## 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 30 centimeters into decimeters we have to multiply 30 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

30 cm → L(dm)

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

L(dm) = 30 cm × 0.1 dm

L(dm) = 3 dm

The final result is:

30 cm → 3 dm

We conclude that 30 centimeters is equivalent to 3 decimeters:

30 centimeters = 3 decimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.33333333333333 × 30 centimeters.

Another way is saying that 30 centimeters is equal to 1 ÷ 0.33333333333333 decimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that thirty centimeters is approximately three decimeters:

30 cm ≅ 3 dm

An alternative is also that one decimeter is approximately zero point three three three times thirty 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)
31 centimeters 3.1 decimeters
32 centimeters 3.2 decimeters
33 centimeters 3.3 decimeters
34 centimeters 3.4 decimeters
35 centimeters 3.5 decimeters
36 centimeters 3.6 decimeters
37 centimeters 3.7 decimeters
38 centimeters 3.8 decimeters
39 centimeters 3.9 decimeters
40 centimeters 4 decimeters