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01
List your categories.
Homework, quizzes, labs, participation, projects, midterm exams, and the final exam each get their own row.
Free grade calculator · Add weighted categories
Weighted Grade Calculator for Course Grades
Use this weighted grade calculator to combine category grades, weights, and letter grade results in seconds. Add homework, quizzes, labs, projects, a midterm, and a final, then see your overall course grade instantly. If your weights don't add up to 100%, it warns you right away and can normalize them in one tap.
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Your weighted grade, in one line.
For Homework 92% (20%), Midterm 85% (30%), and Final 88% (50%): (92×20 + 85×30 + 88×50) ÷ 100 = 87.9%, which is a B+ on a common US letter grade scale.
A weighted grade multiplies each category's grade by how much it counts. Then it adds those results and divides by the total weight. When your weights total 100%, the formula is simply the sum of grade × weight ÷ 100.
How to use the calculator.
Add one row for each grading category in your syllabus. Type the grade you have in that category, enter the category weight, and read your overall grade.
02
Enter the weights.
Use the percentages from your syllabus. For example, homework might count 20%, exams might count 50%, and projects might count 30%.
03
Read the average grade.
The big result is your weighted course grade and letter grade. It updates as soon as you change a grade or a weight. Tap Normalize when your weights don't sum to 100%.
Weighted vs unweighted grades.
The difference is whether every item counts the same. An unweighted average treats each score equally. A weighted average lets important categories count more.
| Category | Grade | Weight | Contribution |
|---|---|---|---|
| Homework | 92% | 20% | 18.4 pts |
| Midterm | 85% | 30% | 25.5 pts |
| Final | 88% | 50% | 44.0 pts |
| Total | — | 100% | 87.9% |
An unweighted average of 92, 85, and 88 is 88.3%. The weighted result is 87.9% because the lower-scoring midterm and final carry more weight than the homework. The gap is small in this example, but a 50%-weighted final can move your grade by a full letter.
Most high school and college courses use weighted grading because major exams and projects usually matter more than one homework assignment. That's why a grade calculator based on weighted averages gives a more realistic answer than a simple average.
The formula, worked out.
Two sums and one division are the entire calculation.
- Weighted average = Σ(grade × weight) ÷ Σ(weight). The bottom sum is why it still works when weights don't total 100%.
- Contribution of one category = grade × weight ÷ 100. Homework at 92% with a 20% weight contributes 18.4 points toward your course grade.
- Normalize scales each weight by 100 ÷ (current total). If your entered weights add to 80%, each weight is multiplied by 1.25 so the new total becomes 100%.
- Letter grade uses a standard US scale: 93+ A, 90+ A-, 87+ B+, 83+ B, 80+ B-, and so on. Always check your instructor's grading scale if your class uses a different cutoff.
Dividing by the total weight keeps the answer honest. If you've only entered three of five categories, the average reflects just those three at their real proportions instead of quietly assuming the missing work is worth zero.
Example weighted grade calculation.
Say your syllabus has homework worth 20%, quizzes worth 10%, a project worth 20%, a midterm worth 20%, and a final exam grade worth 30%.
If your scores are 94, 88, 91, 84, and 90, the calculation is: (94×20 + 88×10 + 91×20 + 84×20 + 90×30) ÷ 100. The result is 89.6%, which is close to an A- on many grading scales.
This example shows why weights matter. Raising the final exam grade by five points changes the overall grade more than raising a small quiz category by five points.
When to use a weighted grade calculator.
Use it whenever your syllabus assigns different weights to categories. It helps you see your current standing, plan for a target grade, and understand which category moves your average grade the most.
It's also useful before a big test. You can enter a possible final exam grade and see how a strong or weak score would change your overall course grade.
Students can also use it during the semester when only part of the course has been graded. Enter the categories you know, leave out categories with no score yet, and update the calculator as new grades post.
Tips for accurate weighted grades.
Use the weights from your syllabus, not a guess. Confirm each category's percentage and make sure it reflects the current term.
Enter grades as percentages, not raw points, unless every category uses the same point scale. Percentages keep homework, tests, and projects comparable.
Update the calculator often. Your weighted average becomes more accurate as more work is graded.
Don't mix extra credit into a category unless your teacher explains how it's counted. Extra credit rules can change the final result.
If your school uses its own letter grade chart, compare the percentage result with that chart instead of relying only on the default scale.
Why weights may not total 100% yet.
Sometimes a syllabus lists only the work completed so far. Other times, you may not know every category at the start of the course.
A weighted grade calculator can still help because it divides by the total of the weights you entered. The average reflects what you've graded so far at its real proportions.
Weighted grade — FAQ.
How do I calculate my weighted grade?
Multiply each category's grade by its weight, add the results, then divide by the total weight. For Homework 92% (20%), Midterm 85% (30%), and Final 88% (50%): (92×20 + 85×30 + 88×50) ÷ 100 = 87.9%.
What if my weights do not add up to 100%?
The calculator still works, because it divides by the total of the weights you entered, so the average is correct. It also warns you that the weights do not total 100% and offers a one-tap Normalize button to scale them to 100% while keeping their proportions.
What is the difference between weighted and unweighted grades?
An unweighted grade is a simple average where every item counts equally. A weighted grade lets some categories count more. A final worth 50% moves your grade far more than homework worth 10%.
Can I add or remove categories?
Yes. Add a row for every category you have and remove any you don't need. The weighted average and the weight total update instantly as you edit.
Can I use this for high school classes?
Yes. The calculator works for high school, college, and any course that uses category weights. Just enter the percentages from your syllabus.
Can I share my gradebook?
Yes. The page keeps your whole gradebook in the URL, so you can bookmark it or send the link, and the calculator reopens with the same categories, grades, and weights.
Does this calculator store my grades?
No. Every calculation runs in your browser. Nothing is uploaded, saved, or sent to a server.
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