Calculate your overall course grade from weighted categories like homework, quizzes, and exams. Free online weighted grade calculator with letter grade conversion.
A grade calculator lets you instantly compute your overall course grade by combining multiple weighted categories — homework, quizzes, exams, projects, and participation — into a single weighted average and letter grade. Simply enter each category's name, its weight as a percentage of your final grade, and the score you received (or expect to receive), and the calculator instantly returns your overall percentage and corresponding letter grade.
Most courses don't grade everything equally: a final exam might count for 40% of your grade while weekly homework only counts for 10%, even if you have far more homework assignments than exams. A simple average of all your scores would misrepresent your true standing, which is why weighted grade calculations are the standard used by nearly every school and university.
This calculator is useful for students tracking their progress throughout a semester, for checking your grade before it's officially posted, or for planning how much you need to improve in a category to reach a target overall grade.
A student has three grading categories: Homework (40% weight, 90% score), Quizzes (30% weight, 85% score), and Exams (30% weight, 80% score). The weighted overall grade is (40×90 + 30×85 + 30×80) / 100 = 85.5%, which corresponds to a letter grade of B.
Your overall grade percentage represents the weighted combination of every category you entered — it directly reflects how your instructor's syllabus values each type of assessment, not a simple average of your scores. If your total weight doesn't equal 100%, treat the result cautiously: the calculator still computes a mathematically valid weighted average, but it may not match what your school's grading system will actually report, since it assumes the weights you entered represent the complete grading scheme. Use the letter grade scale reference table to see exactly which percentage boundaries define each grade at your institution — note that some schools use slightly different cutoffs, so always confirm against your syllabus or student handbook if the exact boundary matters to you.
Enter each grading category (e.g. Homework, Quizzes, Exams) with its weight and your score. Weights should add up to 100% for an accurate overall grade.
| Letter Grade | Percent 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 | 0–59% |