Projector 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.
A screen's "size" is its diagonal, but placement depends on width. For a 16:9 screen, width = diagonal × 0.872 and height = diagonal × 0.490. So a 100-inch screen is 87 inches (221 cm) wide and 49 inches (124 cm) tall.
Screen sizes are quoted as the diagonal, but throw distance, wall space and seating all depend on the width and height. The 16:9 ratio means width and height are fixed fractions of the diagonal. Use the table to size your wall and the calculator to size the throw.
16:9 screen dimensions by diagonal
| Diagonal | Width | Height |
|---|---|---|
| 80″ | 70″ | 39″ |
| 90″ | 78″ | 44″ |
| 100″ | 87″ | 49″ |
| 110″ | 96″ | 54″ |
| 120″ | 105″ | 59″ |
| 135″ | 118″ | 66″ |
| 150″ | 131″ | 74″ |
| 200″ | 174″ | 98″ |
Frequently asked questions
Related guides
Projector viewing distance
A common guide is to sit about 1.2 to 2 times the screen WIDTH away. For a 100-inch 16:9 screen (87 inches / 7.3 ft wide) that is roughly 9 to 15 feet. Closer is more immersive (THX); further is more relaxed (SMPTE).
GuidesProjector aspect ratios explained
Aspect ratio is the width-to-height shape of the image. 16:9 is standard for TV and most projectors; 16:10 suits business and data; 2.40:1 is cinemascope for movies; 4:3 is the old square format. At the same 100-inch diagonal, a wider ratio means a wider, shorter image.
GuidesHow to calculate projector throw distance
Throw distance = image width × throw ratio. First convert the screen diagonal to width (for 16:9, width = diagonal × 0.872), then multiply by the projector's throw ratio. For a 100-inch screen (87 inches wide) and a 1.5 throw ratio: 87 × 1.5 = 131 inches, about 11 feet.
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