Easy grader chart for teachers
Speeds up marking tests with equal value questions: enter the question count and one student mistakes, then use the chart for the rest.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter number of questions and number wrong.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Score = (questions − wrong) ÷ questions × 100. Each question is worth 100 ÷ questions.
Example
Inputs: Number of questions = 20, Number wrong = 3. Result: Score: 85%; Correct answers: 17; Value of one question: 5%.
Limits and caveats
- It assumes every question carries the same points.
- Grades in the chart use the common US scale.
Questions about this tool
What is the chart for?
It saves a calculation per paper: count the mistakes and read the matching row for the score and grade.
What if questions have different points?
Use the test score percentage calculator and enter total points instead of question counts.
Are chart scores rounded?
Chart percentages are rounded to 2 decimals, while grades come from the exact score.