15 centimeters in millimeters

Conversion formula
How to convert 15 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: 15 ⁢ cm = 150 ⁢ mm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 millimeter is equal to 0.00666666666666667 times 15 centimeters.

It can also be expressed as: 15 centimeters is equal to $\frac{1}{\mathrm{0.00666666666666667}}$ millimeters.

Approximation

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