Screen Innovations offers four online “wizards.” Begin with the Projector Wizard, and choose the projector brand and model from an exhaustive list. The Screen Calculator shows options of Screen Innovations, screen types. After you determine your screen size and projector use the Screen Wizard to help you select the correct
screen material for your application. From there, the Seating Distance Calculator has a handy “click and drag” the number of people in the audience, to determine the distance to the screen. No login required.
http://www.screeninnovations.com/tools/projector-wizard/
