1. What is PPI (Pixels Per Inch)?

Definition: PPI measures the pixel density of a display screen, indicating how many pixels are packed into one linear inch of the display.

Purpose: Helps determine the sharpness and clarity of a display. Higher PPI means sharper images and text.

2. How Does the PPI Calculator Work?

The calculator uses the formula:

Where:

• \( \text{PPI} \) — Pixels per inch (density measurement)
• \( \text{Width} \) — Horizontal resolution in pixels
• \( \text{Height} \) — Vertical resolution in pixels
• \( \text{Diagonal} \) — Screen size in inches (measured diagonally)

Explanation: The formula calculates the diagonal resolution in pixels and divides it by the physical screen size in inches.

3. Importance of PPI Calculation

Details: Understanding PPI helps when choosing displays for specific uses - higher PPI for detailed work (graphic design), lower PPI for general use.

4. Using the Calculator

Tips: Enter the screen's resolution (width and height in pixels) and the physical diagonal size in inches. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a good PPI for a smartphone?
A: Modern smartphones typically have 300-500 PPI for sharp display quality.

Q2: How does PPI relate to viewing distance?
A: Higher PPI matters more for devices viewed closely (phones, tablets) than those viewed from farther away (TVs).

Q3: Is PPI the same as DPI?
A: No, PPI refers to screen pixels, while DPI (dots per inch) refers to printer resolution, though they're often used interchangeably.

Q4: What's the PPI of a 24" 1080p monitor?
A: About 92 PPI (1920x1080 resolution on 24" diagonal).

Q5: Does higher PPI always mean better quality?
A: Not necessarily - beyond a certain point (about 300 PPI at normal viewing distances), the human eye can't discern individual pixels.