Science, Tech, Math › Math Z-Score Formula Share Flipboard Email Print Math Statistics Formulas Statistics Tutorials Probability & Games Descriptive Statistics Inferential Statistics Applications Of Statistics Math Tutorials Geometry Arithmetic Pre Algebra & Algebra Exponential Decay Functions Worksheets By Grade Resources View More By Courtney Taylor Professor of Mathematics Ph.D., Mathematics, Purdue University M.S., Mathematics, Purdue University B.A., Mathematics, Physics, and Chemistry, Anderson University Courtney K. Taylor, Ph.D., is a professor of mathematics at Anderson University and the author of "An Introduction to Abstract Algebra." our editorial process Courtney Taylor Updated January 06, 2020 To convert any bell curve into a standard bell curve, we use the above formula. Let x be any number on our bell curve with mean, denoted by mu, and standard deviation denoted by sigma. The formula produces a z-score on the standard bell curve.