Screen-to-body ratio percentage calculator

I need a calculator for knowing how much Screen-to-body ratio percentage a smartphone had, don't count the notch on the screen, treat all the screen as square, i am sure many people would find that calculator useful, i only found one website that have such online calculator but it's shutdown.

This is a request for a calculator left by a user.

There is still no calculator created for this request. If you are interested in implementing such a calculator, please leave a comment.
Creative Commons Attribution/Share-Alike License 3.0 (Unported) PLANETCALC, Screen-to-body ratio percentage calculator