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Capacitor Charge and Energy Calculator — result sheet
Calculate stored charge and electrostatic energy from capacitance and voltage for an ideal capacitor.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Charge Q = CV and stored energy U = ½CV², after converting capacitance from microfarads to farads.
This ideal single-capacitor model shows both charge and energy. It is useful for study and first-pass sizing arithmetic, but it does not choose a component, account for leakage, or approve a high-energy circuit.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Capacitance — µF; minimum 1.0E-6; maximum 1000000000
- Voltage across capacitor — V; minimum 0; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Capacitance | 100 |
| Voltage across capacitor | 12 |
Charge = 1,200 µC; stored energy = 0.0072 J.
Assumptions and limits
- Capacitance is entered in microfarads and converted to farads before calculation.
- Voltage is the magnitude across one capacitor and is entered in volts.
- The capacitor is treated as ideal with a linear capacitance.
- Charge is reported as a magnitude; plate polarity is not modeled.
- Energy is stored electrostatic energy and is reported in joules.
- Equivalent series resistance, leakage, dielectric loss, tolerance, and voltage derating are not modeled.
- The page does not calculate discharge current, time, or safe handling procedure.
- A real component must be selected with a voltage rating and operating conditions above the scenario.
- High-voltage or high-energy capacitors can remain hazardous after a source is removed; follow qualified safety procedures.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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