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Series and parallel capacitors
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Calculators / Technology / Capacitor stored energy
Capacitor stored energy calculator
Calculate capacitor energy and signed charge from capacitance in microfarads and voltage; energy scales with voltage squared while charge is linear.
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Stored energy0.07J
Charge0.01C
Calculator controls
How to calculate
Calculate capacitor energy and signed charge from capacitance in microfarads and voltage; energy scales with voltage squared while charge is linear.
Stored energy = c/1000000*v^2/2 J; Charge = c/1000000*v C
Worked example
Capacitance (µF): 1000; Voltage (V): 12.
Stored energy: 0.07 J; Charge: 0.01 C.
Assumptions and limits
Calculate capacitor energy and signed charge from capacitance in microfarads and voltage; energy scales with voltage squared while charge is linear. Ideal components without parasitic effects or losses. Reactance is a magnitude for sinusoidal AC. The RC cutoff assumes an unloaded first-order low-pass filter.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Calculate capacitor energy and signed charge from capacitance in microfarads and voltage; energy scales with voltage squared while charge is linear.
When this tool is useful
Stored energy = c/1000000*v^2/2 J; Charge = c/1000000*v C
Understanding your inputs
| Input | What to enter |
|---|---|
| Capacitance (µF) | Enter a number of at least 0 and no more than 1000000000000. |
| Voltage (V) | Enter a number of at least -1000000000000 and no more than 1000000000000. |
Frequently asked questions
What assumptions does this calculation use?
Calculate capacitor energy and signed charge from capacitance in microfarads and voltage; energy scales with voltage squared while charge is linear. Ideal components without parasitic effects or losses. Reactance is a magnitude for sinusoidal AC. The RC cutoff assumes an unloaded first-order low-pass filter.
How is the result calculated?
Stored energy = c/1000000*v^2/2 J; Charge = c/1000000*v C