Weighted Grade Calculator
Updated by Grade Calculator Plus
Homework 20%, Quizzes 30%, Exams 50%: the weighted grade calculator combines categories like these from your syllabus into one course grade. Enter each category's percentage and weight, or add its assignments one by one if you don't have the category average.
Enter a grade and weight for each category.
How to calculate a weighted grade
- Multiply each category's percentage by its weight.
- Add the results together.
- Divide by the total of the weights.
With weights that add up to 100, the last step is dividing by 100. Calculating grades by weight means a category worth 50% moves your course grade five times as much as one worth 10%.
When your weights don't add up to 100%
The calculator normalizes the weights you enter: it divides by their total, so weights that add up to 90% or 110% still give your grade. If they add up to 90%, Grade Calculator Plus scales each one by 100/90 and says so on the result. An empty category works differently: the result is then your average across the categories you filled in, and the missing ones can still change your final course grade.
Three categories at 30% each, with grades of 90, 80 and 70, total 90%. After scaling, the course grade is 80%, a B-.
Categories with no grades yet
A category you haven't been graded in yet, like a final that's still ahead, can stay empty. It's left out, and the result reads like "Your grade across categories making up 40% of the course is 90% (A-)." That's your grade so far, not your course grade: the other categories count once they have grades. To see what the missing part needs, find the score you need on the final.
Weighted grade calculator vs a plain average
A plain average counts every category the same; a weighted grade calculator follows your syllabus. With grades of 92, 88 and 70 in categories weighted 20, 30 and 50, the plain average is 83.33% but the weighted grade is 79.8%, because the category you scored lowest in counts the most.
To weight single assignments instead of categories, use the grade calculator, where each row takes its own weight.
Example
Homework is 20% of the grade and you have 95%, quizzes are 30% at 85%, and the exam is 50% at 78%.
95 × 20 = 1,900, 85 × 30 = 2,550 and 78 × 50 = 3,900. The total is 8,350, and divided by 100 that gives 83.5%, a B. Homework adds 19 points to your course grade, quizzes 25.5 and the exam 39.
Frequently asked questions
How do I calculate weighted grades?
Multiply each category's grade by its weight, add the results and divide by the total weight. With Homework 20% at 95, Quizzes 30% at 85 and Exams 50% at 78, that's (1,900 + 2,550 + 3,900) ÷ 100 = 83.5%. The weighted grade calculator above does the same with your own categories.
What if my category weights don't add up to 100%?
The calculator divides by the weights you entered, which scales each one in proportion as if they added up to 100. It shows a notice when it does this. If the total looks wrong, check the syllabus for a category you might have missed before trusting the result.
Can I enter each assignment instead of a category average?
Yes. Choose "Calculate this category from assignments" on a category, then enter each assignment as a percentage or as points earned out of points possible. The calculator works out the category's percentage from those scores and weights it like any other category. Use this when your gradebook lists scores but no category average.
How much will one test raise my grade?
Multiply the change in that category by its weight. If tests are 50% of your grade and a good test lifts your test average by 4 points, your course grade rises by 2 points. Enter the new average in the calculator to see the exact figure and letter grade.