1. What is Pixel Size?

Pixel size refers to the physical dimensions of an individual pixel in a digital display or image sensor. It's calculated by dividing the physical size of the display/sensor by the number of pixels along that dimension.

2. How Does the Calculator Work?

The calculator uses the pixel size formula:

Where:

• Physical Size — The actual physical dimension of the display or sensor (in millimeters)
• Pixels — The number of pixels along the measured dimension

Explanation: This calculation determines how large each individual pixel is in physical space, which affects display quality and pixel density.

3. Importance of Pixel Size Calculation

Details: Pixel size is crucial for understanding display resolution, image quality, and pixel density (PPI). Smaller pixel sizes generally result in higher resolution and sharper images, but can also affect light sensitivity in sensors.

4. Using the Calculator

Tips: Enter the physical size in millimeters and the number of pixels along that dimension. Both values must be positive numbers (physical size > 0, pixels ≥ 1).

5. Frequently Asked Questions (FAQ)

Q1: How does pixel size relate to PPI (Pixels Per Inch)?
A: PPI is calculated as 25.4 divided by pixel size (in mm). Smaller pixel size results in higher PPI.

Q2: What's a typical pixel size for smartphone displays?
A: Modern smartphone displays typically have pixel sizes between 0.05-0.15 mm, resulting in PPIs of 300-500+.

Q3: How does pixel size affect image sensors?
A: Larger pixels in image sensors generally capture more light, resulting in better low-light performance, while smaller pixels allow for higher resolution in the same sensor size.

Q4: Can I calculate pixel size for both width and height?
A: Yes, you can calculate separately for both dimensions, though most displays have square pixels with equal size in both directions.

Q5: What units are used for pixel size measurement?
A: Pixel size is typically measured in micrometers (μm) or millimeters (mm), with 1 mm = 1000 μm.