16:9 Projector Screen Dimensions: 84"-150" Size Chart
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The one-paragraph answer: Projector screens are sold by diagonal, but what you need to know before buying is width and height. A 16:9 screen's width is 87.16% of its diagonal and its height is 49.03%, so a 100" screen is 87.2" × 49.0" (221 × 124 cm) and a 150" screen is 130.7" × 73.5" (332 × 187 cm). Measure your wall for the image first, then add clearance for the housing — a motorized screen's case is wider than the image, and an in-ceiling screen also needs space behind the ceiling. The chart below covers every size from 84" to 150".
16:9 screen dimensions chart
These figures are for a 16:9 image area — the lit part of the screen. Width and height are exact for that aspect ratio; centimetre and foot values are rounded.
| Diagonal | Width (in) | Height (in) | Width (cm) | Height (cm) | Width (ft) | Height (ft) | Image area (sq ft) |
|---|---|---|---|---|---|---|---|
| 84" | 73.2 | 41.2 | 186 | 105 | 6.1 | 3.4 | 20.9 |
| 92" | 80.2 | 45.1 | 204 | 115 | 6.7 | 3.8 | 25.1 |
| 100" | 87.2 | 49.0 | 221 | 124 | 7.3 | 4.1 | 29.7 |
| 110" | 95.9 | 53.9 | 244 | 137 | 8.0 | 4.5 | 35.9 |
| 120" | 104.6 | 58.8 | 266 | 149 | 8.7 | 4.9 | 42.7 |
| 133" | 115.9 | 65.2 | 294 | 166 | 9.7 | 5.4 | 52.5 |
| 150" | 130.7 | 73.5 | 332 | 187 | 10.9 | 6.1 | 66.8 |
Quick answers for the sizes people search most
- 100 inch screen: 87.2" wide, 49.0" tall — 7 ft 3 in × 4 ft 1 in.
- 120 inch screen: 104.6" wide, 58.8" tall — 8 ft 8.6 in × 4 ft 10.8 in.
- 150 inch screen: 130.7" wide, 73.5" tall — 10 ft 10.7 in × 6 ft 1.5 in.
Where the numbers come from
For a 16:9 screen, width and height are fixed multiples of the diagonal:
- width = diagonal × 0.8716
- height = diagonal × 0.4903
Those two constants come straight from the 16:9 ratio (the diagonal is the hypotenuse of a 16-by-9 triangle). Check it against a familiar number: 16² + 9² = 337, and √337 = 18.36. So width = diagonal × 16 / 18.36 = 0.8716 × diagonal, and height = diagonal × 9 / 18.36 = 0.4903 × diagonal.
That is why the numbers scale linearly. A 120" screen is not "a bit bigger" than a 100" screen — it is 20% wider and has 44% more image area (42.7 sq ft versus 29.7 sq ft). Size jumps feel bigger than they look on paper.
Image width is not the same as screen width
This is the mistake that turns into a return.
The table above describes the lit image. The physical product is bigger:
- A motorized screen has a housing. The case has to be at least as wide as the image, usually wider, plus the motor end. If your wall fits a 120" image with nothing to spare, a 120" motorized screen will not fit there.
- An in-ceiling screen needs a ceiling cavity. The housing sits above the ceiling line, so the space behind the ceiling matters as much as the visible opening.
- A recessed screen needs a slot, not just a wall. Plan the opening width and the cavity depth before drywall goes up.
Before you order, measure three things: the wall width available, the height from the intended top of the image to the floor, and — for ceiling formats — the cavity space. If any of them is tight, go one size down rather than hoping. Our in-ceiling vs surface-mount vs rechargeable comparison explains how each format installs.
How far should you sit?
Two rules of thumb cover most rooms:
- Comfortable cinema seating: viewing distance of about 1.5× the image width. For a 100" screen (87.2" wide) that is roughly 11 ft. For 120" (104.6" wide), about 13 ft.
- Immersive, THX-style seating: around 1.2× the image width, which for the same 100" screen is about 8.7 ft. Closer, more cinematic, more demanding on projector brightness.
If your seats are further back than 2× the width, the image will feel small — that is usually a sign to go up a size, not to move furniture.
How high should the screen go?
The common rule: your eyes should land about one-third up from the bottom of the image when you are seated in your usual spot.
In practice that means the bottom edge of a 120" screen usually sits somewhere around 24–30" off the floor in a room with standard seating height — but measure your own eye height in your own seat rather than trusting a number from the internet. This matters more for ceiling-mounted screens, because the housing and its drop length are fixed once installed.
Which sizes we build
Our whole range is tab-tensioned and 16:9, but the size range depends on the surface:
| Surface | Sizes | Collections |
|---|---|---|
| Matte white, for UST projectors | 84"–150" | Ultra Short Throw Screens |
| Fresnel ALR (long-throw) | 84"–120" | Fresnel ALR Screens |
| High-contrast gray | 84"–120" | Electric Wall/Ceiling · In-Ceiling · Battery-Powered |
| White anti-speckle | 84"–120" | Electric Wall/Ceiling · In-Ceiling · Battery-Powered |
The 150" option exists only on the UST matte white surface, in all three install formats. If you need 150" with lights-on performance, tell us what you are trying to light — a Fresnel ALR surface at that size is a different class of build, and we would rather point you somewhere honest than sell you a 150" screen that cannot do the job.
Frequently asked questions
What are the dimensions of a 150 inch projector screen?
For 16:9, a 150" screen is 130.7" wide and 73.5" tall — about 10 ft 11 in × 6 ft 1.5 in, or 332 × 187 cm. Add the housing width for a motorized version.
What are the dimensions of a 120 inch projector screen in feet?
A 120" 16:9 screen measures about 8.7 ft × 4.9 ft (104.6" × 58.8"). Check the wall for at least 8.9–9 ft of clear width before ordering a motorized version.
How wide is a 100 inch projector screen?
87.2 inches (221 cm) for a 16:9 screen. The height is 49.0 inches (124 cm).
Is a 120 inch screen too big for a living room?
Not if your seating is around 13 ft back and the wall has the width. At 120" you need roughly 9 ft of clear wall for a motorized screen, and about 11 ft of viewing distance for comfortable cinema seating. If your room is shorter, a 100" screen with closer seats will look better than a 120" screen you cannot sit far enough from.
Does screen size affect brightness?
Yes, a lot. The same projector lighting a 120" screen instead of a 100" has to cover 44% more area, so the image is noticeably dimmer. This is the main reason the size decision and the surface decision belong together — see the complete guide to ALR screens if you are choosing a surface at the same time.