## Conversion formula

The conversion factor from centimeters to decimeters is 0.1, which means that 1 centimeter is equal to 0.1 decimeters:

1 cm = 0.1 dm

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

1 cm → 0.1 dm

18 cm → L(dm)

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

L(dm) = 18 cm × 0.1 dm

L(dm) = 1.8 dm

The final result is:

18 cm → 1.8 dm

We conclude that 18 centimeters is equivalent to 1.8 decimeters:

18 centimeters = 1.8 decimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.55555555555556 × 18 centimeters.

Another way is saying that 18 centimeters is equal to 1 ÷ 0.55555555555556 decimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen centimeters is approximately one point eight decimeters:

18 cm ≅ 1.8 dm

An alternative is also that one decimeter is approximately zero point five five six times eighteen centimeters.

## Conversion table

### centimeters to decimeters chart

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

centimeters (cm) decimeters (dm)
19 centimeters 1.9 decimeters
20 centimeters 2 decimeters
21 centimeters 2.1 decimeters
22 centimeters 2.2 decimeters
23 centimeters 2.3 decimeters
24 centimeters 2.4 decimeters
25 centimeters 2.5 decimeters
26 centimeters 2.6 decimeters
27 centimeters 2.7 decimeters
28 centimeters 2.8 decimeters