Distance from lens to screen as throw ratio times image width.
| Throw | – |
Use this calculator to place a projector from its throw ratio and the desired image width. Enter the ratio and the image width. Width can be metres (m) or feet (ft); the result is shown in the same unit.
Throw = ratio × width. Ratio 1.5 on a 2.4 m wide image wants 3.6 m. Zoom lenses have a range of ratios; use the end you care about. Offset, keystone, and ceiling mounts are extra.
Throw ratio: Throw distance divided by image width.
Width: Image width. Enter m or ft.
Throw: Lens-to-screen distance in the same unit as width.
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