1. What is PPI?

PPI (Pixels Per Inch) is a measurement of the pixel density of a screen or digital image. It indicates how many pixels are packed into one inch of display space. For a 2560×1440 resolution display, PPI varies based on the screen size.

2. How Does the Calculator Work?

The calculator uses the PPI formula:

Where:

• \( width \) — Horizontal resolution (2560 pixels for this calculator)
• \( height \) — Vertical resolution (1440 pixels for this calculator)
• \( diagonal \) — Screen diagonal size in inches

Explanation: The formula calculates the diagonal pixel count (using Pythagorean theorem) and divides by the physical screen size to get pixel density.

3. Importance of PPI Calculation

Details: PPI is crucial for understanding display sharpness and quality. Higher PPI means sharper images and text. For 2560×1440 resolution, PPI determines how crisp the image will appear at different screen sizes.

4. Using the Calculator

Tips: Simply enter your screen's diagonal size in inches. The calculator will compute the PPI for a 2560×1440 resolution display of that size.

5. Frequently Asked Questions (FAQ)

Q1: What's a good PPI for a monitor?
A: For desktop monitors, 90-110 PPI is common. Higher PPI (110+) offers sharper images but may require scaling for comfortable reading.

Q2: How does 2560×1440 compare to 1080p?
A: 2560×1440 (QHD) has 1.77× more pixels than 1920×1080 (Full HD), offering significantly sharper images at similar screen sizes.

Q3: Does PPI affect gaming performance?
A: Yes, higher PPI (smaller screens at same resolution) means pixels are smaller and harder to see individual pixels, but requires more GPU power to drive.

Q4: What's the PPI of a 27-inch 2560×1440 monitor?
A: Approximately 109 PPI (this is a popular combination offering good balance of size and sharpness).

Q5: Can I use this for other resolutions?
A: This calculator is specifically for 2560×1440 resolution. The formula works for any resolution but the width and height values would need to change.