PPI Calculator
Use this ppi calculator to calculate pixel density for a display. Enter screen resolution and physical screen size and review pixels per inch and related display information.
Pixel density
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Dot pitch —
Sharpness —
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How it works
PPI = √(width² + height²) ÷ diagonal size in inchesHow to use the PPI Calculator
Start by entering screen resolution and physical screen size. Keep the units consistent and check that each value belongs to the same question.
The result gives pixels per inch and related display information. The result depends on diagonal size and the resolution entered. Use it as a guide and check any instructions, rules or professional advice that apply.
Frequently Asked Questions
What does this ppi calculator calculate?
It gives pixels per inch and related display information. The result depends on diagonal size and the resolution entered.
What information should I enter?
Enter screen resolution and physical screen size. Use the same units throughout so the result is easier to understand.
Does higher PPI always mean a better screen?
It can make details look sharper, but viewing distance and display quality also matter.