Easy Grader: Calculate Test Scores, Percentages & Letter Grades
Use this Easy Grader to quickly calculate test scores, percentages, and letter grades from the number of questions and wrong answers. Enter the total number of questions, add the number of incorrect answers, and get an instant grading chart for every possible score.
The tool works for tests, quizzes, assignments, exams, and other assessments where each question has the same value. You can also choose or create a grading scale that matches your school, course, or syllabus.
Grade a set of papers
Enter the number of questions and get the score for every number of wrong answers — ready to print.
Result
Enter the number of questions to build your grading chart.
How to Use the Easy Grader
Using this easy grader online takes only a few seconds:
- Enter the number of questions on the test. You can enter anywhere from 1 to 200 questions.
- Enter the wrong answers if you want to highlight a particular result in the chart.
- Select Calculate to generate the score, percentage, and letter grade.
- Review the complete grading chart to see how every possible number of wrong answers affects the final grade.
- Use the Copy, Share, or Print options if you need a quick reference while grading papers.
For example, if a test has 10 questions and a student misses 3, the student has 7 correct answers. That produces a score of 7/10, or 70%. With the selected grading scale, the result can then be shown as the corresponding letter grade.
What Is an Easy Grader?
An easy grader, also called an EZ grader, is a grading calculator that helps teachers and students determine test scores without calculating every percentage manually.
Instead of repeatedly working out how many points each student earned, you enter the total number of questions and the number of wrong answers. The calculator generates the possible scores and their corresponding percentages and letter grades.
This is particularly useful when grading a stack of papers with the same number of questions. A teacher can keep the grading chart open or print it and quickly match the number of incorrect answers to the appropriate score.
Easy Grader vs. Grade Calculator
An easy grader and a standard grade calculator can overlap, but they are not always used in exactly the same way.
A typical grade calculator may calculate one student’s percentage from points earned and points possible. An easy grader is especially useful when you are grading a test based on correct and incorrect answers.
For example:
- 20 questions, 2 wrong = 18/20 = 90%
- 25 questions, 3 wrong = 22/25 = 88%
- 50 questions, 5 wrong = 45/50 = 90%
- 100 questions, 12 wrong = 88/100 = 88%
The Easy Grader creates the full range of possible results, making it useful for checking several papers quickly.
How Does the Easy Grader Calculate a Test Grade?
The calculation is straightforward.
First, subtract the wrong answers from the total number of questions:
Correct answers = Total questions − Wrong answers
Then calculate the percentage:
Percentage = (Correct answers ÷ Total questions) × 100
Example
Suppose a quiz contains 25 questions and a student gets 3 wrong.
25 − 3 = 22 correct
Then:
22 ÷ 25 × 100 = 88%
The Easy Grader uses this percentage and your selected grading scale to determine the corresponding letter grade.
This approach works well for assessments where every question carries the same number of points. If questions have different point values or the test uses weighted sections, a points-based or weighted grade calculator may be more appropriate.
Easy Grader for Teachers
An easy grader for teachers can make repetitive test grading much faster.
If you have a class set of tests containing the same number of questions, you do not need to calculate each percentage from scratch. Enter the test size once and use the resulting chart as a reference.
For example, with a 50-question test, the chart can show the result for every possible number of wrong answers. When grading papers, you can simply find the number of incorrect answers and read the corresponding score, percentage, and grade.
This is especially helpful for:
- Multiple-choice tests
- Classroom quizzes
- True/false tests
- Practice tests
- Unit exams
- Short assessments
- Other one-point-per-question tests
You can also print the chart and keep a paper copy beside you while grading.
Easy Grader for Students
Students can use an EZ grader online to check how many questions they answered correctly and understand their test percentage.
For instance, if you know that you missed 4 questions on a 20-question test:
20 − 4 = 16 correct
16 ÷ 20 × 100 = 80%
The calculator can then show the corresponding letter grade according to the selected grading scale.
This makes it easier to understand a test result without manually working through the calculation.
Calculate Test Grades Quickly
A test grade calculator is useful when you know the number of questions and how many answers were incorrect.
Here are a few examples:
| Total Questions | Wrong Answers | Correct | Percentage |
|---|---|---|---|
| 10 | 1 | 9 | 90% |
| 20 | 2 | 18 | 90% |
| 25 | 3 | 22 | 88% |
| 30 | 4 | 26 | 86.67% |
| 40 | 5 | 35 | 87.5% |
| 50 | 5 | 45 | 90% |
| 100 | 10 | 90 | 90% |
The important point is that one wrong answer does not always reduce the grade by the same percentage. On a 10-question test, one mistake changes the score by 10 percentage points. On a 100-question test, one mistake changes it by only 1 percentage point.
Grade Calculator for Different Test Sizes
The Easy Grader supports tests from 1 to 200 questions, so you can use it for both short quizzes and larger exams.
Quick test-size options include:
- 10 questions
- 15 questions
- 20 questions
- 25 questions
- 30 questions
- 40 questions
- 50 questions
- 100 questions
For a custom test, simply enter the actual number of questions.
Why Test Size Matters
The number of questions determines how much each incorrect answer affects the percentage.
For a 10-question test:
- 0 wrong = 100%
- 1 wrong = 90%
- 2 wrong = 80%
- 3 wrong = 70%
For a 50-question test:
- 0 wrong = 100%
- 1 wrong = 98%
- 2 wrong = 96%
- 5 wrong = 90%
- 10 wrong = 80%
That is why using the correct test size is important when calculating a grade.
Grade Percentage Calculator
A grade percentage calculator converts your number of correct answers into a percentage.
The basic formula is:
Grade percentage = (Correct answers ÷ Total questions) × 100
If you know the wrong answers instead, first find the number of correct answers:
Correct answers = Total questions − Wrong answers
Example: 30-Question Test
A student misses 4 questions on a 30-question test.
30 − 4 = 26 correct
26 ÷ 30 × 100 = 86.67%
The percentage can then be matched to the selected grading scale.
Grading Scale
Your letter grade depends on the grading scale selected in the calculator. Schools, colleges, teachers, and countries can use different grade cutoffs, so there is no single grading scale that applies everywhere.
The calculator includes grading-scale options and allows you to create your own scale when your school’s requirements differ.
For example, a common U.S. plus/minus scale may use ranges such as:
| Grade | Percentage |
|---|---|
| A+ | 97%+ |
| A | 93–96.99% |
| A− | 90–92.99% |
| B+ | 87–89.99% |
| B | 83–86.99% |
| B− | 80–82.99% |
| C+ | 77–79.99% |
| C | 73–76.99% |
| C− | 70–72.99% |
| D+ | 67–69.99% |
| D | 63–66.99% |
| D− | 60–62.99% |
| F | 0–59.99% |
Always check your syllabus or school’s grading policy before treating a percentage as a final letter grade.
Create a Custom Grading Scale
Not every school uses the same cutoffs. That’s why the Easy Grader lets you choose an appropriate grading scale or create your own.
This can be useful when:
- Your teacher uses different grade boundaries.
- Your school has a specific grading policy.
- Your course uses a custom syllabus.
- You need a scale without plus/minus grades.
- Your institution uses different passing requirements.
The calculator also provides rounding options before assigning the letter grade, which can matter when a test produces a decimal percentage.