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Grading Chart
Printable grading charts for any test size, from 5 to 100 questions.
Teachers17 of 20 correct · 3.0 grade points on the US Standard (90/80/70/60) scale
Grading chart for 20 questions
| Wrong | Correct | Percentage | 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 |
A grading chart lists every possible result for a test of a given size: how many wrong, how many right, the percentage, and the letter grade. Set the number of questions and this page builds the complete chart on the scale you choose. Teachers use it to mark a whole class set without redoing the arithmetic for each paper, and to answer the student who wants to know what one more correct answer would have been worth.
How to use the Grading Chart
- Enter the number of questions on the test.
- Choose the grading scale your school uses.
- Read or print the full chart for that test size.
- Mark each paper by finding its wrong-answer count in the first column.
Formula
The chart applies that formula once for every possible number of wrong answers, from zero wrong (100%) down to every question wrong (0%), and labels each row with its letter grade.
Worked example
For a 25-question quiz, each question is worth 4%. The chart shows 0 wrong = 100% (A+), 1 wrong = 96% (A), 2 wrong = 92% (A-), 3 wrong = 88% (B+), 4 wrong = 84% (B), and 5 wrong = 80% (B-). A teacher marking thirty quizzes reads each result straight off the row instead of calculating thirty percentages.
Good to know
Test size changes the steepness of a chart. On a 10-question quiz each question is worth 10%, so two wrong answers already cost a full letter grade and a half; on a 50-question test each question is worth 2% and the steps are gentle. This is why short quizzes feel harsh and why many teachers either weight them lightly or grade them on completion. When you print a chart, check that the scale printed at the top matches the scale in your mark book, particularly if your school uses plus/minus grades.
US grading scale reference
The table below is the US plus/minus scale used across this site. Where this tool offers other scales, the Canadian scale sets an A from 85% with a pass at 50%, and the Australian scale uses the bands HD (85%+), D (75-84%), C (65-74%), P (50-64%) and F (below 50%) on a 7.0 GPA.
| Letter grade | Percentage | GPA points |
|---|---|---|
| A+ | 97–100% | 4.0 |
| A | 93–96% | 4.0 |
| A- | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B- | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C- | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D- | 60–62% | 0.7 |
| F | 0–59% | 0.0 |
Frequently asked questions
How do I print a grading chart?
Set the question count and scale, then use your browser print command. The chart is laid out as a plain table that fits a single page for most test sizes.
What is each question worth on a 20-question test?
Five percent. The chart for 20 questions steps down in 5% increments: 100, 95, 90, 85, and so on.
Why does one wrong answer cost more on a short quiz?
Because the percentage per question is 100 divided by the number of questions. Ten questions means 10% each; fifty questions means 2% each.
Can I make a chart for a points-based test?
A chart works when every question is worth the same. For uneven points, the Test Grade Calculator converts each student score individually.
Which chart do I need for a 100-question exam?
Set the total to 100. Each question is then worth exactly 1%, so the percentage equals the number of correct answers.
Go deeper
Prefer the full walkthrough? Read our guide: What Do Letter Grades Mean? — it explains the method step by step with more worked examples.
Sources & further reading
- Education Week — grading and assessment coverage — Reporting and research on classroom grading practice for K-12 educators.
- ASCD — resources on fair and accurate grading — Professional guidance for educators on assessment and reporting.
Related tools
Last reviewed: November 2026. Results from this calculator are estimates based on the published scales above; your school's recorded grade is the official one.