Grade Curve Calculator
Curve a raw score with points, percentage points, or class-high scaling.
Curve Inputs
Enter the raw score and choose how the curve should be applied.
Raw points before the curve.
Maximum points possible before the curve.
Match the way your class applies the curve.
Points, percentage points, or class high score.
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Curve Policy
Some classes allow curved scores above 100%; others cap them.
Your Curved Grade
Curved percentage, letter grade, and score lift.
Curve Breakdown
How The Grade Curve Calculator Works
A curve adjusts the raw percentage before assigning a letter-grade estimate.
Start with raw percent
The raw grade is score earned divided by total points, multiplied by 100.
Apply curve method
The curve can add points, add percentage points, or scale all scores relative to the class high score.
Cap and grade
If the cap is enabled, scores above 100% are limited before mapping the curved percentage to a common letter-grade scale.
Grade Curve Calculator FAQ
Common questions about test curves, class-high scaling, and caps.
How does a grade curve calculator work?
It starts with the raw score percentage, applies the selected curve method, then converts the curved score back into points and a letter-grade estimate.
What does scaling the class high to 100% mean?
If the highest score was below the maximum, every score is scaled by the same ratio so that the class high becomes a perfect score.
Should curved grades be capped at 100%?
Many classes cap curved grades at the maximum score, but some allow scores above 100% for extra credit. Use the policy from your teacher or syllabus.