Calculateur de Projector Screen Size
Estimate projected image size from throw distance, throw ratio, and aspect ratio.
Formula and method
This calculator computes Image width, Image height, Image diagonal directly in your browser without sending data to an external server.
Mathematical formula
- Image width:
distance ÷ throwRatio - Image height:
distance ÷ throwRatio × ratioH ÷ ratioW - Image diagonal:
√(distance ÷ throwRatio²+distance ÷ throwRatio × ratioH ÷ ratioW²)
Variables and parameters
- Throw distance (distance): default value 12 ft.
- Throw ratio (throwRatio): default value 1.2.
- Aspect width (ratioW): default value 16.
- Aspect height (ratioH): default value 9.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Projector Screen Size Calculator use?
Projector Screen Size Calculator evaluates outputs such as <strong>Image width, Image height, Image diagonal</strong> based on inputs including Throw distance, Throw ratio, Aspect width, Aspect height. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Projector Screen Size Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Projector Screen Size Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Projector Screen Size Calculator free to use?
Yes. Projector Screen Size Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Projector Screen Size Calculator store or upload my data?
No. Projector Screen Size Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Projector Screen Size Calculator?
Projector Screen Size Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Projector Screen Size Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Projector Screen Size Calculator to your own blog post or page.