Quiz Grade Calculator
Calculate your quiz score, letter grade, and number of incorrect answers.
What Is a Quiz Grade Calculator?
A Quiz Grade Calculator helps you quickly calculate your quiz 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 quiz performance.
How to Calculate a Quiz Grade
To calculate your quiz 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 quiz.
Determine how many questions you answered correctly.
Divide correct answers by total questions and multiply by 100.
How to Use the Quiz Grade Calculator
Follow these simple steps to calculate your quiz grade:
For example, enter 20 if your quiz has 20 questions.
For example, enter 17 if you answered 17 questions correctly.
Your percentage, letter grade, and incorrect answers will appear instantly.
Quiz Grade Formula
The standard quiz grade formula is:
To find the number of incorrect answers, subtract the correct answers from the total number of questions.
Quiz Grade Example
Suppose a quiz has 20 questions and you answer 17 questions correctly.
You answered 3 questions incorrectly, so your quiz score is 85%.
Common Quiz Grade Examples
These examples show how different numbers of correct answers translate into quiz percentages.
| Quiz | Correct | Wrong | Score |
|---|---|---|---|
| 10 questions | 9 | 1 | 90% |
| 20 questions | 18 | 2 | 90% |
| 20 questions | 17 | 3 | 85% |
| 25 questions | 20 | 5 | 80% |
| 50 questions | 40 | 10 | 80% |
Quiz Grade Chart
The following is a common grading scale for understanding quiz percentages. Your school or instructor may use a different grading system.
| Percentage | Letter Grade |
|---|---|
| 90%–100% | A |
| 80%–89% | B |
| 70%–79% | C |
| 60%–69% | D |
| Below 60% | F |
How Many Questions Can I Miss on a Quiz?
The number of questions you can miss depends on the total number of questions on the quiz and the score you want to achieve. When each question is worth the same number of points, you can calculate your quiz percentage from the number of correct or incorrect answers.
For example, if you have 20 questions and get 3 wrong, you answered 17 correctly. Your quiz score is:
How Many Questions Can I Miss on a 20-Question Quiz?
On a 20-question quiz where every question is worth the same amount, each incorrect answer lowers your score by 5 percentage points.
| Correct | Wrong | Score |
|---|---|---|
| 20 | 0 | 100% |
| 19 | 1 | 95% |
| 18 | 2 | 90% |
| 17 | 3 | 85% |
| 16 | 4 | 80% |
How Many Questions Can I Miss on a 50-Question Quiz?
On a 50-question quiz where every question has the same value, each wrong answer reduces the score by 2 percentage points.
| Correct | Wrong | Score |
|---|---|---|
| 50 | 0 | 100% |
| 49 | 1 | 98% |
| 45 | 5 | 90% |
| 40 | 10 | 80% |
| 35 | 15 | 70% |
For example, if you get 10 wrong out of 50 questions, you answered 40 correctly. Your quiz score is 80%.
What Is a Good Quiz Grade?
A good quiz grade depends on your school’s grading scale, the difficulty of the quiz, and your 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 check the grading policy for your course.
Quiz Grade Calculator vs. Test Grade Calculator
A quiz grade calculator and a test grade calculator use the same basic percentage formula when the score is based on the number of correct answers. The main difference is the type of assessment being calculated.
Use the Quiz Grade Calculator when you want to calculate a quiz score. For larger tests or exams, you can also use our Test Grade Calculator.
Frequently Asked Questions
How do I calculate my quiz grade?
Divide the number of correct answers by the total number of questions and multiply by 100. For example, 17 correct answers out of 20 questions gives you 85%.
What is 17 out of 20 as a quiz grade?
17 out of 20 is 85%, which is a B using the common grading scale used by this calculator.
What is 18 out of 20 as a quiz grade?
18 out of 20 is 90%, which is an A using the common grading scale used by this calculator.
What is 9 out of 10 as a quiz grade?
9 out of 10 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 20-question quiz, you can miss 2 questions and still score 90%.
Does this calculator work for any number of quiz questions?
Yes. Enter the total number of questions and the number of correct answers to calculate your quiz percentage.
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Calculate Your Quiz Grade
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