# How to Calculate the Current Through a Capacitor

To calculate current going through a capacitor, the formula is:

All you have to know to calculate the current is **C**, the capacitance of the capacitor
which is in unit, Farads, and
the derivative of the voltage across the capacitor. The product of the two yields the current going through the capacitor.

**Example**

If the voltage of a capacitor is 3sin(1000t) volts and its capacitance is 20μF, then what is the
current going through the capacitor?

To calculate the current through a capacitor with our online calculator, see our
Capacitor Current Calculator.

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