Two important elements are the coil and the capacitor, particularly if they appear together as resonant circuit. On this webpage you can calculate frequency, inductivity and capacity of a tank circuit mutually. By the way also the impedances of the circuits will be calculated. That are equal to the inductive reactances of the coils and to the capacitive reactances of the capacitors.

If you want to know, how looks the equations used into the script, then see at the mathematical background: Thomson formula, impedance.