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 180 millimeters into decimeters we have to multiply 180 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

180 mm → L_(dm)

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

L_(dm) = 180 mm × 0.01 dm

L_(dm) = 1.8 dm

The final result is:

180 mm → 1.8 dm

We conclude that 180 millimeters is equivalent to 1.8 decimeters:

180 millimeters = 1.8 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.55555555555556 × 180 millimeters.

Another way is saying that 180 millimeters is equal to 1 ÷ 0.55555555555556 decimeters.

Approximate result

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

180 mm ≅ 1.8 dm

An alternative is also that one decimeter is approximately zero point five five six times one hundred eighty millimeters.

Conversion table

millimeters to decimeters chart

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