Projector Throw Distance Calculator
Throw ratio × image width = projector distance. Find where to place the projector for your screen size, in metres and feet.
Throw ratio is distance divided by image width, so a 1.5:1 projector needs 4.5 m of room to fill a 3 m screen. Run it backwards before booking a venue or buying a projector: divide the available distance by the ratio to see the biggest image the room allows. Short-throw (0.4–0.8) and ultra-short-throw (<0.4) lenses fill big screens from almost nothing — essential for conference rooms and rear-projection where space is tight. Zoom lenses give a ratio range (e.g. 1.2–1.8:1), which is your placement flexibility.
Rule / Formula
Throw ratio × image width = projector distance. Find where to place the projector for your screen size, in metres and feet.
About Projector Throw Distance Calculator
Throw ratio × image width = projector distance. Find where to place the projector for your screen size, in metres and feet. Throw ratio is distance divided by image width, so a 1.5:1 projector needs 4.5 m of room to fill a 3 m screen. Run it backwards before booking a venue or buying a projector: divide the available distance by the ratio to see the biggest image the room allows. Short-throw (0.4–0.8) and ultra-short-throw (<0.4) lenses fill big screens from almost nothing — essential for conference rooms and rear-projection where space is tight. Zoom lenses give a ratio range (e.g. 1.2–1.8:1), which is your placement flexibility.
How to use Projector Throw Distance Calculator
- 1Enter your values into the fields in Projector Throw Distance Calculator.
- 2The result and any pass/fail verdict update instantly as you type — no button to press.
- 3Check the substituted formula and worked example to see exactly how the result was derived.
- 4Copy or note the result for your spec, delivery or planning.
Why use Projector Throw Distance Calculator?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: Projection throw-ratio convention (AV industry).
- ✓Shows the governing formula and a worked example, so you can trust and check every result.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Projector Throw Distance Calculator do?+
Throw ratio × image width = projector distance. Find where to place the projector for your screen size, in metres and feet. Throw ratio is distance divided by image width, so a 1.5:1 projector needs 4.5 m of room to fill a 3 m screen.
Is my data private?+
Yes. Projector Throw Distance Calculator runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Projector Throw Distance Calculator based on?+
It follows Projection throw-ratio convention (AV industry); InfoComm/AVIXA projected-image system design. Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Projector Throw Distance Calculator uses: throw distance = throw ratio × image width. The tool shows this formula with your own numbers substituted so you can verify the result.
Is Projector Throw Distance Calculator free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Embed Projector Throw Distance Calculator on your website
Want Projector Throw Distance Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/projector-throw-distance-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Projector Throw Distance Calculator — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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