Calculate a course grade from weighted categories such as homework, quizzes, tests, projects, and finals.
If homework is 95% at 20%, quizzes are 88% at 20%, tests are 84% at 40%, and the final is 90% at 20%, the weighted grade is 88.2%.
How to use the weighted grade calculator
Use this calculator when your course grade is split into categories, such as homework, quizzes, tests, labs, projects, participation, midterm, or final exam. Enter each category score as a percent, then enter that category’s weight from your syllabus.
For example, if tests are worth 40% of the course, enter your current test average in the score field and 40 in the weight field. The calculator multiplies each score by its weight, adds the weighted points, and divides by the total assigned weight.
If you only know points earned and points possible for one category, first convert that category to a percent using Grade Calculator, then place that percent here.
Weighted Grade Calculator formula
Weighted grade = Σ(score × weight) ÷ Σ(weight). In plain language, multiply every category grade by its course weight, add those weighted values, then divide by the total weight used.
If the weights total exactly 100%, the calculation is simply the sum of all weighted category contributions. If the weights total less than 100%, the calculator normalizes the result over the weight you entered, which is useful for estimating the grade from completed categories only.
Weighted grade worked example
Suppose your syllabus says homework is 20%, quizzes are 20%, tests are 40%, and the final is 20%. Your category averages are 95, 88, 84, and 90.
Step-by-step calculation
- Homework: 95 × 20 = 1900 weighted points.
- Quizzes: 88 × 20 = 1760 weighted points.
- Tests: 84 × 40 = 3360 weighted points.
- Final: 90 × 20 = 1800 weighted points.
- Total weighted points: 8820.
- Total weight: 100.
- Weighted grade: 8820 ÷ 100 = 88.2%.
This is why a lower score in a heavily weighted test category can affect the course grade more than a lower score in a small homework category.
What if my weights do not add to 100%?
There are two common situations:
Only some categories are completed
If your final exam has not happened yet, you can leave it out and calculate the grade from completed categories only. The calculator divides by the total weight entered, so the result estimates your current performance across completed work.
Your syllabus uses extra credit or dropped categories
If the total weight is above or below 100 because of extra credit, dropped scores, or special grading rules, use the exact weights your teacher provides. If a category is dropped, remove that row or set its weight to 0.
The “Unassigned weight” metric helps you quickly see whether your entered categories total 100% or whether part of the course is still missing.
Weighted grade vs unweighted grade
An unweighted grade treats every score equally. A weighted grade gives more influence to categories that matter more in the syllabus. A 90% homework average and a 70% exam average do not balance evenly if exams are worth much more than homework.
Common weighted grade mistakes
Using points instead of percentages
Category scores should usually be entered as percentages. If your homework category is 180 out of 200 points, enter 90 as the score, not 180.
Entering 0 for a missing future exam
If the final exam has not happened yet, do not enter 0 unless you want to model a zero. Leave the row out, set the weight to 0, or use the final grade calculator for target planning.
Mixing category weights with assignment weights
If tests are worth 40% and one test is worth 100 points, do not enter 100 as the test weight. Use the category weight from the syllabus.
Forgetting dropped lowest scores
If your teacher drops the lowest quiz or homework score, calculate the category average after the drop, then enter the adjusted category percent here.
Weighted Grade Calculator FAQs
Is this result official?
No. Use it for planning and compare it with your teacher, registrar, LMS, or school handbook. Official results may use rounding, late penalties, dropped scores, or special course policies.
Can I calculate my current grade before the final exam?
Yes. Enter only the completed categories, or set the future final exam weight to 0. The result estimates your current weighted average for the categories entered.
How do I include extra credit?
If extra credit is added to a category average, include it in that score. If extra credit is its own category, add it as a row with the weight or point rule your teacher uses.
Should category weights be entered as decimals or percentages?
Enter weights as percentages, such as 20 for 20%. Do not enter 0.20 unless your syllabus explicitly uses decimal weights and every other row is entered the same way.
Why does my LMS show a different grade?
Your LMS may use hidden rules such as category caps, dropped assignments, excused work, missing-work penalties, rounded category averages, or manually adjusted scores.
Can teachers use this calculator?
Yes. Teachers can use it to check syllabus scenarios, explain grade weighting to students, or test how changing category weights affects final course grades.
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Reviewer
This educational math content is reviewed under the SolverCalc reviewer rule by Prof. Dr. Khalil Mudassar. WordPress adds the author bio automatically, so this page does not include a duplicate author box.
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