Convert Millimeter to Decimeter
Convert millimeters to decimeters by entering a value below.
How to Convert Millimeters to Decimeters
The millimeter and decimeter are both units of length. By definition, 1 decimeter equals exactly 100 millimeters. This means to convert millimeters to decimeters, you divide by 100.
Formula
Step-by-Step Example
Convert 5 mm to decimeters:
We need to convert millimeters to decimeters
Since 1 dm = 100 mm, divide by 100
5 ÷ 100 = 0.05
5 mm = 0.05 dm
Millimeter to Decimeter Conversion Table
Quick reference table for common millimeter to decimeter conversions. Click any value for detailed calculation.
| Millimeters (mm) | Decimeters (dm) |
|---|---|
| 1 mm | 0.01 dm |
| 2 mm | 0.02 dm |
| 5 mm | 0.05 dm |
| 10 mm | 0.1 dm |
| 15 mm | 0.15 dm |
| 20 mm | 0.2 dm |
| 25 mm | 0.25 dm |
| 50 mm | 0.5 dm |
| 100 mm | 1 dm |
About These Units
Millimeter (mm)
A millimeter (mm) is a metric unit of length equal to 1/1000 of a meter or 0.03937 inches. Millimeters are essential for precision measurements in engineering, manufacturing, medical imaging, and rainfall measurements. There are 25.4 mm in one inch.
Decimeter (dm)
A decimeter (dm) is a metric unit of length equal to 1/10 of a meter, 10 centimeters, or approximately 3.94 inches. Decimeters are commonly used in Europe for measuring furniture dimensions, fabric lengths, and in educational contexts.
Frequently Asked Questions
How do I convert millimeters to decimeters?
To convert millimeters to decimeters, divide the value by 100. For example, 10 mm = 0.1 dm.
How many decimeters are in 1 millimeter?
1 millimeter equals 0.01 decimeters.
What is the formula for millimeters to decimeters?
The formula is: dm = mm ÷ 100.