Display Pixel Density (PPI/DPI) Calculator

Display Pixel Density (PPI/DPI) Calculator

Local Processing

Calculate screen pixel density (pixels per inch PPI) from resolution and diagonal screen size.

How It Works & Processing Standards

Enter values above to calculate results automatically. Check each input field for guidance and units.

Example: Horizontal Pixels (Width) = 1920, Vertical Pixels (Height) = 1080, Diagonal Screen Size (Inches) = 24 → 91.787799

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PPI = √(width² + height²) ÷ diagonal inches. Higher means sharper at the same viewing distance.

How to Use Display Pixel Density (PPI/DPI) Calculator

  1. 1
    Enter the resolutionWidth and height in pixels.
  2. 2
    Enter the sizeThe diagonal in inches — 27 for a 27" monitor.
  3. 3
    Read the PPIPixels per inch.

Examples

24" Full HD monitor
Input: 1920 × 1080, 24"
Result: 91.7877987534
6.1" smartphone
Input: 2532 × 1170, 6.1"
Result: 457.254346312

Common Use Cases

  • Comparing sharpness across monitor sizes
  • Estimating how a design will look on a real device
  • Comparing print and screen resolution

Frequently Asked Questions (FAQ)

Are PPI and DPI the same?

Screens use PPI (pixels per inch) and printing uses DPI (dots per inch); the calculation is the same.

What if the size is in centimeters?

Divide by 2.54 to get inches, or use the Length Converter.

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