The formula to calculate the Pages Per Inch (PPI) is:
\[
PPI = \frac{1}{PT}
\]
Where:
\( PPI \) is the Pages Per Inch
\( PT \) is the Paper Thickness (in inches)
Definition
Pages Per Inch (PPI): A measure of the number of pages that fit into a one-inch stack. It is commonly used in the printing and publishing industries to estimate the thickness of books and documents based on the paper’s thickness.
Paper Thickness (PT): The thickness of a single sheet of paper, measured in inches.
Significance: Understanding PPI is important for logistics, packaging, and ensuring that a book’s spine can accommodate the number of pages.
Example
Let's say the paper thickness (PT) is 0.005 inches. Using the formula:
