometers:

1 in = 2.54E-5 km

To convert 18 inches into kilometers we have to multiply 18 by the conversion factor in order to get the length amount from inches to kilometers. We can also form a simple proportion to calculate the result:

1 in → 2.54E-5 km

18 in → L(km)

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

L(km) = 18 in × 2.54E-5 km

L(km) = 0.0004572 km

The final result is:

18 in → 0.0004572 km

We conclude that 18 inches is equivalent to 0.0004572 kilometers:

18 inches = 0.0004572 kilometers

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 2187.2265966754 × 18 inches.

Another way is saying that 18 inches is equal to 1 ÷ 2187.2265966754 kilometers.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen inches is approximately zero kilometers:

18 in ≅ 0 km

An alternative is also that one kilometer is approximately two thousand one hundred eighty-seven point two two seven times eighteen inches.

## Conversion table

### inches to kilometers chart

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

inches (in) kilometers (km)
19 inches 0 kilometers
20 inches 0.001 kilometers
21 inches 0.001 kilometers
22 inches 0.001 kilometers
23 inches 0.001 kilometers
24 inches 0.001 kilometers
25 inches 0.001 kilometers
26 inches 0.001 kilometers
27 inches 0.001 kilometers
28 inches 0.001 kilometers