Conversion formula

The conversion factor from millimeters to decimeters is 0.01, which means that 1 millimeter is equal to 0.01 decimeters:

1 mm = 0.01 dm

To convert 1 millimeter into decimeters we have to multiply 1 by the conversion factor in order to get the length amount from millimeters to decimeters. We can also form a simple proportion to calculate the result:

1 mm → 0.01 dm

1 mm → L_(dm)

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

L_(dm) = 1 mm × 0.01 dm

L_(dm) = 0.01 dm

The final result is:

1 mm → 0.01 dm

We conclude that 1 millimeter is equivalent to 0.01 decimeters:

1 millimeter = 0.01 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 100 × 1 millimeter.

Another way is saying that 1 millimeter is equal to 1 ÷ 100 decimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one millimeter is approximately zero point zero one decimeters:

1 mm ≅ 0.01 dm

An alternative is also that one decimeter is approximately one hundred times one millimeter.

Conversion table

millimeters to decimeters chart

For quick reference purposes, below is the conversion table you can use to convert from millimeters to decimeters