# How to calculate electrical impedance

To calculate the impedance of a capacitor, the formula to do so is:

$Z_C=\dfrac{1}{2\pi fC}$

where $$Z_C$$ is the impedance in unit ohms, $$f$$ is the frequency of the signal passing through the capacitor, and $$C$$ is the capacitance of the capacitor. To calculate the impedance of an inductor, the formula to do so is:

$Z_L=2\pi fL$

where $$Z_L$$ is the impedance in unit ohms, $$f$$ is the frequency of the signal passing through the inductor, and $$L$$ is the inductance of the inductor. If there are both capacitors and inductors present in a circuit, the total amount of impedance can be calculated by adding all of the individual impedances:

$Z_{tot}=Z_C+Z_L$