By Muhammad Mansoor Haidar, owner and developer · Last updated October 24, 2026
Start with the most-read guides
“How to Grade a Stack of 30 Tests in 15 Minutes” is the workflow teachers ask about most: build the chart once, then grade by lookup instead of redoing the same division thirty times.
“When to Curve Grades” walks through the five curving methods, the signs that a test actually needs one, and the fairness checks to run before curved grades are posted.
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Every guide ends at the calculator it describes. The EZ Grader chart, weighted GPA calculator, grade curve calculator and the rest of the suite are free, need no sign-up, and run entirely in your browser.
From the latest guide
Five raw scores — 55, 62, 70, 78, 85 — curved two different ways.
- Class mean before
- 70
- Flat +5 curve
- 60, 67, 75, 83, 90
- Bell curve (average 75)
- 61, 67.6, 75, 82.4, 89
Same class, two defensible answers. The guide explains how to choose between them.
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Related grade calculators
- How to Grade a Stack of 30 Tests in 15 MinutesThe chart-first workflow that turns grading into lookup.
- When to Curve Grades: A Teacher’s GuideFive methods, the fairness checks, and when to leave scores alone.
- For Schools: free embedsPut these calculators on your own school website.
- Weighted GPA calculatorHonors and AP/IB bonuses, side-by-side results.