THANK YOU, @Bubblobill!

That's perfect! Even better since it's resizeable - I can now finally decide what size screen my room will actually need after we finish the remodel. This will go a long way to convincing my wife.

For posterity, here's a good home theater calculator that allows you to calculate optimal screen sizes depending on room sizes, viewing distance, and specific projector model zoom levels.

https://www.projectorscreen.com/project ... alculators

I hope this helps others who are designing their home theater/fun rooms.