Weighted Grade Calculator by Category
Enter syllabus categories with their weights. Add scores for each category, and watch your weighted course average update live. Drop the lowest scores in any category, and set a target to see if it's within reach.
How Weighted Grading Works
Why Your Weights Might Not Add Up to 100%
If you haven't received grades in every category yet, the weights in your calculation will sum to less than 100%. The calculator re-normalizes the weights of only the categories that have scores.
Example: If your syllabus says Homework 20%, Quizzes 15%, Midterm 35%, Final 30%, but you've only entered scores for Homework and Quizzes, those two categories' weights are temporarily treated as 20/(20+15) and 15/(20+15)—or about 57% and 43%. Once you add Midterm and Final scores, the true weights activate.
This is standard practice: you're graded only on work that has been completed and submitted.
Drop-the-Lowest Policies and How They Change the Math
Many syllabi allow you to drop your lowest score in a category—useful if you had a bad day on a quiz or turned in a rushed assignment.
When you set "Drop lowest: 2" on Quizzes, the calculator sorts your quiz scores from high to low, removes the bottom 2, then averages the rest. That new average is what gets weighted into your course grade.
Edge case: If you have 2 quiz scores and drop-lowest is set to 2, the calculator ignores the drop command and warns you. It needs at least one score left to compute an average.
Frequently Asked Questions
Why doesn't my weighted grade add up to 100% even when my weights do?
Your course grade is calculated only from the categories where you have scores. If your syllabus lists 4 categories but you've only submitted work in 2 of them, those 2 categories are re-weighted to sum to 100% for the purposes of your current grade.
If I drop 1 quiz out of 3, will my homework grades still count?
Yes. Dropping the lowest quiz affects only the quiz average. Your homework, midterm, and other categories are unaffected and weighted exactly as your syllabus specifies.
Can I use this if my school uses a different grading scale (A=95, B=85, etc.)?
This tool uses the standard US scale: A = 90–100, B = 80–89, C = 70–79, D = 60–69, F = 0–59. If your institution uses a different scale, enter your grades in percentages, then convert the final result using your school's table.
What if a category has 0% weight?
A category with zero weight and scores will not affect your course grade, but will still appear in the breakdown. If a category has 0% weight and no scores, it's excluded entirely.
How does the "target grade" feature work?
Set your target grade (e.g., 80% to finish with a B), and the calculator shows the average you need on remaining ungraded work. If your current average is 75% and you have 40% of the course left to grade, you'd need roughly 88% on the remaining work to reach 80% overall. If it's impossible even with 100% on everything left, the verdict shows in red.
Does this tool save my data?
Yes. Everything you enter is stored in your browser's local storage (nothing is uploaded). Close the tab and come back tomorrow—your categories, scores, and settings will still be there. Clear your browser data and they'll be erased.