Test Grade Calculator
Calculate your test score, letter grade, and number of incorrect answers.
What Is a Test Grade Calculator?
A Test Grade Calculator helps you quickly calculate your test score as a percentage and determine the corresponding letter grade. Enter the total number of questions and the number of correct answers to see your result instantly.
The calculator also shows how many questions you answered incorrectly, making it easy to understand your test performance.
How to Calculate a Test Grade
To calculate your test grade, divide the number of correct answers by the total number of questions and multiply the result by 100.
Count all questions included on the test.
Determine how many questions you answered correctly.
Divide correct answers by total questions and multiply by 100.
How to Calculate Your Test Percentage
To calculate a test grade, divide the number of points you earned by the total number of points possible, then multiply by 100. This gives you your test percentage or test score percentage.
For example, if you earn 42 points on a test worth 50 points, your test percentage is:
You can use the same calculation for tests with different numbers of questions or points. When every question is worth the same number of points, you can also calculate your score by dividing the number of correct answers by the total number of questions.
For example, if you answer 18 out of 20 questions correctly, your test score is 90%.
Test Grade Formula
The standard test grade formula is:
To find the number of incorrect answers, subtract the correct answers from the total number of questions.
Test Grade Example
Suppose a test has 40 questions and you answer 34 questions correctly.
You answered 6 questions incorrectly, so your test score is 85%.
Test Grade Chart
The following common grading scale can help you understand your test percentage. Grading policies may vary by school or instructor.
| Percentage | Letter Grade |
|---|---|
| 90%–100% | A |
| 80%–89% | B |
| 70%–79% | C |
| 60%–69% | D |
| Below 60% | F |
How Many Questions Can I Miss?
The number of questions you can miss depends on the total number of questions and the score you want to achieve.
For example, on a 40-question test:
| Correct | Wrong | Score |
|---|---|---|
| 40 | 0 | 100% |
| 36 | 4 | 90% |
| 34 | 6 | 85% |
| 32 | 8 | 80% |
| 28 | 12 | 70% |
What Is a Good Test Grade?
A good test grade depends on your school’s grading scale, the difficulty of the test, and your personal academic goals. On a common grading scale, a score of 90% or higher is generally considered an A, while 80%–89% is generally considered a B.
Your teacher or school may use a different grading system, so always check the grading policy that applies to your course.
Frequently Asked Questions
How do I calculate my test grade?
Divide the number of correct answers by the total number of questions and multiply by 100. For example, 34 correct answers out of 40 questions gives you 85%.
What is 34 out of 40 as a grade?
34 out of 40 is 85%, which is a B using the common grading scale used by this calculator.
What is 36 out of 40 as a grade?
36 out of 40 is 90%, which is an A using the common grading scale used by this calculator.
How many questions can I miss and still get a 90%?
The number depends on the total number of questions. On a 40-question test, you can miss 4 questions and still score 90%.
Does this calculator work for any number of questions?
Yes. Enter the total number of questions and the number of correct answers to calculate your test percentage.
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