Percentage Grade Calculator
Calculate your grade percentage from the marks you earned and the total marks available. Add multiple assessments to calculate a current or weighted course grade and see the equivalent letter grade.
Calculate your grade percentage
Enter the marks earned and total marks for each assignment, test, quiz, project, or exam. Add more rows if you want to combine several grades.
Percentage to letter grade reference
This table is a general reference only. Schools, colleges, universities, courses, and instructors may use different percentage boundaries.
| Percentage | General letter grade | Typical interpretation |
|---|---|---|
| 90–100% | A | Excellent |
| 80–89% | B | Very good |
| 70–79% | C | Satisfactory |
| 60–69% | D | Passing in some systems |
| Below 60% | F | Failing in many systems |
What is a percentage grade?
A percentage grade shows how many marks you earned compared with the maximum number of marks available. It is one of the simplest ways to express academic performance because the result is shown as a percentage from 0% to 100%.
For example, if you score 42 marks out of 50, your percentage is 84%. The calculation does not depend on the name of the assessment. The same method can be used for a quiz, assignment, test, midterm, final exam, project, or other graded work.
How to calculate a percentage grade
To calculate a grade percentage, divide the number of marks you earned by the total number of marks possible, then multiply the result by 100.
Suppose an exam is worth 80 marks and you receive 68 marks. Your percentage would be:
Example: 68 out of 80
Marks earned: 68
Total marks: 80
Calculation: (68 ÷ 80) × 100
Grade percentage: 85%
You can use the calculator above for the same calculation without doing the formula manually.
How the percentage grade calculator works
The calculator has two useful modes. The first calculates a percentage from marks earned and total marks. This is ideal when you have actual scores such as 43 out of 50 or 87 out of 100.
The weighted mode is useful when different assessments contribute different amounts to your final course grade. For example, an assignment might be worth 20% of the course while a final exam is worth 40%.
Using marks and total marks
Enter the marks you received and the maximum marks available. If you add several assessments, the calculator combines their marks and calculates the overall percentage based on the total marks.
Using weighted grades
In weighted mode, enter the percentage you achieved on each assessment and the percentage weight assigned to that assessment. The calculator multiplies each score by its weight and adds the results together.
Examples of percentage grade calculations
| Marks | Total | Percentage |
|---|---|---|
| 45 | 50 | 90% |
| 72 | 80 | 90% |
| 84 | 100 | 84% |
| 36 | 50 | 72% |
| 27 | 40 | 67.5% |
How to calculate a weighted course grade
A weighted course grade is different from simply combining all marks. In a weighted grading system, each assessment has a specific percentage contribution to the final course grade.
For example, imagine your course uses the following grading structure:
- Homework: 20% of the final grade
- Midterm: 30% of the final grade
- Final exam: 50% of the final grade
If you score 90% on homework, 80% on the midterm, and 86% on the final, the weighted calculation is:
Weighted grade example
Homework: 90 × 0.20 = 18
Midterm: 80 × 0.30 = 24
Final exam: 86 × 0.50 = 43
Final course grade = 18 + 24 + 43 = 85%
This is why a simple average of assessment percentages can give the wrong answer when the assessments have different weights.
Percentage grade vs. letter grade
A percentage and a letter grade are two different ways of reporting the same academic result. A percentage gives a numerical score, while a letter grade groups scores into categories such as A, B, C, D, or F.
The exact percentage required for each letter grade depends on the grading policy used by your school or instructor. For example, one institution may define an A as 90–100%, while another may use a different boundary.
For that reason, the letter-grade table on this page should be treated as a general reference rather than an official conversion chart.
Can you convert a percentage to GPA?
A percentage does not have one universal GPA equivalent. GPA conversion depends on the grading scale and academic institution.
In many systems, the process is roughly:
- Start with the percentage score.
- Convert the percentage into the institution's letter grade.
- Convert the letter grade into grade points using the institution's GPA scale.
This means an 85% score should not automatically be treated as one particular GPA value everywhere. If you need an official GPA conversion, use your school's published grading policy.
Percentage grade and GPA are not the same
Percentage grades and GPA measure academic performance in different formats. A percentage is normally based directly on marks, while GPA uses grade points and may also take course credit hours into account.
For example, two students could have similar percentages but different GPAs if their schools use different grading scales or if their courses have different credit values.
If you already have letter grades and credit hours and want to calculate your grade point average, use a dedicated GPA calculator rather than trying to turn the percentage into a universal GPA value.
Common percentage grade mistakes
Most percentage calculations are straightforward, but a few mistakes can produce an incorrect result:
- Using the wrong total: Make sure the denominator is the maximum marks for that assessment.
- Averaging percentages when weights are different: Weighted assessments need to be calculated using their assigned weights.
- Confusing marks with percentage: 45 out of 50 is not 45%; it is 90%.
- Assuming every grading scale is the same: Letter grade boundaries can vary by school or course.
- Rounding too early: Keep the original values during the calculation and round the final result.
What percentage is a good grade?
There is no single percentage that is considered a good grade in every school or course. A score that receives an A in one grading system may fall into a different letter category somewhere else.
Your course syllabus or institution's official grading scale is the best source for deciding whether your percentage meets the target for an A, B, scholarship requirement, program requirement, or other academic goal.
When should you use this calculator?
This percentage grade calculator is useful whenever you know the marks earned and want to quickly determine the corresponding percentage. You can use it for individual assessments or combine multiple assessments when they are being treated according to their marks or assigned weights.
- Quiz and test scores
- Assignment grades
- Midterm and exam marks
- Project grades
- Current course percentages
- Weighted course assessments
- Checking percentage from marks out of a total
Frequently asked questions
Answers about percentage grades, marks, weighted scores, letter grades, and percentage-to-GPA conversion.
Divide the marks you earned by the total marks possible and multiply by 100. For example, 45 out of 50 is (45 ÷ 50) × 100 = 90%.
80 out of 100 is 80%. Because the total is already 100, the number of marks earned directly represents the percentage.
45 out of 50 is 90%. The calculation is (45 ÷ 50) × 100 = 90%.
Multiply each assessment percentage by its course weight and add the results. For example, an 80% midterm worth 30% contributes 24 percentage points to the final grade.
No universal percentage-to-GPA conversion exists. The percentage is normally mapped to a letter grade first, and the letter grade is then mapped to grade points according to the institution's GPA scale.
It depends on the grading scale. Some institutions use 90% or above for an A, while others use different boundaries. Check your course or school's official grading policy.
Yes. You can enter your completed assessments and their marks. If your course uses different assessment weights, use the weighted grades mode and enter each assessment's percentage and weight.
The calculations are performed in your browser using JavaScript. The calculator itself does not need to send your entered grades to a calculator server to perform the calculation.