Projector setup guides
The geometry behind projector placement, explained simply — with formulas, reference tables and real-model examples.
What is throw ratio?
Throw ratio is the projection distance divided by image width. Here is what it means, the formula, typical ranges, and how it sets how far a projector sits.
GuidesHow to calculate projector throw distance
Throw distance = image width × throw ratio. Here is the step-by-step formula, the 16:9 diagonal-to-width conversion, and a ready table by throw ratio.
GuidesProjector screen size guide
Convert any 16:9 projector screen diagonal to its real width and height, with a reference table for 80 to 200 inches in inches and centimetres.
GuidesShort throw vs ultra-short-throw vs standard
The three projector throw types explained by throw ratio — UST (below 0.4), short throw (0.4–1.0) and standard (1.0–2.0) — with where each sits and what it suits.
GuidesHow many lumens do I need?
The lumens you need depend on screen size and room light. A reference table by screen size for a dark room, a living room and a bright room.
GuidesProjector viewing distance
How far to sit from a projector screen, by size. A reference table of recommended seating distance for 80 to 200-inch 16:9 screens.
GuidesProjector aspect ratios explained
What projector aspect ratios mean and how each changes the image shape, with a table of width and height for a 100-inch screen in 16:9, 16:10, 2.40:1 and 4:3.
GuidesProjector vs TV
Projector vs TV compared — screen size, brightness, cost, lifespan and best use. A clear table to decide which suits your room.
GuidesANSI vs ISO vs LED lumens
Not all lumen ratings are equal. ANSI, ISO 21118, CVIA, LED and marketing lumens compared — which to trust when sizing a projector.
GuidesProjector ceiling mount height
How high to ceiling-mount a projector and screen — image height, lens offset, screen-bottom height and keystone, with a clear guideline table.
GuidesTrue 4K vs pixel-shift 4K
Native (true) 4K vs pixel-shift 4K (XPR) projectors compared — real pixels, sharpness, price and examples. Which 4K actually matters.