# Grade Curve Calculator

The Grade Curve Calculator allows you to calculate the approximate grading scale for a standard grade curve, helping in professional assessment.

Enter the total test population, the highest score, and the lowest score to calculate the grade curve.

A Normal Bell Curve calculates grades based on student results, using standard deviations from the mean average.

Please note that a small test population with minimal score variation won’t produce an effective Bell Curve.

In a true Bell Curve grading method, a test population of 100 students is divided into 5 categories: 2 students get an “A”, 14 get a “B”, 68 get a “C”, 14 get a “D”, and 2 get an “F”.

You might be interested in calculating the percentile rank, finding the class width, or determining the class rank.

**References**

- Calsamiglia, C., & Loviglio, A. (2019). Grading on a curve: When having good peers is not good. Economics of Education Review, 73, 101916. https://doi.org/10.1016/j.econedurev.2019.101916
- Grade Statistics, or All About the Curve. (n.d.). Grade Statistics, or All About the Curve. https://www.astronomy.ohio-state.edu/pogge.1/Ast162/Quizzes/curve.html
- How Does Grading on a Curve Work? | BestColleges. (n.d.). BestColleges.com. https://www.bestcolleges.com/blog/curved-grading/