Test Curve Calculator
Apply a grading curve to a set of test scores (bell to the top score, a flat point bump, a square-root curve, or a linear scale) and see the curved results and new average. Runs in your browser.
Class average
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The curve methods
Top → max adds the gap between the highest score and the maximum to everyone. Add points gives a flat bump. Square-root uses √(raw × max), which helps low scores most. Linear scale stretches every score so the top becomes the maximum.
Curved scores are capped at the maximum. Choose the method that matches your grading policy. Everything is computed in your browser, no scores are uploaded.
What this does
A test curve calculator applies a grading curve to a set of test scores — bell to the top score, a flat point bump, a square-root curve, or a linear scale — and shows the curved results and new average.
How to use it
- Paste the raw scores.
- Pick a curve method.
- Set the maximum score.
- Read the curved scores and average.
How it works
Top-to-max adds the gap to everyone; add-points gives a flat bump; the square-root curve helps low scores most. Curved scores are capped at the maximum.
square-root curve: curved = √(raw × max)
Understanding your result
Each method reshapes the scores differently, so pick the one that matches your intent: top-to-max lifts everyone evenly, a flat bump is simplest, and the square-root curve helps the lowest scores most while barely moving the top. Curved scores are capped at the maximum, and watch the new average to confirm the curve is generous or strict by the amount you intended.
Example
A 64 on a 100-point square-root curve rises to 80.
Sources & methodology
Last updated .
Frequently asked questions
What curve methods are there?
Top-to-max adds the gap between the highest score and the maximum to everyone; add-points gives a flat bump; the square-root (“Texas”) curve uses √(raw × max) to help low scores most; linear scale stretches scores so the top becomes the maximum.
Are curved scores capped?
Yes, curved scores are clamped to the maximum possible score so no one exceeds 100%.
Is my data uploaded?
No. Scores are processed entirely in your browser.
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