Grade Percentage Calculator
Combine weighted marks into a course grade.
Use the Grade Percentage Calculator tool
What this grade percentage calculator does
Grade Percentage Calculator does two jobs. The converter turns a raw mark and maximum into a percentage and a letter band. The weighted table combines assessments that carry different weights and different maximum marks, which is where hand calculations usually go wrong.
The letter bands are a common A+/A/B/C/D/F scale, not a standard. Schools and universities define their own cutoffs, and some use GPA rather than letters. Check your syllabus and use the percentage as the reliable output.
Why use it
- Work out what you need on a final exam to reach a target grade.
- Combine assignments, tests and a project with different weights.
- Translate a raw mark into a percentage without arithmetic mistakes.
How to use it
- 1Enter your total percentage to see the letter band.
- 2Add each assessment with its score, maximum and weight.
- 3Check that the weights total 100.
- 4Read the weighted percentage and letter band.
Worked examples
Weighted course
Input
Assignments 30%, midterm 30%, project 40%
Output
A single weighted percentage using each item's own maximum.
Raw mark
Input
74 out of 80
Output
92.5 percent and the matching letter band.
Common mistakes
- Adding percentages when the weights differ.
- Forgetting that a score of 74/80 is 92.5%, not 74%.
- Assuming the letter bands match your institution's.
Frequently asked questions
What if my weights do not total 100?
The tool warns you. Some courses use extra credit or drop the lowest item, so adjust the weights to match the syllabus.
Can I use it for a target grade?
Yes. Leave the final exam score blank in your own calculation and solve for the score needed, or adjust the score until the total reaches your target.
Are the letter bands official?
No. They are a common reference. Your institution's cutoffs may differ.
Is anything uploaded?
No. All calculations are local.