1. What is PPI?

PPI (Pixels Per Inch) is a measurement of the pixel density of a display screen. It indicates how many pixels are packed into one linear inch of screen space. Higher PPI means sharper image quality.

2. How Does the Calculator Work?

The calculator uses the PPI formula:

Where:

• \( width \) — Horizontal resolution in pixels
• \( height \) — Vertical resolution in pixels
• \( diagonal \) — Screen diagonal size in inches

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

3. Importance of PPI Calculation

Details: PPI helps determine display quality and viewing experience. Higher PPI displays show sharper images with less visible pixelation, important for graphic design, photo editing, and high-quality media consumption.

4. Using the Calculator

Tips: Enter the display's resolution (width and height in pixels) and the physical diagonal size in inches. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a good PPI for a monitor?
A: For desktop monitors, 90-110 PPI is common. For high-end displays, 200+ PPI offers retina-level quality at normal viewing distances.

Q2: Is PPI the same as DPI?
A: No. PPI refers to screen pixel density, while DPI (dots per inch) refers to printer resolution. They're often used interchangeably but are technically different.

Q3: Does PPI affect performance?
A: Higher PPI displays require more GPU power to render graphics at native resolution, which can impact gaming performance.

Q4: How does viewing distance affect PPI perception?
A: The farther you sit from a display, the less important high PPI becomes. This is why TVs often have lower PPI than computer monitors.

Q5: Can I calculate PPI for non-rectangular displays?
A: This calculator assumes standard rectangular displays. For unusual aspect ratios or non-rectangular displays, different calculations may be needed.