Screen PPI Calculator

Pixels Per Inch (PPI) — also called pixel density — measures how many pixels fit into one linear inch of a display. Higher PPI means sharper images

The calculator uses the standard published formula for screen ppi. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Diagonal pixel count = √(width² + height²) in pixels. Each step in the calculation is shown so you can verify the result manually.