Method
Uses the Pythagorean theorem for diagonal pixels and divides by diagonal inches.
Utilities / browser toolScreen Resolution
Screen Resolution
& PPI Calculator
Estimate a display’s pixel density from resolution and diagonal size.
Use pixel dimensions and physical diagonal to calculate PPI.
Your inputs stay on your device
Calculate screen PPI
live resultEstimated PPI
Pixel aspect
Processing stays local in this browser.
Context & Reference
How it works
For estimating display pixel density from known dimensions.
calculator guideHow to use it
Use this calculator with your own values, then review the clearly labelled result and copy it when you need it elsewhere.
Understand the result
Estimated PPI and the entered pixel aspect are shown.
Example
Calculate PPI for 1920 × 1080 on a 13.3-inch diagonal.
Practical tip
The result depends on accurate physical measurements.
Notes
This calculator runs locally in this browser. The result depends on accurate physical measurements.
Useful next steps
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