Capacitor Energy Table: Stored energy by Capacitance
Reference table of stored energy for Capacitor Energy across a range of capacitance values — exact, engine-computed figures you can read off at a glance.
Capacitor Energy Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Stored energy
0.072000
- Charge stored
- 0.012000
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Capacitor Energy Calculator
The Capacitor Energy Calculator works out your stored energy, along with 1 related figure in an instant. Enter capacitance and voltage and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the capacitance.
- Enter the voltage.
- Read off your stored energy, together with charge stored — the calculator updates automatically, with no button to press.
Formula
The Capacitor Energy Calculator uses the formula:
Stored energy = 0.5 × (Capacitance ÷ 1000000) × Voltage ^ 2
Worked example
For example, with capacitance of 1,000 µF and voltage of 12 V, the stored energy is 0.072000.
| Capacitance | 1,000 µF |
|---|---|
| Voltage | 12 V |
| Stored energy | 0.072000 |
|---|---|
| Charge stored | 0.012000 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Energy equals half the capacitance times voltage squared: E = ½CV². A 1000 µF capacitor at 12 V stores about 0.072 joules.
The formula uses farads, so microfarads are divided by one million. 1000 µF is 0.001 F.
Charge is capacitance times voltage, Q = CV, measured in coulombs. It is the amount of electric charge held on the plates.
Yes. Because voltage is squared, doubling it quadruples the stored energy, while doubling capacitance only doubles it.
The Capacitor Energy Calculator uses the formula: Stored energy = 0.5 × (Capacitance ÷ 1000000) × Voltage ^ 2. For example, with capacitance of 1,000 µF and voltage of 12 V, the stored energy is 0.072000.
Enter the capacitance. Enter the voltage. Read off your stored energy, together with charge stored — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Capacitor Energy: Formula, Steps & Examples
Learn how to calculate Capacitor Energy — the formula explained step by step, with worked examples and a free calculator to check your answer.