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Projector Throw Distance Calculator
Calculate lens-to-screen distance range from image diagonal,aspect and lens throw ratios.
Image diagonal (inches), Aspect width, Aspect height, Minimum lens throw ratio, Maximum lens throw ratio
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the labelled values using the displayed units and explicit assumptions.
- Choose Calculate result and review the complete report and any undefined or no-solution states.
- Choose Download result to save the complete JSON. Reset clears the result and restores example controls.
Examples
Image diagonal (inches): 100
Aspect width: 16
Aspect height: 9
Minimum lens throw ratio: 1.2
Maximum lens throw ratio: 1.5
Limitations
- Positive diagonal inches,aspect width/height,min/max throw ratio with min<=max. Full native image width,flat screen,ideal geometry. Report image width/height/diagonal m and lens-distance range. No model lookup,lens shift,UST chassis clearance,brightness,mounting or image-quality recommendation.
- Scalar controls accept explicit finite decimal syntax;positive values normally1e-12–1e12,nonnegative0–1e12 unless a narrower range is stated. JSON numeric rows use finite IEEE754 values within their stated bounds. Derived counts above1billion and nonfinite results refuse. Combined input<=400000UTF8 bytes;complete JSON<=4MiB. All processing stays in your browser.
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