1. What is PPI?

PPI (Pixels Per Inch) is a measurement of pixel density that indicates how many pixels are present in one linear inch of a digital display. It's an important factor in determining image quality and sharpness.

2. How Does the Calculator Work?

The calculator uses the PPI equation:

Where:

• \( width \) — Display width in pixels
• \( height \) — Display height in pixels
• \( diagonal \) — Screen diagonal size in inches

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

3. Importance of PPI Calculation

Details: PPI is crucial for understanding display quality. Higher PPI means sharper images and text. It's especially important for water-related applications where display clarity might affect readability in various conditions.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's a good PPI for water-resistant displays?
A: For outdoor or water-exposed displays, higher PPI (300+) is recommended for better visibility in various conditions.

Q2: How does PPI relate to water resistance?
A: While PPI doesn't directly affect water resistance, higher PPI displays often have better protective coatings that can enhance water resistance.

Q3: Does water affect PPI measurement?
A: Water on the display surface might temporarily affect perceived sharpness but doesn't change the actual PPI of the screen.

Q4: Are there special PPI considerations for underwater displays?
A: Underwater displays might require higher PPI to compensate for light refraction in water.

Q5: How does PPI affect water-related applications?
A: In marine navigation systems or water quality monitoring displays, higher PPI ensures better readability of critical data.