## Conversion formula

The conversion factor from inches to decimeters is 0.254, which means that 1 inch is equal to 0.254 decimeters:

1 in = 0.254 dm

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

1 in → 0.254 dm

18 in → L(dm)

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

L(dm) = 18 in × 0.254 dm

L(dm) = 4.572 dm

The final result is:

18 in → 4.572 dm

We conclude that 18 inches is equivalent to 4.572 decimeters:

18 inches = 4.572 decimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.21872265966754 × 18 inches.

Another way is saying that 18 inches is equal to 1 ÷ 0.21872265966754 decimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen inches is approximately four point five seven two decimeters:

18 in ≅ 4.572 dm

An alternative is also that one decimeter is approximately zero point two one nine times eighteen inches.

## Conversion table

### inches to decimeters chart

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

inches (in) decimeters (dm)
19 inches 4.826 decimeters
20 inches 5.08 decimeters
21 inches 5.334 decimeters
22 inches 5.588 decimeters
23 inches 5.842 decimeters
24 inches 6.096 decimeters
25 inches 6.35 decimeters
26 inches 6.604 decimeters
27 inches 6.858 decimeters
28 inches 7.112 decimeters