When to use this calculator
Series capacitance is lower than either individual positive capacitor, unlike series resistance.
Explore the dc circuits & components calculators for other questions in this topic. For a related calculation, use the Series Inductance Calculator: Add two uncoupled inductors connected in series.
PUTTING IT INTO PRACTICE
Series Capacitance: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| First capacitance (μF) | 10 |
| Second capacitance (μF) | 10 |
| Result | 5 μF |
- Check the input labels and enter the example values above.
- Apply the relationship: Equivalent capacitance = C₁C₂/(C₁+C₂).
- The result is 5 μF, rounded for display.
How to interpret your result
Applies to ideal components without leakage or parasitic effects.
Ideal component models omit tolerances, heat and parasitic effects. Distinguish nominal energy from usable energy for batteries. Component ratings and installation requirements need separate manufacturer and design checks.
Frequently asked questions
Can these calculations select a safe installation rating?
No. They explain ideal relationships and do not include every thermal, protective or regulatory requirement.
When is the series capacitance calculator useful?
Series capacitance is lower than either individual positive capacitor, unlike series resistance.
How do I use the series capacitance calculator?
Enter first capacitance (μf), second capacitance (μf). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Equivalent capacitance = C₁C₂/(C₁+C₂).
What should I check before using the result?
Applies to ideal components without leakage or parasitic effects.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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