EZ Grader — the teacher's grading chart, online
Set the number of questions, enter how many a student missed, and read the grade. Below is the full chart for your test size — the row for each possible number wrong, with percent and letter grade.
Grading chart
| Wrong | Correct | Percent | Grade |
|---|---|---|---|
| 0 | 20 | 100.0% | A+ |
| 1 | 19 | 95.0% | A |
| 2 | 18 | 90.0% | A- |
| 3 | 17 | 85.0% | B |
| 4 | 16 | 80.0% | B- |
| 5 | 15 | 75.0% | C |
| 6 | 14 | 70.0% | C- |
| 7 | 13 | 65.0% | D |
| 8 | 12 | 60.0% | D- |
| 9 | 11 | 55.0% | F |
| 10 | 10 | 50.0% | F |
| 11 | 9 | 45.0% | F |
| 12 | 8 | 40.0% | F |
| 13 | 7 | 35.0% | F |
| 14 | 6 | 30.0% | F |
| 15 | 5 | 25.0% | F |
| 16 | 4 | 20.0% | F |
| 17 | 3 | 15.0% | F |
| 18 | 2 | 10.0% | F |
| 19 | 1 | 5.0% | F |
| 20 | 0 | 0.0% | F |
Letter bands are the common US convention (A ≥ 93, A− ≥ 90 …). Districts vary — when in doubt, the percent is the grade.
For your classroom site
Teachers and schools can embed our free calculators — including the final-exam calculator your students actually ask for — with one line of code.
Questions
Is this the same as the plastic EZ Grader slide chart?
Yes — the same math teachers have used on the cardboard-and-plastic chart for decades: set the number of questions, read the grade for each number wrong. This one just also shows the letter grade.
Why does 90% show as A- and not A?
The chart uses the most common US bands: A starts at 93, A− at 90, B+ at 87, and so on. If your school rounds differently, the percent column is the one to trust.
Can I grade a test with extra credit?
Grade the base test first, then add extra credit points to the resulting percent — that is how most syllabi define it.