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There are many calculations and equations associated with capacitors. The capacitor reactance equations and calculations are common, but there are many more capacitor calculations that may need to be performed.

Capacitor equations and capacitor calculations include many aspects of capacitor operation including the capacitor charge, capacitor voltage capacitor reactance calculations and many more.

## Basic capacitance formulae

The very basic capacitor equations link the capacitance with the charge held on the capacitor, and the voltage across the plates.

where

C is the capacitance in Farads

Q is the charge held on the plates in coulombs

V is the potential difference across the plates in volts

This equation can then be developed to calculate the work required for charging a capacitor, and hence the energy stored in it.

$W={\int}_{0}^{Q}VdQ$

$W={\int}_{0}^{Q}\frac{q}{C}dQ$

$W=\frac{1}{2}C{V}^{2}$