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Square Root Curve Calculator
Apply a square-root grade curve (new score = 10 × √raw) to a whole class at once. Lifts lower scores most while keeping the order.
Square Root Curve Calculator
New class averageWas 76.1% · 12 students
| # | Raw | Curved | Change |
|---|---|---|---|
| 1 | 58 | 76.2 | +18.2 |
| 2 | 64 | 80 | +16.0 |
| 3 | 71 | 84.3 | +13.3 |
| 4 | 77 | 87.7 | +10.7 |
| 5 | 80 | 89.4 | +9.4 |
| 6 | 83 | 91.1 | +8.1 |
| 7 | 85 | 92.2 | +7.2 |
| 8 | 88 | 93.8 | +5.8 |
| 9 | 90 | 94.9 | +4.9 |
| 10 | 72 | 84.9 | +12.9 |
| 11 | 66 | 81.2 | +15.2 |
| 12 | 79 | 88.9 | +9.9 |
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.