It is an online projector calculator provided by Projector1 for free. The tool is designed for calculating throw distance, projection size and the best viewing distance of your projector.

How Far Should a Projector Be From the Screen? Since every projector is different, and every projector user tends to have a different screen size, the precise distance for your setup will likely ...

You've chosen a home projector -- now you need to set it up! We'll go over what to tackle first and how to get a perfect image when the projector is in place.