Square Root Curve Calculator
Apply a square root curve to your test score. This curve benefits lower scores more than higher scores, using the formula √(score/max) x max.
How does the square root curve work?
The square root curve applies the formula: Curved Score = √(Original/Max) x Max. This method benefits lower scores more than higher scores, helping struggling students while still rewarding high performers.
Why do teachers use the square root curve?
Teachers use it when an exam was particularly difficult or when they want to help students who struggled while still differentiating between performance levels. It's more generous to lower scores than a flat point addition.
What scores benefit most from the square root curve?
Lower scores see the biggest improvements. For example: 36% -> 60%, 49% -> 70%, 64% -> 80%, 81% → 90%. The curve helps failing grades become passing while high scores are only slightly boosted.
Can a square root curve lower my score?
No. The square root curve always increases scores (except for 0% and 100% which stay the same). Every score between 0 and max will be higher after the curve is applied.