Projector Screen Sizes: Dimensions, Seating Distance and Throw
For anyone sizing a screen for a home theater, a living room or a classroom. The chart gives the viewable area of each standard size; the sections after it cover frames, ceiling height, seating and where the projector has to go.
Projector screens are measured on the diagonal of the viewable area. A 100-inch 16:9 screen is 87.2 × 49.0 in (221.4 × 124.5 cm), a 120-inch is 104.6 × 58.8 in (265.7 × 149.4 cm), and a 150-inch is 130.7 × 73.5 in (332 × 187 cm). A fixed frame adds about 2 to 3 in on each side.
- 100 in, 16:9
- 87.2 × 49.0 in
- 120 in, 16:9
- 104.6 × 58.8 in
- Seating for 100 in
- 10–13.6 ft (3–4.1 m)
- Most common size
- 100–120 in
On this page
Projector screen sizes chart (16:9)
16:9 is the format for streaming, TV, Blu-ray and games, and the default for home screens. Each size below is the viewable picture area, measured inside any black border.
| Diagonal | Width × height (in) | Width × height (cm) | Width × height (ft) | Typical room |
|---|---|---|---|---|
| 80 in | 69.7 × 39.2 | 177 × 100 | 5.8 × 3.3 | Bedroom, small office |
| 92 in | 80.2 × 45.1 | 204 × 115 | 6.7 × 3.8 | Small living room |
| 100 in | 87.2 × 49.0 | 221 × 125 | 7.3 × 4.1 | Living room |
| 106 in | 92.4 × 52.0 | 235 × 132 | 7.7 × 4.3 | Living room, den |
| 110 in | 95.9 × 53.9 | 244 × 137 | 8.0 × 4.5 | Media room |
| 120 in | 104.6 × 58.8 | 266 × 149 | 8.7 × 4.9 | Dedicated home theater |
| 135 in | 117.7 × 66.2 | 299 × 168 | 9.8 × 5.5 | Large theater, basement |
| 150 in | 130.7 × 73.5 | 332 × 187 | 10.9 × 6.1 | Large room, small hall |
The sizes follow the same math as TVs: width is 0.872 × the diagonal and height 0.490 × the diagonal. A 100-inch screen is effectively the same picture as a 98 to 100-inch TV; the 98-inch TV guide covers that comparison, and the screen size guide explains the diagonal math for any ratio.
Projector screen sizes in other aspect ratios
The same diagonal gives a very different shape in each format. At 100 inches:
| Aspect ratio | Width × height (in) | Width × height (cm) | Area | Used for |
|---|---|---|---|---|
| 16:9 | 87.2 × 49.0 | 221.4 × 124.5 | 4,273 sq in | Home video, gaming, sports |
| 16:10 | 84.8 × 53.0 | 215.4 × 134.6 | 4,494 sq in | Business projectors (WXGA, WUXGA), presentations |
| 4:3 | 80.0 × 60.0 | 203.2 × 152.4 | 4,800 sq in | Classrooms, older projectors |
| 2.35:1 | 92.0 × 39.2 | 233.7 × 99.5 | 3,603 sq in | Widescreen films (CinemaScope) |
| 1:1 (square) | 70.7 × 70.7 | 179.6 × 179.6 | 5,000 sq in | Pull-down school and office screens |
Square screens are often sold by side length rather than diagonal: a "70 × 70 in" screen is a 99-inch diagonal, and an "84 × 84 in" screen is 119 in. They suit rooms where the projector's format changes, since you can show 4:3 or 16:9 on them, but either way part of the surface stays unused.
Matching a 2.35:1 screen to a 16:9 one
Cinema-format screens are planned by height, not diagonal. To show films wider than a 100-inch 16:9 screen without losing height, you need a 2.35:1 screen 49.0 in tall, which is 115.2 in wide and 125 in diagonal. For a 120-inch 16:9 equivalent (58.8 in tall), the 2.35:1 screen is about 138 in wide, a 150-inch diagonal. Filling that width requires a projector with a lens memory or anamorphic lens; otherwise 16:9 content sits in the middle with blank sides.
How much wall a projector screen needs
The size on the box is the picture. The frame or housing adds to it, and the wall has to take the whole thing.
- Fixed frame: the black frame is typically 2 to 3 in wide. Elite Screens' Sable Frame 2 at 100 in, for example, has an 87.2 × 49.0 in viewing area and measures about 92 × 53.8 in overall with its 2.4 in frame.
- Pull-down and motorized: the case is longer than the screen is wide, to hold the roller and end caps, and many have extra black "drop" above the picture so the image starts lower. Check the case length and drop in the spec sheet.
- Portable tripod and floor-rising screens: need floor space in front of the wall for the legs or case, and the picture bottom usually sits higher than on a wall-mounted screen.
Ceiling height
For comfortable viewing, the bottom of the picture should be roughly 24 to 36 in (60–90 cm) above the floor. Add the screen height and the frame to see what fits:
| 16:9 screen | Picture height | Top of picture | Fits under |
|---|---|---|---|
| 100 in | 49.0 in (125 cm) | 77 in (196 cm) | 7 ft ceiling |
| 120 in | 58.8 in (149 cm) | 87 in (221 cm) | 8 ft ceiling |
| 135 in | 66.2 in (168 cm) | 94 in (239 cm) | 9 ft ceiling, comfortably |
| 150 in | 73.5 in (187 cm) | 102 in (258 cm) | 9 ft ceiling |
A 150-inch screen fits under a standard 8 ft ceiling only if the bottom of the picture drops to about 20 in, which puts much of the picture below the heads of a second row.
Choosing a projector screen size by seating distance
The same viewing-angle guidelines used for TVs apply. THX recommends a 40° field of view for an immersive picture; SMPTE guidance sets 30° as a minimum. For 16:9 screens:
| Screen | THX 40° (closest) | SMPTE 30° (farthest) |
|---|---|---|
| 80 in | 8.0 ft (2.4 m) | 10.8 ft (3.3 m) |
| 92 in | 9.2 ft (2.8 m) | 12.5 ft (3.8 m) |
| 100 in | 10.0 ft (3.0 m) | 13.6 ft (4.1 m) |
| 110 in | 11.0 ft (3.3 m) | 14.9 ft (4.5 m) |
| 120 in | 12.0 ft (3.6 m) | 16.3 ft (5.0 m) |
| 135 in | 13.5 ft (4.1 m) | 18.3 ft (5.6 m) |
| 150 in | 15.0 ft (4.6 m) | 20.3 ft (6.2 m) |
For a 16:9 screen, divide your seating distance in inches by 1.2 to get the largest comfortable diagonal, and by 1.6 for the smallest. At 11 ft (132 in): 132 ÷ 1.2 = 110 in, and 132 ÷ 1.6 = 82 in.
Resolution matters less than people expect at these distances. A 4K picture on a 120-inch screen has pixels about 0.027 in apart, small enough to be invisible to 20/20 vision from about 7.8 ft. With a 1080p projector that distance doubles to about 15.6 ft, the far end of the 12 to 16 ft seating range for a 120-inch screen, so 1080p looks visibly softer from the closer seats.
Throw distance: where the projector goes
A projector's throw ratio is the distance from lens to screen divided by the picture width. Multiply the ratio by your screen width to find where the projector must sit. Projectors with a zoom lens cover a range of ratios, such as 1.2 to 1.5.
| Throw ratio | Projector type | 100-inch screen (87.2 in wide) | 120-inch screen (104.6 in wide) |
|---|---|---|---|
| 0.5 | Short throw | 3.6 ft (1.11 m) | 4.4 ft (1.33 m) |
| 0.8 | Short throw | 5.8 ft (1.77 m) | 7.0 ft (2.13 m) |
| 1.2 | Standard | 8.7 ft (2.66 m) | 10.5 ft (3.19 m) |
| 1.5 | Standard | 10.9 ft (3.32 m) | 13.1 ft (3.98 m) |
| 2.0 | Long throw | 14.5 ft (4.43 m) | 17.4 ft (5.31 m) |
Ultra-short-throw (UST) projectors sit a few inches to about 1.5 ft from the wall below the screen. Their makers usually quote distance from the back of the unit or from the screen surface rather than from the lens, so use the maker's own size chart for placement. UST projectors also work best with screens designed for them (ceiling-light-rejecting surfaces), since a standard matte white screen reflects room light back at viewers.
- Pick the screen size from your seating distance using the table above.
- Note the screen width (0.872 × diagonal for 16:9).
- Multiply by the projector's throw ratio range to get the mounting distance range. Make sure it falls on a ceiling joist, shelf or table you can actually use.
- Check vertical offset. Most home projectors are designed to sit level with the top (ceiling mount, inverted) or bottom of the screen. Lens shift lets you move the image without tilting; keystone correction does it digitally but softens the picture.
Common sizing mistakes
- Buying by diagonal across formats. A 100-inch 2.35:1 screen is only 39.2 in tall, 20% shorter than a 100-inch 16:9. TV and streaming content will look small on it.
- Forgetting the frame. A 120-inch screen needs about 110 × 64 in of wall once a 2.5 in frame is added.
- Too big for the room's light. A larger screen spreads the same projector light over more area. Going from 100 to 120 in makes the picture 31% dimmer at the same projector output, which matters in rooms that are not fully dark.
- Mounting too high. Screens hung like TVs at eye level, or higher, cause neck strain at these sizes. Keep the bottom edge low.
For sound to match a large picture, the soundbar size guide covers bar widths for big screens. For aspect ratio background, see the aspect ratio guide, and the TV size chart if you are weighing a large TV instead.
Frequently asked questions
How big is a 100-inch projector screen?
In 16:9 format, the picture area is 87.2 in wide and 49.0 in tall (221.4 × 124.5 cm), or about 7.3 × 4.1 ft. With a typical 2.4 in frame, the whole screen is about 92 × 54 in.
How big is a 120-inch projector screen in feet?
A 120-inch 16:9 screen is 8.7 ft wide and 4.9 ft tall (104.6 × 58.8 in, or 266 × 149 cm). Add the frame or housing to that for wall space.
What size projector screen do I need for a 12 ft viewing distance?
Between about 89 and 120 in (16:9). The 120-inch size gives a 40° field of view (THX guidance) from 12 ft; 89 in gives 30° (SMPTE minimum). Most people settle between 100 and 110 in at that distance.
Is a 4:3 or 16:9 projector screen bigger at 100 inches?
A 100-inch 4:3 screen is taller and has more area (80 × 60 in, 4,800 sq in) than a 100-inch 16:9 screen (87.2 × 49 in, 4,273 sq in), but it is narrower. When you play 16:9 video on a 4:3 screen, the picture uses only 80 × 45 in, about the size of a 92-inch 16:9 screen.
How high should a projector screen be mounted?
Put the bottom of the picture roughly 24 to 36 in (60–90 cm) above the floor, so that seated viewers look at the lower third of the image. In a room with a second row, raise it enough to clear heads in the front row.