Calculate a grade in seconds
The calculator subtracts missed points from the total possible points, then divides the earned points by the total. Your score updates immediately whenever you change an input.
- 1
Enter total questions
Use the number of questions or the total points available on the assignment.
- 2
Enter wrong answers
Add the number of answers or points missed. Fractional points are supported.
- 3
Read or print the result
Use the highlighted result or print the complete grade chart.
Flexible grading options
Grade calculator vs. grading calculator: is there a difference?
No. "Grade calculator" and "grading calculator" describe the same tool — one that takes a raw score and returns a percentage and letter grade. Searches for a free grading calculator, an online grading calculator, or a teacher grade calculator all land on the same job: fast, repeatable marking without a spreadsheet. This page works for every one of those uses.
Using this as a teacher grade calculator
Set the total number of questions once, then work down the stack of papers changing only the wrong-answer count. Each entry updates the score, the letter grade, and the full grading chart live, so a class set of 30 quizzes takes about a minute. Print the chart once and it doubles as a marking key for a substitute or a co-teacher.
What is an easy grader?
An easy grader is a classroom tool that converts total questions and wrong answers into the number correct, percentage score, and letter grade. It also creates a grading chart for every possible raw score, which helps teachers grade quizzes, tests, and exams without calculating each answer sheet separately. The same tool is sometimes searched for as an "ez grader" or "ezgrader" — different spelling, same calculation. See the dedicated easy grader / ez grader guide for more on both terms.
Question-based, points-based, or weighted: which calculator do you need?
Match the calculator to how the assignment is actually scored. A single test with equally weighted questions uses this page. A course scored on total points earned across the term uses a points calculator. A course split into weighted categories — homework 20%, tests 50% — uses a gradebook calculator. The percentage formula is the same everywhere; point-based grading just adds partial credit.
| What you’re grading | Enter | Use |
|---|---|---|
| One test or quiz, equal-value questions | Total questions, wrong answers | This grade calculator |
| One assignment scored on points | Points possible, points lost | Points grade calculator |
| A whole course, weighted categories | Each category’s weight and score | Gradebook calculator |
| Score needed on a remaining final | Current grade, final’s weight | Final grade calculator |
Using this as a grade percentage calculator
Every result above is a grade percentage calculator at its core — points or questions in, a percentage out. Enter total points instead of total questions to use it as a grade calculator with percentages directly: type the points possible into "Total questions," the points lost into "Wrong answers," and the live result is your percentage grade, no manual division required.
| Points earned | Points possible | Grade percentage |
|---|---|---|
| 17 | 20 | 85% |
| 42 | 50 | 84% |
| 88 | 100 | 88% |
Bonus or extra-credit points work the same way as a grade calculator with points: add them in Calculator options and they're included before the percentage is calculated, which can push a result above 100%.
From a percentage to a letter grade and GPA
Once you have a percentage, it still needs converting to a letter grade and GPA value using your school's scale — the default 93% for an A here is common but not universal. See the full US grading scale for every percentage range, letter grade, and GPA value side by side, including strict and lenient presets.
What grade is a specific number of wrong answers?
Each test length has its own fixed scale, because one question is worth 100 ÷ total questions. On a 25-question test each question is 4%, so 3 wrong is 88% (a B+); on a 50-question test each is 2%, so 3 wrong is 94% (an A). These pages give the full wrong-answer-to-letter-grade table for common test sizes:
- Grading scale for 10 questions
- Grading scale for 12 questions
- Grading scale for 15 questions
- Grading scale for 20 questions
- Grading scale for 25 questions
- Grading scale for 30 questions
- Grading scale for 40 questions
- Grading scale for 50 questions
- Grading scale for 60 questions
- Grading scale for 100 questions
Use the result with the correct policy
The calculator provides the arithmetic, while the syllabus or school policy determines the official result. Confirm the assigned A–F grading scale, decimal precision, rounding method, late penalties, extra credit, and whether scores above 100% are capped.