Capacitance to Charge Calculator
Convert capacitance and voltage to stored charge Q = C × V. Default 100 µF at 12 V gives 0.0012 C (1200 µC). Informational only.
Rated 4.7 out of 5 based on 364 reviews
How to find charge from capacitance
- Enter capacitance and choose F through pF.
- Enter the voltage across the capacitor.
- Read charge in coulombs and microcoulombs.
- Energy storage E = ½ C V² is a different job. Nothing is uploaded.
Capacitor charge
Q = C × V
| Charge | Coulombs stored at the typed voltage |
|---|---|
| Capacitance | Farads after unit conversion |
| Voltage | Potential difference across the plates |
| Default | 100 µF × 12 V = 0.0012 C |
| Energy | Not computed here; needs ½ C V² |
| Approval | Informational. Not a discharge safety plan. |
Q equals C times V
Charge in coulombs is capacitance times voltage. 100 µF is 100×10⁻⁶ F. At 12 V, Q = 0.0012 C or 1200 µC.
Capacitance units
Pick µF for catalog parts or pF for small ceramics. The engine converts everything to farads before multiplying by volts.
Finding C first
Parallel-plate geometry C = ε0 εr A / d is on the parallel plate capacitance page if you are building a value from dimensions.
RC timing
After a step, charge moves on a time scale τ = R × C. See RC time constant.
Limits
Ideal capacitor, no leakage.
The formula runs in this tab. CZNull does not receive the numbers.
Informational only. Not wiring, code, or manufacturer approval. See the disclaimer.