If you're not sure which aspect ratio is best for your type of use, then you should keep reading. It entirely depends on your desired use of the projector. For most people, 16:9 is the best and most practical choice. This is because it's the most popular format for movies, series, YouTube videos, live sports and even for gaming.
If you're looking for a beamer that you're going to use for business presentations, then 16:10 is the best choice. It gives you a little more vertical space to present your slides, spreadsheets or your graphs on, for example. Buying a beamer with this aspect ratio is also a little more expensive. But that's because these types of beamers also have a high ANSI Lumen count to have the best brightness and quality even in rooms where there is light.
A 4:3 aspect ratio is less common for most modern beamers nowadays. This is because this format is used for older content or even older presentation formats. Some beamers just support it while also having a 16:9 aspect ratio, which could be useful if you want to use both aspect ratios. Having 4:3 as the only aspect ratio of your beamer for movies or online videos, for example, is not the best choice.
For a Beamer with a 21:9 aspect ratio, it will only be interesting if you have a dedicated big cinema room with a suitable projection screen. 21:9 is wider than the normal 16:9 aspect ratio of movies. If you've been to a cinema, most screens are closer to having an aspect ratio of 21:9 than 16:9. However, most monitors, TVs, laptops, streaming content and mini beamers are still based on 16:9. If you want a 21:9 aspect ratio beamer, it will cost quite a lot more than the most popular choice of 16:9.
For most people who want to find the right aspect ratio for a beamer, we recommend choosing the standard 16:9 aspect ratio. This format matches most modern screens and content and even matches the screen of your laptop. This is also the most popular aspect ratio of modern mini beamers, making it the more affordable choice without compromising on quality.
With a 16:9 beamer you're able to enjoy a large-screen projection experience without worrying about your content being suited for this aspect ratio or not. If you just want to watch a movie or your favourite series or play games, then 16:9 will give you the results you desire.
