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 4.5 millimeters into decimeters we have to multiply 4.5 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

4.5 mm → L_(dm)

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

L_(dm) = 4.5 mm × 0.01 dm

L_(dm) = 0.045 dm

The final result is:

4.5 mm → 0.045 dm

We conclude that 4.5 millimeters is equivalent to 0.045 decimeters:

4.5 millimeters = 0.045 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 22.222222222222 × 4.5 millimeters.

Another way is saying that 4.5 millimeters is equal to 1 ÷ 22.222222222222 decimeters.

Approximate result

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

4.5 mm ≅ 0.045 dm

An alternative is also that one decimeter is approximately twenty-two point two two two times four point five 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