Millimeter to Decimeter Converter (mm to dm)

How to convert millimeters to decimeters

1 millimeter is equal to 0.01 decimeters, and 1 decimeter is equal to 100 millimeters. To convert, multiply by the conversion factor:

decimeters = millimeters × 0.01
decimeters = millimeters ÷ 100

Example: convert 15 mm to dm: 15 × 0.01 = 0.15 dm.

A millimeter is one thousandth of a meter. It's the standard unit in engineering drawings, manufacturing, rainfall and screen and paper sizes.

Symbol: mm · 1 mm = 0.001 m · Category: Metric (SI)

A decimeter is one tenth of a meter (10 cm). A cube one decimeter on each side holds exactly one liter.

Symbol: dm · 1 dm = 0.1 m · Category: Metric (SI)

Frequently asked questions

How many decimeters are in a millimeter?

There are 0.01 decimeters in 1 millimeter (mm).

How many millimeters are in a decimeter?

1 decimeter (dm) equals 100 millimeters.

How do I convert millimeters to decimeters?

Multiply the length in millimeters by 0.01. For example, 15 mm × 0.01 = 0.15 dm.

How do I convert decimeters to millimeters?

Divide the length in decimeters by 0.01, or multiply it by 100. You can also use the Decimeter to Millimeter converter.