This calculates the distance a projector must be from a screen.
Enter setup information:

Number of projectors: horiz vert (ex. 2 horiz and 1 vert is typical wide screen multi projector display)

Projector Resolution: horiz vert (ex. 1024 x 768)

Overlap, in %: horiz vert (ex. 10 and 0 would show 2 projectors, side by side overlaping 10%)

Lens Zoom: min max (ex. 2 x 2.6)

Screen Width: Measurement: