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Pixel Density (PPI) Calculator

Result

Calculated result 3.6055512755 Based on the values entered.
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Pixel Density (PPI) Calculator — free online calculator.

Formula

Diagonal (px) = √(width² + height²)
  • Pixel Density (PPI) Calculator calculates its result from Width, Height. It uses the formula Diagonal (px) = √(width² + height²). Change any input to recalculate the result instantly.
  • The main inputs are Width, Height. Enter them in the units and format shown in the calculator.
  • Keep comparable quantities in compatible units whenever the formula combines or compares them.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Pixel Density (PPI)

Inputs
  • Width: 2
  • Height: 3

Using Width = 2, Height = 3, the calculated result is 3.6055512755.

Sample result: Calculating…

Frequently asked questions

What does the Pixel Density (PPI) calculate?

Pixel Density (PPI) Calculator — free online calculator.

Which values should I enter?

Enter Width, Height using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Diagonal (px) = √(width² + height²).

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026