MihsabaHow to use
Capacitor energy follows E=½CV². Solve energy, capacitance or voltage, and also get charge Q=CV.
- Choose what to solve.
- Enter the two known values and capacitance unit.
- Calculate E, C, V and Q.
How it is calculated
E=½CV²; Q=CV; C=2E/V²; V=√(2E/C)
Example
Example: 1000 µF at 12 V stores 0.072 J and 0.012 C.
Important notes
The calculation is ideal; real capacitors have ESR, leakage, tolerance and voltage ratings.
Frequently asked questions
Why is voltage squared?
Because stored energy scales with V².
Energy versus charge?
Energy is in joules; charge is in coulombs.
Are µF and nF supported?
Yes.