Projector Throw & Screen Size Calculator
Work out the image size a projector gives at a distance from its throw ratio, or the distance for a screen width.
From the projector datasheet (distance divided by image width).
Results
Image width: 3.00 m
Image height: 1.69 m
Image diagonal: 136 in
Distance for a 2.5 m wide image: 3.75 m
Zoom lenses have a throw-ratio range -- run the numbers at both ends of it.
How it works
Image width is the throw distance divided by the throw ratio; the height follows from the aspect ratio and the diagonal from both. The distance for a given screen width is that width x the throw ratio.
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