30 inches in centimeters

Conversion formula
How to convert 30 inches to centimeters?

We know (by definition) that: $1\mathrm{in}=2.54\mathrm{cm}$

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

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

Conclusion: 30 ⁢ in = 76.2 ⁢ cm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 centimeter is equal to 0.0131233595800525 times 30 inches.

It can also be expressed as: 30 inches is equal to $\frac{1}{\mathrm{0.0131233595800525}}$ centimeters.

Approximation

An approximate numerical result would be: thirty inches is about zero centimeters, or alternatively, a centimeter is about zero point zero one times thirty inches.