1. What is Pixel Size?

Pixel size refers to the physical dimensions of a single pixel in a digital display or image sensor. It's calculated based on the resolution (pixels per inch) and determines how small individual points of light or color can be.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( \text{pixel\_size} \) — Physical size of one pixel in millimeters
• \( \text{resolution} \) — Display or sensor resolution in pixels per inch (PPI)
• 25.4 — Conversion factor (millimeters per inch)

Explanation: The equation converts resolution from PPI to pixels per millimeter, then inverts it to get the size of one pixel in millimeters.

3. Importance of Pixel Size Calculation

Details: Knowing pixel size is crucial for display quality assessment, image sensor design, and understanding the relationship between digital resolution and physical dimensions.

4. Using the Calculator

Tips: Enter the resolution in pixels per inch (PPI). Common values range from 72 PPI (older displays) to 400+ PPI (modern smartphones).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between PPI and DPI?
A: PPI (pixels per inch) refers to digital resolution, while DPI (dots per inch) refers to printer resolution. They're often used interchangeably but are technically different.

Q2: How does pixel size affect image quality?
A: Smaller pixel sizes generally allow for higher resolution and sharper images, but can reduce light sensitivity in cameras.

Q3: What's a typical pixel size for smartphone displays?
A: Modern smartphones typically have pixel sizes around 0.05-0.1 mm (100-200 PPI for tablets, 300-500 PPI for phones).

Q4: How does this relate to pixel pitch?
A: Pixel size is essentially the same as pixel pitch - the center-to-center distance between pixels.

Q5: Can I calculate resolution from pixel size?
A: Yes, by rearranging the formula: resolution = 25.4 / pixel_size (in mm).