Weighted Grade Calculator
Calculate weighted average grade from score and weight lists.
This weighted grade calculator finds an overall course grade from multiple graded components (like homework, tests, and a final exam) that each count for a different percentage of the final grade, rather than being averaged equally.
Enter each component's score and weight, and the calculator returns your overall weighted grade.
Worked Calculation Examples
| Scenario | Result | Calculation Step |
|---|---|---|
| Homework, tests, and final exam | Weighted grade: 82.9% | (88 x 0.20) + (76 x 0.50) + (91 x 0.30) = 17.6 + 38 + 27.3 = 82.9%. |
| Quizzes, midterm, project, and final | Weighted grade: 84.35% | (95 x 0.15) + (82 x 0.35) + (90 x 0.20) + (78 x 0.30) = 14.25 + 28.7 + 18 + 23.4 = 84.35%. |
The Weighted Average Formula
Weighted grade = sum of (each score x its weight) / sum of all weights. If homework is 20% of the grade, tests are 50%, and the final exam is 30%, each component's score is multiplied by its weight before summing, rather than simply averaging the three raw scores together with equal importance.
Why Weighted Grades Differ from Simple Averages
A simple average treats every component equally, while a weighted average reflects the course's actual grading structure - a student who does poorly on a low-weight component (like homework) but well on a high-weight component (like the final exam) will have a higher weighted grade than a simple average would suggest.
How to Use the Weighted Grade Calculator
- Open the Weighted Grade Calculator and enter the values requested in the input fields.
- Check the units, percentages, dates, or time periods before reading the answer.
- Review the instant result and adjust any value to compare another scenario.
- Use the formula, example, and FAQs below to understand how the weighted grade calculator works.
Frequently Asked Questions
How do you calculate a weighted grade?
Multiply each grade component's score by its weight (as a decimal), sum those results, then divide by the sum of all the weights to find the overall weighted average.
Why is a weighted grade different from a simple average?
A weighted grade accounts for the fact that some components (like a final exam) count more toward the overall grade than others (like homework), while a simple average treats every component as equally important.
Do all the weights need to add up to 100%?
Ideally yes, for the weights to directly represent percentages of the final grade, though the formula still works mathematically even if the weights don't sum exactly to 100%, since it divides by the total weight regardless.
How do I use this weighted grade calculator?
Enter the known values, review the units or settings, and the calculator updates the result instantly. The formula and example on this page show how the answer is produced.
What does the Weighted Grade Calculator calculate?
Calculate weighted average grade from score and weight lists. It is designed for fast browser-based calculations without sign-up, downloads, or manual spreadsheet setup.
What formula does this weighted grade use?
The formula is: weighted grade = sum(score * weight) / sum(weights). Weighted averages are a specific application of the broader statistical concept of a weighted mean, used whenever some data points should count more than others - in grading, this reflects a syllabus's stated policy that, say, exams matter more toward the final grade than homework, a structure instructors have used since at least the early 20th century as course grading became more standardized.
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Last updated: September 27, 2026.