1. What is Pixel Size Conversion?

Pixel size conversion is the process of converting physical measurements (millimeters) to digital pixel dimensions based on screen resolution (PPI - pixels per inch). This is essential for accurate digital design and display across different devices.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( mm \) — Measurement in millimeters
• \( PPI \) — Pixels per inch (screen resolution)
• \( 25.4 \) — Conversion factor (mm per inch)

Explanation: The formula converts millimeters to inches (by dividing by 25.4), then multiplies by the PPI to get the pixel dimension.

3. Importance of Pixel Conversion

Details: Accurate pixel conversion ensures designs appear at the correct physical size across different devices with varying screen densities. This is crucial for UI/UX design, printing, and digital media production.

4. Using the Calculator

Tips: Enter the millimeter measurement and the PPI (pixels per inch) of your target display. Common PPI values include 72 (web), 96 (Windows default), 163 (mobile), and 300-600 (high-res displays).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between PPI and DPI?
A: PPI (pixels per inch) refers to screen resolution, while DPI (dots per inch) refers to printer resolution. For digital design, use PPI.

Q2: Why 25.4 in the formula?
A: There are exactly 25.4 millimeters in one inch, which is the standard conversion factor.

Q3: How do I find my screen's PPI?
A: Divide your screen's pixel width by its physical width in inches. Many devices list this in their specifications.

Q4: Does this work for converting pixels back to mm?
A: Yes, the reverse formula is: \( mm = \frac{Pixels \times 25.4}{PPI} \)

Q5: Is this accurate for all screens?
A: It's theoretically accurate, but actual display size may vary slightly due to manufacturing tolerances and software scaling.