Characters Per Inch Calculator

Formula

The formula to calculate the Characters Per Inch (CPI) is:

\[ CPI = \frac{Characters}{FontSize \times 0.0138889} \]

Where:

\(CPI\) is the characters per inch
\(Characters\) is the number of characters
\(FontSize\) is the size of the font in points (1 point = 1/72 inch)

What is Characters Per Inch?

Characters per inch (CPI) is a measure used in typesetting and page layout to describe the number of characters of text that fit horizontally into one inch of printed space. This measure is important for understanding how text will appear on a page and is used to calculate line lengths and page margins in design layouts.

Example Calculation

Let's assume the following values:

Number of Characters = 100
Font Size = 12 points

Using the formula to calculate the Characters Per Inch (CPI):

\[ CPI = \frac{Characters}{FontSize \times 0.0138889} = \frac{100}{12 \times 0.0138889} ≈ 600.24 \text{ CPI} \]

The Characters Per Inch (CPI) is approximately 600.24 CPI.