Capacitance Calculator

A capacitor stores electrical energy in an electric field between two conductive plates separated by an insulating dielectric. Capacitance C (farads) measures how much charge Q is stored per unit voltage V: C = Q/V

The calculator uses the standard published formula for capacitor stores electrical energy in an electric field between two conductive plates separated by an insulating dielectric. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Q = CV (charge = capacitance × voltage). Each step in the calculation is shown so you can verify the result manually.