Weighted Grade Calculator
Calculate your final course grade using weighted categories. See your current grade and find out what you need on remaining work.
Most courses weight different components differently — your final exam might count for 40% while homework only counts for 20%. A simple average would give you the wrong answer. This weighted grade calculator accounts for each category's importance and tells you exactly where you stand, plus what you need on remaining work to hit your target grade.
Total weight: 100% ✓
Leave the score blank for categories not yet graded — your current grade is calculated from completed work only.
How to Use the Weighted Grade Calculator
- 1Enter your grade categories (e.g. Homework, Midterm, Final Exam) and their weights. Weights should add up to 100%.
- 2Enter your score and the maximum possible score for each completed category. Leave the score blank for categories not yet graded.
- 3Click "Calculate Grade" to see your current weighted grade and letter grade.
- 4Optionally, enter a target final grade and click "Calculate" to see what you need on remaining work.
Worked Example: Calculating a Weighted Grade
Say your syllabus splits the grade into Homework (20%), Quizzes (15%), Midterm Exam (25%), and Final Exam (40%) — the same default weights this calculator starts with. Homework, quizzes, and the midterm are graded; the final hasn't happened yet.
| Category | Weight | Score | Weighted Contribution |
|---|---|---|---|
| Homework | 20% | 90/100 | 90 × 0.20 = 18.00 |
| Quizzes | 15% | 85/100 | 85 × 0.15 = 12.75 |
| Midterm Exam | 25% | 78/100 | 78 × 0.25 = 19.50 |
| Final Exam | 40% | not graded yet | — |
The three graded categories sum to 18.00 + 12.75 + 19.50 = 50.25, and together they represent 60% of the course (20 + 15 + 25). Dividing 50.25 by that completed weight (0.60) rescales it back to a 100-point scale: 50.25 ÷ 0.60 = 83.75% (a B). That rescaling step is what lets the calculator show an accurate current grade even before every category is graded — it never treats missing work as a zero.
Worked Example: What Score Do I Need on the Final?
Using the same 83.75% current grade above, suppose you want to finish the course with a 90%. Only the Final Exam (40% weight) is left. The calculator solves: Needed = (Target − Completed Weighted Sum) ÷ (Remaining Weight ÷ 100) = (90 − 50.25) ÷ 0.40 = 39.75 ÷ 0.40 = 99.38%. That's a near-perfect score needed on a single exam to move the overall grade from 83.75% up to 90% — a good illustration of why heavily-weighted final exams can make late-semester grade recovery extremely difficult, or in some cases mathematically impossible if the required score exceeds 100%.
Common Mistake: Weights That Don’t Match Your Syllabus
This calculator trusts whatever weights you type in — it doesn't know your actual syllabus. If your weights sum to 95% instead of 100% (a forgotten participation category, a typo on the final's weight), the tool still normalizes your grade as if those categories represent the whole course, which can produce a result that doesn't match what your professor's gradebook shows. Also watch for "drop the lowest score" policies: if your syllabus drops your lowest quiz grade, you need to exclude that quiz manually — the calculator has no way to know which score to discard. Always double-check your weights add up to 100% (the tool flags this for you) and cross-reference against your syllabus before treating the result as final.
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Frequently Asked Questions
What is a weighted grade calculator?
A weighted grade calculator computes your final course grade based on the relative importance (weight) of each assignment category. For example, if homework counts for 20%, quizzes 15%, midterm 25%, and final exam 40%, your grade is not a simple average — each category contributes proportionally to its weight.
How do I calculate my weighted grade?
For each category, divide your score by the maximum possible score to get a percentage, then multiply by the category weight. Sum these weighted scores across all completed categories. Divide by the total completed weight to get your current grade. Our calculator handles all of this automatically.
Do my weights need to add up to 100%?
Yes — your weights should total 100% for the result to be accurate. The calculator shows a running weight total with a green check when you reach exactly 100%. If some categories are not yet graded, leave the score blank and the calculator will compute your grade based only on completed work.
What does "leave score blank" mean?
If a category has not been graded yet — for example your final exam is still upcoming — leave the score field empty. The calculator will compute your current grade from only the categories you have entered scores for, and tell you how much of your total grade that represents.
How do I find out what I need on my final exam?
After calculating your current grade, enter your target final grade in the "What do I need on remaining work?" section and click Calculate. The tool will tell you what average score you need across all remaining (unscored) categories to hit your target.
Can I add custom categories?
Yes — click "+ Add category" to add any category your course uses, such as labs, participation, projects, or extra credit. Name it anything you like and set its weight.