The familiar term voltage is the common name for potential difference. SI unit of Potential energy is Joule (J). Units of potential difference are joules per coulomb, volt (V) is given after Alessandro Volta. Potential energy (PE) = Mass(M) X Gravitational acceleration (g) X Altitude (h). When the individual values are put in the above equation we get, Dimensional Formula of Potential energy= M1L2T-2.