View the Epson Projection Distance Calculators and Display Size Calculator for optimal projection setup.

May 13, 2015 · According to this equation, if you set your projector thirteen feet back from the screen, your picture will be perfectly illuminated and will easily fit the proportions of the screen with some minor adjustments to the lens' zoom. Why It's Important When it comes to good projection, positioning is everything. Oct 26, 2019 · Even when the equation is as simple as the one above. With that said, let’s run through several examples of how to calculate throw ratio, distance and screen size based on the equations provided above. Keep in mind, that projector screen sizes are typically measured diagonally. Yes, I know, this can make things slightly more confusing.