Weighted Grade Calculator
Not all points are equal. Weight them properly.
A weighted grade multiplies each score by its weight, adds the products, and divides by total weight. Quizzes at 80 with 20 percent weight, a midterm at 90 with 30 percent, and homework at 95 with 30 percent give (1,600 + 2,700 + 2,850) / 80 = 89.4 percent. Weights do not need to sum to 100 because the division normalizes them.
Why weighting changes everything
A 100 on a 5 percent quiz and a 70 on a 40 percent exam do not average to 85. The exam dominates because its weight is eight times larger. Simple averages lie whenever weights differ.
This is why bombing a heavily weighted midterm hurts more than acing a light homework set helps. The math rewards you for aiming effort at the heavy categories.
Setting up the rows
Add one row per category or assignment: its score as a percent and its weight as a percent. Use the syllabus weights, not guesses.
If a category has multiple items, average them first, then enter the category average with the category weight. Or enter every item with its own share; both give the same answer.
Checking your work
Sanity-check the result: it must fall between your lowest and highest scores. If it does not, a weight is wrong.
Also check that the weights reflect reality. A syllabus that says exams are 50 percent means your exam scores drive half the grade no matter how many homework points exist.
Skip the arithmetic
Compute your weighted grade on the calculator.
Weighted grade questions
How do you calculate a weighted grade?
For each item, multiply score by weight, add all products, and divide by the sum of weights. Example: 80 at 20, 90 at 30, 95 at 30 gives 89.4 percent.
Do weights have to add up to 100?
No. Dividing by the total weight handles any sum, so partial weights work fine. Just keep every weight in the same units, all percents or all points.
What is the difference between weighted and unweighted grades?
A weighted grade multiplies each score by its importance before averaging, so heavy categories dominate. An unweighted grade is a straight average where every item counts the same.