1. What is PPI²?

PPI² (Pixels Per Square Inch) is a measurement of pixel density that represents how many pixels are packed into one square inch of display area. It's a useful metric for comparing the resolution quality of different screens.

2. How Does the Calculator Work?

The calculator uses the PPI² formula:

Where:

• \( pixels^2 \) — Total number of pixels (width × height)
• \( inches^2 \) — Total screen area in square inches

Explanation: The formula calculates how many pixels are contained within each square inch of display area, providing a measure of display sharpness and clarity.

3. Importance of PPI² Calculation

Details: PPI² is important for comparing display quality across different devices. Higher PPI² values generally indicate sharper, more detailed images with less visible pixelation.

4. Using the Calculator

Tips: Enter the total number of pixels (width × height) and the screen area in square inches. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between PPI and PPI²?
A: PPI (Pixels Per Inch) is a linear measurement, while PPI² (Pixels Per Square Inch) is an area measurement that gives a more complete picture of pixel density.

Q2: What is a good PPI² value?
A: This depends on viewing distance. For smartphones, 300+ PPI² is generally considered good. For computer monitors, 100-200 PPI² is typical.

Q3: How do I calculate total pixels?
A: Multiply the horizontal resolution by the vertical resolution (e.g., 1920 × 1080 = 2,073,600 pixels).

Q4: Does higher PPI² always mean better quality?
A: Generally yes, but other factors like color accuracy, contrast ratio, and panel technology also affect perceived image quality.

Q5: How do I measure screen area?
A: Multiply the screen's width in inches by its height in inches. For diagonal measurements, use the formula: area = (diagonal² × aspect_ratio_width) / (aspect_ratio_width² + aspect_ratio_height²).