Square Root Curve Calculator
Convert a raw grade to a square-root curved grade — √score × 10.
Enter your values
ⓘ Live results
Results
- Curved score
- 80 %
- Points gained
- 16
Working
- 1√64 = 8
- 2× 10 = 80
| Raw score | Curved score |
|---|---|
| 30 | 54.8 |
| 40 | 63.2 |
| 50 | 70.7 |
| 60 | 77.5 |
| 70 | 83.7 |
| 80 | 89.4 |
| 90 | 94.9 |
| 100 | 100 |
Quick answer
A square-root curve replaces a raw percentage with the square root of that percentage times 10. A 64 becomes 80 and a 36 becomes 60; a perfect 100 is unchanged.
curved = √raw × 10
How to use the Square Root Curve Calculator
- 1Enter the raw percentage.
- 2Read the curved score.
- 3Use the table to see the curve across the whole range.
Worked example
Using the values the calculator loads with:
Inputs
- Raw score64 %
Results
- Curved score80 %
- Points gained16
- √64 = 8
- × 10 = 80
Frequently asked questions
How does a square root curve work?
The curve is √raw × 10, so it lifts low scores substantially, lifts middling scores modestly and leaves a 100 untouched.
What does a 50 become on a square root curve?
√50 × 10 ≈ 70.7, so a 50 becomes about a 71.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.