### What is a Millimeter?

The **Millimetre** (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one-thousandth of a meter, which is the SI base unit of length. Therefore, there are one thousand millimeters in a meter and ten millimeters in a centimeter.

### What is a Decimeter?

The **Decimetre** (SI symbol dm) or decimeter (American spelling) is a unit of length in the metric system, equal to one-tenth of a meter. The term “Deci” means one-tenth, and therefore decimetre means one-tenth of a meter.

Since a meter is made up of 100 cm, one-tenth of 100 cm is 10 cm. Thus one decimeter measures 10 cm or 3.937 inches

### How to Convert Millimeter to Decimeters?

To convert Millimeter to Decimeters, simply divide the Millimeter value by 100.

The formula used to calculate Millimeter to Decimeters -

**d**_{(mm)} = **d**_{(dm)} / 100

The distance *d* in Decimeters (dm) is equal to the distance *d* in Millimeters (mm) divided by 100.

### How many Decimeters in a Millimeter

In simple terms, 1 mm is equal to 0.01 dm.

The formula used is 1/100 = 0.01(dm)

### How many Millimeters in a Decimeter

1 Decimeter is equal to 100 Millimeters. So we can also say that there are 100 Millimeters in a Decimeter.

### Millimeter to Decimeters Conversion Table

Millimeter (mm) | Decimeter (dm) |
---|---|

0.01 (mm) | |

0.02 (mm) | |

0.03 (mm) | |

0.04 (mm) | |

0.05 (mm) | |

1 (mm) | |

2 (mm) | |

3 (mm) | |

4 (mm) | |

5 (mm) | |

6 (mm) | |

7 (mm) | |

8 (mm) | |

9 (mm) | |

10 (mm) | |

20 (mm) | |

30 (mm) | |

40 (mm) | |

50 (mm) | |

60 (mm) | |

70 (mm) | |

80 (mm) | |

90 (mm) | |

100 (mm) | |

200 (mm) | |

300 (mm) | |

400 (mm) | |

500 (mm) | |

600 (mm) | |

700 (mm) | |

800 (mm) | |

900 (mm) | |

1000 (mm) | |

5000 (mm) | |

10000 (mm) |