1. What is Pixels to mm Conversion?

The Pixels to mm conversion calculates the physical size of a digital image or element when printed or displayed based on its resolution (PPI - pixels per inch). This is essential for designers, printers, and anyone working with digital-to-physical size conversions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( pixels \) — Number of pixels in the digital image
• \( ppi \) — Pixels per inch (resolution)
• \( 25.4 \) — Conversion factor (inches to mm)

Explanation: The formula first converts pixels to inches by dividing by PPI, then converts inches to millimeters by multiplying by 25.4 (since 1 inch = 25.4 mm).

3. Importance of Resolution Calculation

Details: Accurate pixel-to-mm conversion is crucial for print design, screen manufacturing, web-to-print workflows, and ensuring elements appear at the correct physical size in the final output.

4. Using the Calculator

Tips: Enter the number of pixels and the PPI (pixels per inch) value. Common PPI values are 72 (web), 300 (print), or the specific PPI of your display/printing device.

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 do I find my screen's PPI?
A: Calculate it using screen resolution and physical size: PPI = √(width² + height²) / diagonal size in inches.

Q3: Why 25.4 in the formula?
A: There are exactly 25.4 millimeters in one inch, which is the standard conversion factor.

Q4: Does this work for all display types?
A: Yes, but remember that different displays may have different PPI values, affecting the actual physical size when viewed.

Q5: How accurate is this conversion for printing?
A: Very accurate, assuming you know the exact PPI/DPI of your printing device and account for any scaling in the print process.