A worked example
100-inch 16:9 screen is about 221.38 × 124.53 cm.
Screen dimensions
Calculate physical screen width and height from diagonal and aspect ratio.
YOUR LITTLE WORKBENCH
ON YOUR DEVICE ✦Screen dimensions
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THE METHOD / 01
A clear wayfrom start to finish.
Width = diagonal × a/√(a²+b²); height = diagonal × b/√(a²+b²). Convert inches to cm with 2.54.
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.
02
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 tool04
Pixel density
Compute display PPI and physical pixel pitch from pixel dimensions and diagonal.
Open tool