Free grading calculator for teachers
Grading Calculator: Online Grader Chart for Teachers
Type how many questions or points a test has and read the score for every number wrong, from a perfect paper down to zero. Choose a grading scale or set your own cutoffs, count half points, and print the chart to keep next to your answer key.
17/20 = 85% B
3 wrong out of 20.
- A 90–100
- B 80–89
- C 70–79
- D 60–69
- F below 60
20 questions or points
| Wrong | Right | Score | Grade |
|---|---|---|---|
| 0 | 20 | 100% | A |
| 1 | 19 | 95% | A |
| 2 | 18 | 90% | A |
| 3 | 17 | 85% | B |
| 4 | 16 | 80% | B |
| 5 | 15 | 75% | C |
| 6 | 14 | 70% | C |
| 7 | 13 | 65% | D |
| 8 | 12 | 60% | D |
| 9 | 11 | 55% | F |
| 10 | 10 | 50% | F |
| 11 | 9 | 45% | F |
| 12 | 8 | 40% | F |
| 13 | 7 | 35% | F |
| 14 | 6 | 30% | F |
| 15 | 5 | 25% | F |
| 16 | 4 | 20% | F |
| 17 | 3 | 15% | F |
| 18 | 2 | 10% | F |
| 19 | 1 | 5% | F |
| 20 | 0 | 0% | F |
The chart is calculated in your browser; nothing you type is uploaded or saved. Scores are rounded half up to the precision you choose, and the letter is based on that rounded score, so 89.5% shown as 90% earns the 90 band. Check your school’s own grading scale and rounding policy.
How to use the grading chart
Enter the number of questions, or the total points if questions are worth different amounts. The chart lists every possible number wrong with the matching score and letter. Type a number in Number wrong to check one paper at a glance.
- Choose Half points to grade partial credit in 0.5 steps.
- Pick a scale or enter your own A, B, C and D cutoffs.
- Add a title, then print one chart per test length.
How each score is calculated
Score = (total − number wrong) ÷ total × 100. For a 20-question quiz with 3 wrong: 17 ÷ 20 × 100 = 85%. For 25 questions with 3 wrong: 22 ÷ 25 × 100 = 88%. The letter comes from the rounded score and the cutoffs of the scale you choose.
A grading chart for any test length
Teachers often keep a chart for each test length so they can grade by counting wrong answers. This one works for 1 to 500 questions or points, shows both the number wrong and the number right, and breaks long charts into columns of 25 rows so a 100-point test still fits on one printed page.
Grading scales differ
There is no single national grading scale in the United States. The College Board describes one common system in which D is 66–69 and anything below 65 is failing, and many schools use a 10-point scale or plus and minus grades instead. Choose the scale that matches your school, or type your own cutoffs.
Other grade calculators
Add up points from several assignments, combine categories with different weights, or work out the score you need on a final exam to reach the grade you want.
More grade calculators
Points, weighted grades and the score you need on a final.
Points Grade Calculator: Total Points to Percent
Add up points earned and points possible from up to 30 assignments to get the overall percent and letter grade on a scale you choose.
Weighted Grade Calculator: Category Weights to Grade
Combine homework, quiz, test and other category averages by their weights to get the overall grade, with a breakdown of how much each category adds.
Final Grade Calculator: What Do I Need on My Final?
Find the score you need on your final exam to reach a target grade, from your current grade and the final’s weight, plus the score needed for each letter.
The studio notebook
A useful place to begin.
Clear steps, considered details, and ideas you can put to use.
How to Calculate a Test Score (Percent, Points, Wrong Answers)
Work out a test score as a percentage from questions right, questions wrong or points earned, with worked examples, half points and rounding.
Letter Grade Scales Explained: 10-Point and Plus/Minus
See how a common 10-point letter grade scale and a plus/minus scale work, why schools differ, and how rounding affects a cutoff such as 89.5.
How Weighted Grades Work: Categories, Weights and Examples
Learn how weighted grades combine homework, quizzes and tests, with a worked example, what to do when weights do not total 100, and common mistakes.
What Grade Do I Need on My Final? Formula and Examples
Use one formula to find the score you need on a final exam to reach a target grade, with worked examples and notes on what counts as your current grade.
How to Curve Grades: Four Common Methods With Examples
Compare four ways to curve test scores: a flat bonus, scaling the top score to 100, the square root curve and a target average, with worked arithmetic.
Grade Faster With a Grading Chart: A Teacher Workflow
A practical workflow for grading a test with a chart: build the answer key, count wrong answers, read the score, handle half points and double-check.
A few helpful answers
Before you begin.
How do I calculate a test score?
Subtract the number wrong from the total, divide by the total and multiply by 100. 3 wrong on a 20-question quiz is 17 ÷ 20 = 85%.
Can I grade half points or partial credit?
Yes. Set Count by to Half points and the chart lists every 0.5 step, such as 1.5 wrong (92.5% on a 20-point quiz).
Which grading scale should I use?
Use your school’s or district’s scale. The calculator includes a 10-point scale, a plus/minus scale and a 7-point scale, and you can type your own A, B, C and D cutoffs.
Does 89.5% round up to an A?
With whole-percent rounding, 89.5% is shown as 90% and earns the 90 band. With one decimal place it stays 89.5% and earns a B on a 10-point scale. Follow your school’s rounding policy.
Can I print the grading chart?
Yes. Press Print the grading chart for a one-page chart with your title. Long charts are split into columns of 25 rows.
Is anything saved?
No. The calculator runs in your browser and nothing you type is uploaded or stored.