Thanks Ethan, i really appreciate your work, and thanks for your addition to this thread. I thought it would be a good thing to have a thread with just calculators.
Your ModeCalc does more, but it is also different.
I have changed the colours in the file to make it clearer.
If anyone has got an RFZ design calculator, i am very interested:
I want to build an RFZ control room but i don't have a design.