13 centimeters in millimeters

Conversion formula
How to convert 13 centimeters to millimeters?

We know (by definition) that: $1\mathrm{cm}=10\mathrm{mm}$

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

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

Conclusion: 13 ⁢ cm = 130 ⁢ mm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 millimeter is equal to 0.00769230769230769 times 13 centimeters.

It can also be expressed as: 13 centimeters is equal to $\frac{1}{\mathrm{0.00769230769230769}}$ millimeters.

Approximation

An approximate numerical result would be: thirteen centimeters is about one hundred and thirty millimeters, or alternatively, a millimeter is about zero point zero one times thirteen centimeters.