Screen pixels per inch calculator

How to use the Screen pixels per inch calculator

What does the Screen pixels per inch calculator do?

Estimate pixel density from resolution and diagonal size; It applies this page-specific rule: PPI equals diagonal pixel count divided by diagonal screen size in inches.

Which inputs does this calculator use?

To estimate pixel density from resolution and diagonal size, enter Horizontal pixels, Vertical pixels, Diagonal inches; keep every value in the same example; select Calculate when the values are ready; Start with a familiar case covered by this rule - Diagonal pixels are calculated from horizontal and vertical resolution with the Pythagorean theorem - so the expected result can confirm the settings.

How should the calculator result be read?

For a result intended to estimate pixel density from resolution and diagonal size, diagonal pixels are calculated from horizontal and vertical resolution with the Pythagorean theorem; read diagonal inches together with the original horizontal pixels rather than as an isolated answer, and confirm that its units or structure match the intended use.

What calculation does this use?

When the goal is to estimate pixel density from resolution and diagonal size, PPI equals diagonal pixel count divided by diagonal screen size in inches.

Why might a real result differ?

When using the page to estimate pixel density from resolution and diagonal size, advertised panel size and active display area can differ slightly.

Limits and accuracy

When using this calculator to estimate pixel density from resolution and diagonal size, advertised panel size and active display area can differ slightly; the result is an estimate unless every source value is known; codecs, metadata, overhead, and variable bitrates can change an actual file; keep horizontal pixels until the output has been checked in its intended destination. For a repeatable check when you need to estimate pixel density from resolution and diagonal size, record Horizontal pixels alongside the final output and selected options.