Grade Curve Calculator

Compare points-added, square-root, top-score scaling, or factor-based curves without assuming one school-wide grading policy.

Raw score %

Curve method

Points to add

Curved score

70%

+5 percentage points

65 + 5 = 70

A curve is an instructor-defined grading policy. This tool applies the chosen mathematical transformation only; it does not determine whether a curve is appropriate.

Compare mathematical curve methods

Additive, square-root, top-score scaling, and multiplier methods can produce very different results from the same raw score. The calculator shows the arithmetic, not a recommendation for grading policy.

Scores above 100%

The raw mathematical result is not automatically capped because some courses allow extra credit while others cap grades at 100. Apply your own course rule.