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Pixel density and pixel pitch calculator

Find a display’s pixel density from its resolution and diagonal size. The result also shows pixel pitch, width and height.

Free & no registration Calculated in your browser
01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

PPI = √(width² + height²) ÷ diagonal in inches; pixel pitch = 25.4 mm ÷ PPI

Worked example

A 24-inch display with 1,920 × 1,080 pixels has a density of approximately 91.79 PPI.

Things to check

  • The calculation assumes square pixels and the diagonal of the visible display area.
  • PPI measures display pixels per inch. DPI is a different measure used for a printing system’s dot resolution.