A worked example
1920 × 1080 over a 100-inch diagonal gives about 22.029 PPI.
Pixel density
Compute display PPI and physical pixel pitch from pixel dimensions and diagonal.
YOUR LITTLE WORKBENCH
ON YOUR DEVICE ✦Pixel density
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THE METHOD / 01
A clear wayfrom start to finish.
PPI = √(pixel width² + pixel height²) ÷ diagonal inches. Pixel pitch in mm = 25.4 ÷ PPI.
Keep the assumptions clear
Assumes square pixels and that the full pixel grid fills the diagonal. No viewing-distance recommendation.
A FEW USEFUL ANSWERS
Good to know.
Are my inputs uploaded?
No. Processing runs locally in your browser. The host still receives normal requests for website pages and assets.
Can I keep my result?
Use the download controls for the current tool or print from your browser. Your valid edits autosave in this browser. Export a JSON backup to move devices; see the privacy page.
Do I need an account?
No sign-up, paid API or subscription is required. Both languages use the same tools. English always opens at the root address.
VIEWKIND / TOOLKIT
A little help for every step.
01
Screen dimensions
Calculate physical screen width and height from diagonal and aspect ratio.
Open tool02
Throw distance
Calculate a geometric lens-to-screen distance from your projector’s stated throw ratio.
Open tool03
Image fit
Fit source pixels inside a fixed rectangular display without cropping.
Open tool