1. What is PPI (Pixels Per Inch)?

Definition: PPI measures the pixel density of digital displays, indicating how many pixels fit into one linear inch of screen space.

Purpose: Helps determine screen clarity and sharpness - higher PPI means crisper images and text.

2. How Does the PPI Calculator Work?

The calculator uses the formula:

Where:

• \( PPI \) — Pixel density (pixels per inch)
• \( Width \) — Horizontal resolution in pixels
• \( Height \) — Vertical resolution in pixels
• \( Diagonal \) — Screen size in inches (measured diagonally)

Explanation: The formula calculates the diagonal resolution in pixels (using Pythagorean theorem) and divides by the physical screen size.

3. Importance of PPI Calculation

Details: Understanding PPI helps when comparing displays, choosing appropriate screen sizes, and ensuring optimal viewing experiences.

4. Using the Calculator

Tips: Enter the screen's resolution (width and height in pixels) and 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 range from 300-500 PPI for sharp displays.

Q2: How does PPI differ from DPI?
A: PPI refers to screen pixels, while DPI (dots per inch) refers to printer resolution.

Q3: Does PPI affect image quality?
A: Higher PPI means sharper images, but viewing distance also matters - larger screens can have lower PPI if viewed from farther away.

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

Q5: Can PPI be too high?
A: Beyond a certain point (about 300 PPI at normal viewing distances), the human eye can't discern individual pixels.