## 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 45 decimeters into millimeters we have to multiply 45 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

45 dm → L(mm)

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

L(mm) = 45 dm × 100 mm

L(mm) = 4500 mm

The final result is:

45 dm → 4500 mm

We conclude that 45 decimeters is equivalent to 4500 millimeters:

45 decimeters = 4500 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.00022222222222222 × 45 decimeters.

Another way is saying that 45 decimeters is equal to 1 ÷ 0.00022222222222222 millimeters.

## Approximate result

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

45 dm ≅ 4500 mm

An alternative is also that one millimeter is approximately zero times forty-five 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)
46 decimeters 4600 millimeters
47 decimeters 4700 millimeters
48 decimeters 4800 millimeters
49 decimeters 4900 millimeters
50 decimeters 5000 millimeters
51 decimeters 5100 millimeters
52 decimeters 5200 millimeters
53 decimeters 5300 millimeters
54 decimeters 5400 millimeters
55 decimeters 5500 millimeters