Teacher Grading Calculator
Enter student scores and a grading scale to assign letter grades, see class distribution, and optionally apply a curve.
Built for teachers.
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Grade Distribution
Letter grade assignment maps numeric scores to letter grades based on a grading scale.
Standard grading scale (10-point):
| Score Range | Letter Grade |
|---|---|
| 90–100 | A |
| 80–89 | B |
| 70–79 | C |
| 60–69 | D |
| Below 60 | F |
7-point scale (stricter):
| Score Range | Letter Grade |
|---|---|
| 93–100 | A |
| 85–92 | B |
| 77–84 | C |
| 70–76 | D |
| Below 70 | F |
Curving grades:
A simple curve adds points so the highest score equals 100:
Curve = 100 − Highest Score
Curved Score = Original Score + Curve
Class statistics to track:
- Mean: Average class performance
- Median: Middle score (less affected by outliers)
- Standard deviation: How spread out the scores are
- Pass rate: Percentage scoring D or above
Healthy class distribution (typical target):
- A: 15–20% | B: 25–30% | C: 30–35% | D: 10–15% | F: 5–10%