IMAX has a few different ratios used now to accommodate for different types of rooms, but there are two major ones: 1.9:1 and 1.4:1. More importantly, though, part of IMAX's proprietary system is their own aspect ratio. IMAX movies and theaters are a complete ecosystem that encompasses everything from cameras, speakers, room shapes, screen finishes, and even film types. We've listed the most common aspect ratios in this table, but every TV sold today uses 16:9. To fit modern TVs, vertical black bars or 'pillarboxing' is used. TV shows used to be made using a 4:3 aspect ratio, which is a lot more square than current TVs (this is why 16:9 is often called a widescreen aspect ratio). These horizontal bars are called 'letterboxes.' 21:9 is much wider, so parts of the screen need to be filled with black bars above and below the image in order to fit most TVs. All TVs sold today have an aspect ratio of 16:9, which means that if the width is divided into 16 equal parts, the height of the TV or picture should be 9 parts.ġ6:9 works great for TVs, since that is the aspect ratio used by the majority of today's TV shows, but unfortunately, most movies are made using the cinema standard, which is 21:9.

It defines its overall shape, and it is usually presented as W:H (where W is the width, and H is the height). The aspect ratio is the ratio between the width and the height of a display.

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