Weighted Grade Calculator
Calculate a student's final grade from weighted categories such as tests, homework, quizzes and projects. Add each category's score and weight to get the overall percentage and letter grade.
| Category | Score % | Weight % |
|---|
How weighted grades work
Most courses do not weigh every assignment equally — a final exam usually matters far more than a single homework. A weighted grade multiplies each category's average by its weight, adds them together, and divides by the total weight. This grade calculator does that instantly so you can report an accurate final mark without spreadsheet formulas.
How to use it
Add a row for each grading category — tests, homework, quizzes, projects — and enter the student's average score in that category along with the weight it carries in the course. The tool keeps a running total of your weights so you can confirm they add up to 100%, and shows both the final percentage and the corresponding letter grade.
Tips for fair weighting
Decide your category weights at the start of the term and share them with students so expectations are clear. If your weights do not total 100%, the calculator still returns a correct weighted average across whatever you entered, but a clean 100% split is easiest to explain. For a quick single-assignment score, try our Easy Grader instead.
Frequently Asked Questions
How do you calculate a weighted grade?
Multiply each category's average by its weight, add those results together, then divide by the total of the weights. The calculator handles this automatically as you type.
Do my category weights have to add up to 100%?
It is cleanest if they do, but the tool divides by your actual total weight, so it still returns a correct weighted average even if they do not.
Can I change how letter grades are assigned?
The calculator uses a common percentage-to-letter scale. If your school uses a different scale, read the percentage and apply your own cutoffs.
Is this grade calculator free?
Yes. It is completely free, requires no signup and runs entirely in your browser.