I find this projector calculator very useful. You only need to choose the throw ratio of your projector, and you can calculate the most reasonable projection size and viewing distance. Of course, your actual space is the final factor.
Oh!!Thank you so much,This picture is very simple and clear, this is the viewing distance, but it does not matter, I can adjust the position of the projector to fit the screen
I find this projector calculator very useful. You only need to choose the throw ratio of your projector, and you can calculate the most reasonable projection size and viewing distance. Of course, your actual space is the final factor.