This 1RM calculator was designed to give a quick, reliable one rep max estimate using several published rep max equations. The calculator will give actual (A) formula results (rounded to two decimal places) and it will also give results that have been rounded (R) to the nearest 5 pound increment making the ouput more practical when using standard olympic weights.
Notice: The formulas used here are, to the best of my knowledge, free from mathematical error. However, this doesn't mean that they produce accurate results. The numbers provided by this calculator should be viewed as estimates only. There are several factors that influence a true one rep max and no one formula can accomodate all possible variables.