Series and Parallel Capacitor Calculator
Enter your capacitor values, pick the unit and connection, and get the total capacitance.
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How to use this calculator
- Type the capacitor values, separated by commas, spaces or new lines.
- Choose the unit (pF/nF/µF/F) and series or parallel.
- Click Calculate for the total capacitance.
Capacitor formulas (the opposite of resistors)
Capacitors in parallel add up:
Ctotal = C₁ + C₂ + C₃ + …
Capacitors in series combine as reciprocals:
1 / Ctotal = 1/C₁ + 1/C₂ + 1/C₃ + …
So the series total is smaller than the smallest capacitor, while the parallel total is the simple sum — exactly the reverse of resistors.
Frequently asked questions
- How do capacitors combine in parallel?
- They add up: Ctotal = C₁ + C₂ + … — the opposite of resistors.
- What is the total of two 10 µF capacitors in series?
- 5 µF — in series the total is less than the smallest capacitor.
- Why are capacitors the opposite of resistors?
- Capacitance adds in parallel and combines as reciprocals in series, the reverse of how resistance behaves.
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