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 1200 millimeters into decimeters we have to multiply 1200 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

1200 mm → L_(dm)

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

L_(dm) = 1200 mm × 0.01 dm

L_(dm) = 12 dm

The final result is:

1200 mm → 12 dm

We conclude that 1200 millimeters is equivalent to 12 decimeters:

1200 millimeters = 12 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.083333333333333 × 1200 millimeters.

Another way is saying that 1200 millimeters is equal to 1 ÷ 0.083333333333333 decimeters.

Approximate result

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

1200 mm ≅ 12 dm

An alternative is also that one decimeter is approximately zero point zero eight three times one thousand two hundred 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