Curve Grading Calculator
Applies the common grading curves to one score so you can compare them.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
top score: score + (100 − highest) square root: 10 × √score average shift: score + (target − average) bell curve: target + target SD × (score − average) ÷ SD
All work on percentage scores. Convert raw points first.
What to watch out for
The teacher’s method decides your real grade. A curve is not a standard procedure and the same score can land differently under each.
Frequently Asked Questions
How does the square root curve work?
Take the square root of the percentage and multiply by 10. A 72 becomes 84.9. Lower scores generally gain more, and 100 stays at 100.
How does curving to the top score work?
Everyone gains the gap between the top score and 100. With a top score of 92, a 72 becomes 80.