RMS Calculator

This calculator works out the root mean square in both of the senses it is used. Give it a list of numbers and it returns the quadratic mean along with the sum of squares, the arithmetic mean and the population standard deviation, and prints the identity that ties them together. Give it a waveform instead and it converts between RMS, peak, peak-to-peak and rectified average for a sine, square, triangle, sawtooth or rectified sine, with the form and crest factors and the power into a resistance you name. The waveform ratios are the exact integrals for a clean signal, so a clipped or distorted wave needs a true-RMS meter rather than this page.