12 decimeters in millimeters

Conversion formula
How to convert 12 decimeters to millimeters?

We know (by definition) that: $1\mathrm{dm}=100\mathrm{mm}$

We can set up a proportion to solve for the number of millimeters.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 12 ⁢ dm = 1200 ⁢ mm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 millimeter is equal to 0.000833333333333333 times 12 decimeters.

It can also be expressed as: 12 decimeters is equal to $\frac{1}{\mathrm{0.000833333333333333}}$ millimeters.

Approximation

An approximate numerical result would be: twelve decimeters is about one thousand, two hundred millimeters, or alternatively, a millimeter is about zero times twelve decimeters.