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 1.8 millimeters into decimeters we have to multiply 1.8 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

1.8 mm → L_(dm)

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

L_(dm) = 1.8 mm × 0.01 dm

L_(dm) = 0.018 dm

The final result is:

1.8 mm → 0.018 dm

We conclude that 1.8 millimeters is equivalent to 0.018 decimeters:

1.8 millimeters = 0.018 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 55.555555555556 × 1.8 millimeters.

Another way is saying that 1.8 millimeters is equal to 1 ÷ 55.555555555556 decimeters.

Approximate result

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

1.8 mm ≅ 0.018 dm

An alternative is also that one decimeter is approximately fifty-five point five five six times one point eight 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