## Unit Converter

## 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 20 centimeters into decimeters we have to multiply 20 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

20 cm → L_{(dm)}

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

L_{(dm)} = 20 cm × 0.1 dm

L_{(dm)} = 2 dm

The final result is:

20 cm → 2 dm

We conclude that **20 centimeters is equivalent to 2 decimeters**:

20 centimeters = 2 decimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case **1 decimeter is equal to 0.5 × 20 centimeters**.

Another way is saying that *20 centimeters is equal to 1 ÷ 0.5 decimeters*.

## Approximate result

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

20 cm ≅ 2 dm

An alternative is also that *one decimeter is approximately zero point five times twenty 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) |
---|---|

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 |

29 centimeters | 2.9 decimeters |

30 centimeters | 3 decimeters |