What screen aspect ratio means
Choose the screen shape from the source content, image width, room geometry and the people who need to see it.
A room-first explanation of width-to-height ratios and how presentation, video, mixed content and screen selection influence the practical choice.
Aspect ratio is the relationship between an image's width and height. It changes the shape of the visible screen, the size of the image at a given diagonal and how content fits when the source and screen use different formats.
Common room formats
| Ratio | Shape | Often considered for |
|---|---|---|
| 1:1 | Square | Rooms with mixed presentation material or a brief that needs a squarer image. |
| 4:3 | Near-square | Legacy presentation content or existing room systems that already use this shape. |
| 16:9 | Widescreen | Video, home cinema, games and many current presentation sources. |
| 16:10 | Slightly taller widescreen | Computer and office content that is authored for a 16:10 display. |
| 21:9 | Ultra-wide | A specific cinematic or panoramic brief where the source and room support it. |
Why the ratio matters
When the source and screen shapes do not match, the image may show unused bars, be cropped or be stretched depending on the source and display settings. That should be an intentional choice based on the content and the people viewing it.
Choose from content and the room
- List the source devices and content formats used most often.
- Check whether mixed content should show bars, use masking or remain uncropped.
- Decide whether documents need a squarer image or video needs a wider image.
- Measure the visible width and height that fit the wall, furniture and sightlines.
- Confirm the projector and source support the selected output without an avoidable scaling mismatch.
- Check the chosen ratio with the screen's outer casing or frame and the intended throw geometry.
Choose an image shape
List the laptops, media players, source formats and viewing positions the room uses.
Choose an image shape