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Weighted Grade Calculator
Combine category scores and weights, such as homework 20% and tests 40%, into your real course grade.
StudentsWeights total: 100% — matches a standard syllabus.
Weighted course grade on the US standard scale
Most course grades are not a simple average. Homework might count for 20%, quizzes 15%, tests 40% and the final project 25%, so a strong test average matters twice as much as homework. This calculator applies your syllabus weights to each category score and returns the weighted course grade as a percentage and a letter. A weights indicator shows whether your categories add up to 100%, the most common reason a hand calculation goes wrong.
How to use the Weighted Grade Calculator
- Add a row for each grading category in your syllabus.
- Enter your current average score in that category.
- Enter the category weight as a percentage.
- Check the weights total 100%, then read your weighted grade.
Formula
Weights can be entered as percentages (20, 40) or as parts (2, 4); the formula divides by the total weight either way, but the on-screen indicator expects percentages totalling 100.
Worked example
Homework 92% at weight 20, quizzes 85% at weight 15, tests 78% at weight 40 and a project 88% at weight 25. Weighted sum = (92 x 20) + (85 x 15) + (78 x 40) + (88 x 25) = 1840 + 1275 + 3120 + 2200 = 8435. Divide by 100 = 84.35%, a B. The simple average of the four scores would be 85.75%, which overstates the grade because the weakest category, tests, carries the most weight.
Good to know
Weighted grading explains a familiar frustration: working hard on low-weight tasks while the grade barely moves. Before the next unit, it is worth computing which category has the most room to improve per hour of study. Tests at 40% weight usually win that comparison easily. Also check whether your teacher weights by category or by points; in a points system a 200-point final outweighs homework automatically, with no percentage weights involved. This calculator is for the percentage-weight system described in most syllabi.
US grading scale reference
The table below is the US plus/minus scale used across this site. Where this tool offers other scales, the Canadian scale sets an A from 85% with a pass at 50%, and the Australian scale uses the bands HD (85%+), D (75-84%), C (65-74%), P (50-64%) and F (below 50%) on a 7.0 GPA.
| Letter grade | Percentage | GPA points |
|---|---|---|
| A+ | 97–100% | 4.0 |
| A | 93–96% | 4.0 |
| A- | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B- | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C- | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D- | 60–62% | 0.7 |
| F | 0–59% | 0.0 |
Frequently asked questions
How do I calculate a weighted grade?
Multiply each category score by its weight, add the products, and divide by the total weight. The example on this page works through a four-category course step by step.
What if my weights do not add up to 100%?
Either a category is missing, often the final exam, or one weight was copied wrong from the syllabus. The indicator on the calculator shows the current total so you can spot the gap.
Can I see the grade I need in one category?
Enter the scores you already have and leave the unknown category at the score you are considering. Then adjust it until the weighted grade reaches your target; the Final Grade Calculator does the same job for a single exam.
Do dropped lowest scores change the calculation?
Yes. If your teacher drops the lowest quiz, remove it from your quiz average before entering the category score here; the weight of the category itself does not change.
Is a weighted grade the same as GPA?
No. A weighted grade is a percentage for one course. GPA converts the final letter grades of all your courses into grade points and averages them by credit hours.
Go deeper
Prefer the full walkthrough? Read our guide: How to Calculate a Weighted Grade — it explains the method step by step with more worked examples.
Sources & further reading
- College Board BigFuture — How to Calculate Your GPA on a 4.0 Scale — The most widely cited US reference for letter-grade to 4.0-scale conversion.
- Khan Academy — free lessons and practice — Free study material for the subjects behind the grades.
Related tools
Last reviewed: November 2026. Results from this calculator are estimates based on the published scales above; your school's recorded grade is the official one.