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Apply grading curves to a set of scores and see the effect
A grading curve adjusts raw exam or assignment scores to better reflect relative performance, compensate for difficult exams, or target a specific class average.
71.5%
Original Avg
80.0%
Curved Avg
+8.5
Avg Boost
| # | Original | Curved | Grade |
|---|---|---|---|
| 1 | 65.0 | 73.5 | C |
| 2 | 72.0 | 80.5 | B |
| 3 | 78.0 | 86.5 | B |
| 4 | 55.0 | 63.5 | D |
| 5 | 88.0 | 96.5 | A |
| 6 | 42.0 | 50.5 | F |
| 7 | 91.0 | 99.5 | A |
| 8 | 67.0 | 75.5 | C |
| 9 | 74.0 | 82.5 | B |
| 10 | 83.0 | 91.5 | A |
Formula
Add Points: Curved = Score + (Target − ClassAvg) | Scale: Curved = Score × (100 / Highest) | √ Curve: Curved = √Score × 10Target = the desired class average after curving
ClassAvg = the original mean score before curving
Highest = the highest raw score in the class
Worked Example
Class avg 71.5%, target 80%
Did you know? The bell curve grading model was popularized at Harvard in the early 1900s. Some law schools still mandate that only 10% of students can receive an A, creating intense competition among classmates.
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