Capacitors in Parallel Calculator

Add capacitance across shared nodes

Parallel capacitors share the same voltage and contribute charge independently, so their capacitances add directly. This calculator reads values separated by commas, spaces, or line breaks and reports the sum in the same unit used for every entry. It is useful when estimating decoupling banks, tuning a target value, or checking a schematic without confusing capacitor and resistor network rules.

The default 10 and 20 microfarad entries produce 30 microfarads equivalent capacitance. A correct parallel total is always at least as large as the largest positive component. Adding another 10 microfarads would raise the result to 40, while removing a branch subtracts that branch's value without changing the others in the ideal lumped model.

Preserve one unit and check circuit realities

Real parallel networks also have equivalent series resistance, inductance, leakage, tolerance, temperature behavior, and voltage bias. Mixing capacitor technologies can improve frequency response but makes a single capacitance number incomplete. The values are summed in your browser and are never uploaded. Convert all entries to one common unit before use, and inspect impedance over frequency for demanding power or RF designs.