Square Root Curve Calculator

The square root curve calculator helps you convert the percentage of students’ grades into square root curve grades.

Enter the student’s percentage grade and click the calculate button to calculate the square root curve.

If’re not familiar, the square root grading curve is a technique that adjusts the grades of a whole class to align them more closely with expectations. It serves to address challenging tests or to establish a standard for difficult courses.

The formula of the square root curve grade is:


  • SRG= Square root curve grade
  • G= Student’s percentage
Square Root Curve formula and Calculator

You might be interested in finding the 5-number summary or figuring out what the grade curve is.


  • How to Grade Using a Square Root Curve. (2018, April 24). Sciencing. https://sciencing.com/grade-using-square-root-curve-8541101.html
  • What Is Grading on a Curve? (2019, July 22). ThoughtCo. https://www.thoughtco.com/grading-on-a-curve-3212063
  • Staff, T. H. (2021, November 8). The Ultimate Guide to Grading on A Curve | Top Hat. Top Hat. https://tophat.com/blog/grading-on-a-curve/
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