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Grade Curve Calculator
Curve test scores four ways — flat, proportional scale, square root or bell curve with a target mean — and see every student’s new grade.
Grade Curve Calculator
New class averageWas 76.1% · 12 students
| # | Raw | Curved | Change |
|---|---|---|---|
| 1 | 58 | 68 | +10.0 |
| 2 | 64 | 74 | +10.0 |
| 3 | 71 | 81 | +10.0 |
| 4 | 77 | 87 | +10.0 |
| 5 | 80 | 90 | +10.0 |
| 6 | 83 | 93 | +10.0 |
| 7 | 85 | 95 | +10.0 |
| 8 | 88 | 98 | +10.0 |
| 9 | 90 | 100 | +10.0 |
| 10 | 72 | 82 | +10.0 |
| 11 | 66 | 76 | +10.0 |
| 12 | 79 | 89 | +10.0 |
Flat and scale curves keep the ranking and help everyone; the square-root curve lifts low scores most. Tell students which method you use.
Frequently asked questions
Is my data uploaded?
No. The calculation runs entirely in your browser — nothing you type is sent to a server.
Is it free?
Yes — free, unlimited and no sign-up.