Use this free grade curve calculator to find your curved grade. Choose your curve type — flat points added, scaled to 100, or square root curve — and see your new grade instantly.
Calculate My Curved Grade
Types of Grade Curves
Flat curve: Professor adds a set number of points to every score.
Scale to 100: The highest score becomes 100, everyone else scales up proportionally.
Square root curve: Take the square root of your score and multiply by 10.
Frequently Asked Questions
What is a grade curve?
A grade curve is when a professor adjusts everyone's score upward to account for a difficult exam. The most common types are adding flat points, scaling the highest grade to 100, or using a square root formula.
How does scaling to 100 work?
If the highest score in the class was 85%, that becomes 100%. Your score is then scaled by the same ratio. So if you scored 70%, your curved grade would be (70 ÷ 85) × 100 = 82.4%.
What is the square root curve?
Your score's square root is multiplied by 10. For example, a 64% becomes √64 × 10 = 80%. It helps low scores more than high scores.
Does a curve always help you?
Yes — all common curve types are designed to raise grades, never lower them. A flat curve adds the same points to everyone equally.