Root mean square is also referred as quadratic mean and it is abbreviated as RMS. It is defined as the arithmetic mean of the squares of a set of numbers. RMS refers to the varying sinusoidal voltages when the wavelength magnitude changes with time. RMS value is defined as V_{RMS} or I_{RMS}. Find the peak value of the RMS sine wave by entering the voltage RMS value in the RMS sine wave peak value calculator