Your room
Measure from the projector lens to the screen wall.
Check your projector’s spec sheet for its throw ratio, then fine-tune here.
Free forever — the same math we use planning media rooms.
The math behind it
Screen width = distance ÷ throw ratio
A projector 12 ft back with a 1.3 throw ratio makes an image about 110″ (96″ wide). Move it closer or pick a shorter-throw lens for the same screen in a smaller room.
The “size” is the diagonal
We turn that width into the diagonal everyone shops by (width ÷ 0.872 for 16:9) and the real height, so you can check it fits the wall. See our TV size & dimensions calculator for the screen geometry.
Light & lumens still matter
A bigger image spreads the same light thinner. In a room with windows you want more lumens or a slightly smaller screen — part of what we check when we design the room.
We’ll build the whole thing
Screenshot your result and call — we design and install projectors, screens, seating and sound across Bakersfield, indoors or in the backyard.
Call 661-412-4308 Free quote over the phone Our home theater service
More tools: TV size calculator · Projector installation