Unit Converter
Conversion formula
The conversion factor from decimeters to millimeters is 100, which means that 1 decimeter is equal to 100 millimeters:
1 dm = 100 mm
To convert 4 decimeters into millimeters we have to multiply 4 by the conversion factor in order to get the length amount from decimeters to millimeters. We can also form a simple proportion to calculate the result:
1 dm → 100 mm
4 dm → L(mm)
Solve the above proportion to obtain the length L in millimeters:
L(mm) = 4 dm × 100 mm
L(mm) = 400 mm
The final result is:
4 dm → 400 mm
We conclude that 4 decimeters is equivalent to 400 millimeters:
4 decimeters = 400 millimeters
Alternative conversion
We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.0025 × 4 decimeters.
Another way is saying that 4 decimeters is equal to 1 ÷ 0.0025 millimeters.
Approximate result
For practical purposes we can round our final result to an approximate numerical value. We can say that four decimeters is approximately four hundred millimeters:
4 dm ≅ 400 mm
An alternative is also that one millimeter is approximately zero point zero zero three times four decimeters.
Conversion table
decimeters to millimeters chart
For quick reference purposes, below is the conversion table you can use to convert from decimeters to millimeters
decimeters (dm) | millimeters (mm) |
---|---|
5 decimeters | 500 millimeters |
6 decimeters | 600 millimeters |
7 decimeters | 700 millimeters |
8 decimeters | 800 millimeters |
9 decimeters | 900 millimeters |
10 decimeters | 1000 millimeters |
11 decimeters | 1100 millimeters |
12 decimeters | 1200 millimeters |
13 decimeters | 1300 millimeters |
14 decimeters | 1400 millimeters |