Tools · Calculator
Projector throw, solved.
Set your screen size and where the projector can mount, and we'll work out the throw ratio, which class of projector fits, and how bright it needs to be — drawn to scale so the geometry is obvious.
Not sure a projector is right? Compare with the TV size calculator →
Diagram drawn to scale · drag the sliders to update
Image size 8.7 × 4.9 ft width × height
Throw ratio needed 1.49 distance ÷ width
Projector type Standard throw most common
Brightness needed 700–2,150 lumens · dark → ambient
Where each projector type would sit
For a 120" 16:9 screen (8.7 ft wide):
| Projector type | Throw ratio | Distance for this screen |
|---|---|---|
| Ultra-short throw (UST) | 0.25 – 0.4 | — |
| Short throw | 0.4 – 1.0 | — |
| Standard throw | 1.0 – 2.0 | — |
| Long throw | 2.0 – 3.0 | — |
Most dedicated home-theater projectors are standard throw with a zoom lens, giving flexibility within that range. Ultra-short throw units sit on a credenza right below the screen — ideal when a long ceiling run isn't possible.
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