Enter the number of questions and number of wrong answers to get your test grade as a percentage, letter grade, and fraction. You can also choose between grading scales — standard (A, B, C, D, F) or plus/minus (A+, A, A−, B+, ...) — to match your school's system. Also try the calculate Aspect Ratio.
Percentage Score
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Letter Grade
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Correct Answers
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Fraction Grade
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Ever wonder exactly what grade you—or your students—earned on a test? Whether you're a teacher looking to help set a grading scale or a student aiming to understand your performance, the test grade calculator is the quickest way to convert raw scores into precise percentage and letter grade results. With a single calculation, you'll know where your academic performance stands, helping you identify strengths and highlight areas needing attention. No more guesswork after a tough quiz or exam—see your score instantly and use that insight to make smart decisions about studying, retakes, or tracking progress throughout the school year.
The test grade calculator – advanced usage offers more than just quick results—it also allows for flexible grading scale customization, supporting everything from simple quizzes to the most complex assessment scenarios. This tool ensures your education results are accurate, whether you’re grading midterms, final exams, or classroom tests.
Let’s break down exactly how teachers, students, and parents use the grade calculator:
This process follows the core score formula, widely used in us schools and universities:
percentage\ score = 100 \times \frac{\#total - \#wrong}{\#total}Where:
For those who prefer calculating with earned points, divide the earned points by the total points possible:
percentage\ score = \left(\frac{\#correct}{\#total}\right) \times 100The tool will then convert the percentage score into a letter grade using the grading system selected—whether you wish to ignore the signs for simpler grading, or work with detailed plus/minus distinctions.
The grade calculator uses a standard or customizable scale to interpret every percentage score as a precise letter grade. The full grading scale table below displays default ranges—grades may be adjusted in the grading scale calculator settings if your school has different standards:
| Letter Grade | Percentage Range (%) |
|---|---|
| A+ | 97–100 |
| A | 93–96 |
| A- | 90–92 |
| B+ | 87–89 |
| B | 83–86 |
| B- | 80–82 |
| C+ | 77–79 |
| C | 73–76 |
| C- | 70–72 |
| D+ | 67–69 |
| D | 63–66 |
| D- | 60–62 |
| F | Below 60 |
This grading scale aligns with the standard grading system for US schools and universities. However, teachers may modify ranges to set a different passing grade or use a custom scale. For instance, some classes or exams may set grade D- at 50% for easier passing, or shift the A threshold to increase challenge. Passing score could be higher or lower depending on your particular education requirements.
With the test score calculator, you can do more than run a basic calculation—advanced features help determine grades for any points system and avoid typical errors. Here’s how to make the calculator a true asset for any assessment or academic performance review.
The grading scale calculator is highly adaptable. If you need to change the grading scale from the default one:
This customization ensures every test, quiz, or exam fits the exact requirements of your school, classes, or teacher.
Tip: If you want to double-check results, you can manually multiply the result by 100 after using the formula, or refer to the grade ranges in the table for instant guidance.
Here are several real-life scenarios showing how you can use the test score calculator for fast answers to common grading questions:
With these resources, you can streamline every aspect of grading—from single test scores to the most complex academic performance evaluations.
Divide the number of correct answers by the total number of questions, then multiply by 100. For example, if you got 32 out of 40 correct, your score is (32 / 40) × 100 = 80%, which is a B on a standard grading scale. See also our Hours Calculator.
The standard scale uses broad letter grades: A (90–100%), B (80–89%), C (70–79%), D (60–69%), and F (below 60%). The plus/minus scale breaks each letter into three tiers — for example, A+ (97–100%), A (93–96%), and A− (90–92%) — giving a more precise indication of performance.
Yes. 27 out of 40 equals 67.5%, which typically corresponds to a D+ on a plus/minus scale or a D on a standard scale. While it is technically passing in most schools, it is considered below average.
If you got 7 wrong out of 40, you answered 33 correctly, giving you a score of (33 / 40) × 100 = 82.5%. On a standard scale that is a B, and on a plus/minus scale it is a B−. You might also find our use the Decision Matrix Calculator useful.
Yes. 75 out of 80 equals 93.75%, which is an A on both the standard and plus/minus grading scales. On the plus/minus scale it falls precisely into the A range (93–96%).
In most educational systems, a passing grade starts at 60%, which corresponds to a D on a standard scale. However, individual schools or courses may set a higher passing threshold, sometimes 65% or 70%, so always check your institution's policy.
Yes. Simply enter the total number of questions and set wrong answers to (total − correct). For example, if you got 35 right out of 50, enter 50 total questions and 15 wrong answers to get your grade.
On the standard scale: A = 90–100%, B = 80–89%, C = 70–79%, D = 60–69%, F = below 60%. The plus/minus scale further divides these, for instance B+ = 87–89%, B = 83–86%, B− = 80–82%.