Doubts to make an helicopter

Hello, I'm doing a helicopter for two persons with a friend, but I do not know how to calculate through the power of the engine, the performance of the propellers depending on his radius.

In short, what I want are the two formulas that relate these two variables that I need to make a table testing with different engines and different measures of the propellers (apart also if it is possible to also take into account the number of propellers).

I do not know if I explained well...

Helicopters don't typically have "propellers." They have rotors and they are more involved than just providing vertical thrust. I think you need some basic research before you start commiting to a design. There are a number of helicopter theory books out there. You might find this book a useful start: https://www.amazon.com/Ultralight-He...a-569221934145