This calculator is provided as a tool to help you determine the brightness necessary for your installation. Perception of brightness is subjective and lumens alone doesn’t tell the whole picture. Different light engines have different perceptual brightness.

This calculator is not designed for installation pre-planning, as it doesn’t factor in projector minimum/maximum focus range, vertical offest, or mounting location. If you know what projector you will use, Projector Central is a great place to look up specs. For complex installations or tight spaces, Mapping Matter is a great solution for planning installation & pre-visualizing.