About

This tool uses the relationship between a capacitor's energy, voltage, and capacitance to provide any of the following results:

1. Energy stored in the capacitor, given its capacitance and voltage that is charged to.
2. Capacitance, given energy stored in the capacitor and voltage it is charged to.
3. Voltage across the capacitor, given the capacitance, and the energy stored in the capacitor.

This calculator utilizes the following equation to solve for each parameter:

$$E=\frac{1}{2}CV^2$$

where: $E$ is energy stored in a capacitor, $C$ is capacitance, and $V$ is voltage across the capacitor.

Instructions

To get started, fill in any two fields. The parameter in the remaining field will be calculated and appear automatically. The units of each input can be selected on the right of each field - e.g. m (milli), u (micro), or k (kilo).

For example, to calculate the energy stored in a capacitor, enter the capacitor's capacitance in the capacitance field and the voltage across the capacitor in the voltage field, and select the desired units for each. The resulting energy will be computed and displayed in the energy field.

Similarly, to solve for voltage, fill in the energy and capacitance fields.