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 125 decimeters into millimeters we have to multiply 125 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

125 dm → L_(mm)

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

L_(mm) = 125 dm × 100 mm

L_(mm) = 12500 mm

The final result is:

125 dm → 12500 mm

We conclude that 125 decimeters is equivalent to 12500 millimeters:

125 decimeters = 12500 millimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 8.0E-5 × 125 decimeters.

Another way is saying that 125 decimeters is equal to 1 ÷ 8.0E-5 millimeters.

Approximate result

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

125 dm ≅ 12500 mm

An alternative is also that one millimeter is approximately zero times one hundred twenty-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