Estimate screen width, height, and diagonal from throw distance and throw ratio for home theater planning.
Enter the measured lens-to-screen throw distance in feet.
Enter your projector throw ratio from the manufacturer.
Pick aspect ratio, then calculate to estimate width, height, and diagonal.
Disclaimer: Real-world image size can vary with zoom setting, lens shift, and projector model tolerances.
For a cinematic setup, verify brightness (lumens) and ambient light, not just image size.