How many meetings have you attended where you can't read what's on the screen? It's a bad experience. It's frustrating. It makes us all look bad. But not anymore. The science has caught up to the real-life scenarios.
Display Image Size for 2D Content in Audiovisual Systems (DISCAS) is scalable and adaptable. And now, you can leave the math to the calculator.
What kind of viewing will be taking place? Choose how you want to calculate.