Projector and home theater calculator
Calculate projector screen width, height, area, and viewing distance from diagonal size and aspect ratio.
Screen size
87.2 × 49.0 in
100 in diagonal, 16:9 aspect ratio
29.7 sq ft
104.6 in
8.2–12.3 ft
16:9 screen shape
Best default for streaming, gaming, presentations, and most home theater setups.
Useful for cinema-style setups, but room width and projector support matter more.
Throw distance is approximately screen width multiplied by projector throw ratio.
How to use it
Use the projector screen calculator to turn diagonal size and aspect ratio into real screen width, height, area, throw distance, and viewing-distance guidance. It is useful before buying a screen, mounting a projector, or planning a room layout.
Limitation: The calculator estimates geometry. Always check your projector manual for throw range, zoom, lens shift, brightness, mounting limits, and keystone constraints.
A 100-inch 16:9 screen is about 87 inches wide and 49 inches tall.
A 120-inch screen needs more wall width, more viewing distance, and usually stronger brightness.
A short-throw projector can sit much closer than a standard projector with the same screen size.
A 100-inch 16:9 projector screen is about 87 inches wide and 49 inches tall. The exact size changes with aspect ratio.
16:9 is the safest default for streaming, gaming, and presentations. 21:9 can work well for cinema rooms if the projector and room support it.
Throw ratio is the projector distance divided by screen width. Multiply screen width by throw ratio to estimate placement distance.
Helpful references
Compare projector dimensions with monitor, TV, viewport, and screen-size references.
Guide collection
Use these supporting guides to understand the tool result and next testing steps.
Continue with another ScreenMetricLab utility.
Need more screen sizing help? Explore device viewport sizes, compare popular screens, or read our screen and viewport guides.
