Create an instant grading chart from the number of test questions. See the selected score, percent, letter grade, points per question, passing status, and every missed-question row.
On a 20-question test, each question is worth 5 percentage points. Missing 2 questions gives 18 ÷ 20 × 100 = 90%, usually an A on a standard 90/80/70/60 scale.
Enter test details.
How to use the EZ grader
Enter the total number of questions and the number missed. The calculator shows the selected percentage and letter grade, then builds a full chart for every possible number wrong. Teachers can use the chart while marking papers, and students can use it to check a test score quickly.
Use the chart to scan how each missed-question count maps to percent and letter grade.
Use the selected score box to calculate one specific test result without reading the full chart.
Grade chart
The chart updates automatically when you change total questions, wrong answers, passing percent, or letter scale.
| Wrong | Correct | Percent | Letter |
|---|
EZ grader formula
The formula is (total questions − wrong answers) ÷ total questions × 100. First find how many answers are correct, then divide by total questions, then multiply by 100 to convert the fraction to a percent.
Teacher notes for grading charts
| Setting | Why it matters |
|---|---|
| Total questions | Controls how many percentage points each question is worth. |
| Passing percent | Lets the pass/fail status match your classroom policy. |
| Letter scale | Standard scale is simple; plus/minus gives more detailed grade bands. |
| Rounding | Schools may round differently, so official gradebooks can vary. |
Common mistakes
- Entering the number correct into the “wrong” field.
- Using a default letter scale when the class has a custom scale.
- Forgetting that extra credit, partial credit, and weighted sections can change the final grade.
- Rounding percentages differently from the official gradebook.
- Comparing two tests with different question counts without checking points per question.
EZ Grader FAQs
What is 2 wrong out of 20?
18 ÷ 20 × 100 = 90%. On a standard 90/80/70/60 scale, that is an A.
What is 5 wrong out of 25?
20 ÷ 25 × 100 = 80%. On a standard scale, that is a B.
Can I change the passing score?
Yes. Change the passing percent field to match your class, school, or assignment policy.
Does this support partial credit?
This EZ grader is built for whole questions wrong. For partial credit or points-based assignments, use the Grade Calculator instead.
Is the letter grade official?
No. The letter grade is an estimate based on the selected scale. Use the teacher’s or school’s official grading policy for final records.
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Reviewer
This educational math content is reviewed under the SolverCalc reviewer rule by Prof. Dr. Khalil Mudassar. WordPress adds the author bio automatically, so this page does not include a duplicate author box.
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