# Impedance

- Acoustic Impedance - This formula calculates the acoustic impedance of a medium based on its density and the velocity of sound in the medium.
- Impedance in an AC Circuit - Calculate the impedance in an AC circuit by taking into account the resistance and reactance.
- Impedance in AC Circuits - Calculate the impedance in an AC circuit with this handy calculator. Simply input the values of resistance and reactance, and get the impedance instantly.