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Class Grade Calculator (Batch Grader)
Grade a whole class set at once: one list of wrong answers in, a full results table out.
Teachers| Student | Wrong | Correct | Percentage | Grade |
|---|---|---|---|---|
| Student 1 | 0 | 25 | 100.0% | A |
| Student 2 | 1 | 24 | 96.0% | A |
| Student 3 | 2 | 23 | 92.0% | A |
| Student 4 | 4 | 21 | 84.0% | B |
| Student 5 | 5 | 20 | 80.0% | B |
| Student 6 | 8 | 17 | 68.0% | D |
Class average: 86.7% across 6 students.
Grading thirty papers with a chart works, but typing each result into a mark book still takes time and invites transcription slips. This batch grader takes the whole class at once: enter the total number of questions, then list how many questions each student missed, one per line, and it produces a results table with the correct count, percentage and letter grade for every student, ready to transfer into your gradebook.
How to use the Class Grade Calculator (Batch Grader)
- Enter the total number of questions on the test.
- Choose the grading scale for the class.
- Type or paste one wrong-answer count per line, in mark-book order.
- Copy the percentages and letter grades from the results table into your gradebook.
Formula
The same EZ grader formula, applied to every line of your list at once, on the grading scale you selected for the class.
Worked example
A 25-question quiz marked for a small group gives wrong counts of 0, 1, 2, 4, 5 and 8. The results table reads 100% (A+), 96% (A), 92% (A-), 84% (B), 80% (B-) and 68% (D+). The class summary shows the spread at a glance, and the low outlier prompts a check of that paper before the grades are recorded.
Good to know
Batch grading pairs naturally with a seating-plan mark list: collect papers in register order, note wrong counts in the same order, and the output lines up with your gradebook rows. Before you record the results, scan the table for impossibilities, a wrong count higher than the question total or a sudden cluster of identical scores, both of which usually mean a counting slip rather than a class-wide event. Keep the raw wrong counts in your records; percentages can always be rebuilt from them.
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 many students can I grade at once?
The list accepts as many lines as you paste; a typical class of 30-35 works comfortably, and larger lecture groups work too, since the calculation runs in your browser.
What if students took different test versions?
Grade each version separately with its own question total if the versions differ in length. If only the question order differs, one batch run is fine.
Can I include student names?
You can type a name before the number on each line, for example "Aisha - 3", and the table keeps the label with its result. Nothing you enter leaves your browser.
What if a student was absent?
Leave absent students out of the list and record them separately in your gradebook; entering zero wrong would falsely award them 100%.
Does this work for points-based tests?
This tool counts wrong answers out of a question total. For points, grade the batch with the Test Grade Calculator one score at a time, or total the class with the points calculator.
Go deeper
Prefer the full walkthrough? Read our guide: How to Calculate a Weighted Grade — 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.