Weighted Grade Calculator
Most college and high school courses use category-based weighted grading, where different types of work count for different percentages of the final grade. This weighted grade calculator lets you enter up to six grade categories, such as Homework, Quizzes, Midterm, Final, Lab, and Projects, along with the weight each category carries and your average score in that category. The calculator multiplies each score by its weight, sums the results, and divides by the total weight to produce your overall course grade percentage and letter grade. The tool also shows you a breakdown of how many points each category contributes, making it easy to see which areas have the biggest impact on your grade. Weights should ideally sum to 100 to match your syllabus, but the calculator handles any total and normalizes accordingly. You can add or remove categories as needed. This is a planning tool; your official grade is set by your institution and course instructor.
Overall weighted grade: --% (--)
How weighted category grades work
Overall % = Sum(category score % x category weight) / Sum(weights)
Worked example
Homework 20% weight, avg 88%: contribution = 88 x 0.20 = 17.60.
Quizzes 15% weight, avg 82%: contribution = 82 x 0.15 = 12.30.
Midterm 25% weight, avg 76%: contribution = 76 x 0.25 = 19.00.
Final 40% weight, avg 83%: contribution = 83 x 0.40 = 33.20.
Overall = 17.60 + 12.30 + 19.00 + 33.20 = 82.10% (B)
Frequently asked questions
What is a weighted grade?
A weighted grade is a course grade where different assignment categories (such as homework, quizzes, tests, and a final exam) contribute different percentages toward the overall grade. For example, homework may count 20%, tests 50%, and the final exam 30%. Your score in each category is multiplied by its weight, and the results are summed to give the overall course grade.
Do my category weights need to add up to 100%?
In a properly structured syllabus, category weights should sum to 100%. This calculator will warn you if your weights do not sum to 100 and will normalize the result based on the total weight you have entered. If you are still adding categories mid-semester, enter only completed categories and the result will reflect your grade on work done so far.
How is a category average calculated?
A category average is typically the mean of all scores in that category. For example, if you scored 80, 90, and 70 on three homework assignments, the homework category average is (80 + 90 + 70) / 3 = 80. Enter this average in the score field for that category.
What if a category is not yet graded?
Simply leave that category out or set its weight to 0. The calculator will compute your grade based on the categories you have entered. This lets you project your standing partway through the semester.
My syllabus shows different categories than this calculator. Can I still use it?
Yes. The category names are just labels. You can rename each row to match your syllabus: Participation, Lab, Project, Attendance, or any other category your instructor uses. The math is the same regardless of category names.
Sources
- US Department of Education: Satisfactory Academic Progress.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026.