Capacitor Series / Parallel Calculator
Combine capacitor values in series or parallel and solve for a missing capacitor. Enter a list of capacitor values (e.g. 10nF, 100nF, 1µF) to get the total; or give one known capacitor and a target total to find the second capacitor needed. Series totals are smaller than the smallest member; parallel totals are the sum. Pairs with the Resistor Series / Parallel Calculator. Everything runs locally in your browser.
Parallel: C = C₁ + C₂ + … (totals grow). Series: 1/C = 1/C₁ + 1/C₂ + …, so the total is always smaller than the smallest member. To hit a target total from one known capacitor: in parallel add C₂ = C_target − C₁; in series add C₂ = 1 / (1/C_target − 1/C₁) (requires the known capacitor to be larger than the target). Units understood: pF, nF, µF/uF, mF, F. Everything runs locally — nothing leaves your browser.