How does a square root curve work?

Square root curve: √(Original × 100). This helps lower scores more than higher ones. Example: 64% becomes √(64 × 100) = √6400 = 80%. A 49% becomes √4900 = 70%. It's generous to struggling students.

What is a flat curve?

A flat curve adds the same points to everyone. If the highest score was 85/100, add 15 points to all students. Fair but doesn't change the relative distribution. Student with 70 becomes 85, student with 40 becomes 55.

How do I calculate the curve amount needed?

Determine your target average (e.g., 75%) and actual average (e.g., 65%). For flat curve: add the difference (10 points). For scaling: multiply all grades by (Target / Actual) = 75/65 = 1.154.

Is curving grades fair?

It depends on perspective. Pros: compensates for unexpectedly difficult tests, maintains consistent standards. Cons: can reward poor performance, may demotivate high achievers. Most fair when the test difficulty was misjudged.

Grading Curve Calculator

Apply grading curves including flat scaling, square root curve, and bell curve. Adjust class grades to desired average.

Calculate

Original Grade (%)

Curve Type (square-root or flat)

Formula

Curved Grade = √(Original Grade × 100) or other curve formulas

Example

original Grade:64

curve Type:square-root

curved Grade:80

improvement:16

Frequently Asked Questions

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