5 decimeters in millimeters

Conversion formula
How to convert 5 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: 5 ⁢ dm = 500 ⁢ mm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 millimeter is equal to 0.002 times 5 decimeters.

It can also be expressed as: 5 decimeters is equal to $\frac{1}{\mathrm{0.002}}$ millimeters.

Approximation

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