Projector planning
120 Inch Projector Screen Size and Throw Distance
A 120 inch screen is common for home theater rooms, but the real width and throw distance determine whether it fits.
Quick answer
A 120 inch 16:9 projector screen has an image area about 104.59 inches wide and 58.83 inches tall, or about 2.66 x 1.49 m.
Screen size calculation
A 120 inch diagonal with a 16:9 ratio gives a width of 104.59 inches and a height of 58.83 inches. These are image-area dimensions.
If your screen has a black border or case, the installed product will be larger than this image area.
Throw distance planning
Multiply the image width by the throw ratio. At 1.2, the lens distance is about 125.51 inches. At 1.5, it is about 156.88 inches.
Short-throw and ultra-short-throw projectors use very different geometry, so always check the exact projector model after this estimate.
120 inch 16:9 projector reference
| Item | Value |
|---|---|
| Image width | 104.59 in / 2.66 m |
| Image height | 58.83 in / 1.49 m |
| Throw distance at 1.2 | 125.51 in / 3.19 m |
| Throw distance at 1.5 | 156.88 in / 3.98 m |
Frequently asked questions
How wide is a 120 inch projector screen?
The 16:9 image area is about 104.59 inches wide.
How far back should the projector be?
At 1.5 throw ratio, about 13.07 ft. At 1.2 throw ratio, about 10.46 ft.
Is 120 inches too large?
It depends on seating distance, room width and projector brightness. Check both screen size and viewing distance.