Weighted Grade Calculator
Updated on November 6, 2026
Your class grade, worked out the way your teacher’s gradebook does it.
Most classes don’t count every assignment the same. Tests might be worth 45% of the grade and homework 20%. Enter each category with its grade and weight, and this weighted grade calculator shows your current grade, the math behind it, and which category is costing you the most points.
Free · No sign-up · Works with percentages or points like 42/50 · Shows every step
Type a percent like 92 or points like 46/50. Weights are in your syllabus, often in a grading breakdown table.
How we got this
Tests are where most math grades are won or lost.
If your child understands the homework but freezes on tests, a Brighterly math tutor can work on the exact topics coming up next.
How to calculate your grade in a class with weights
This grade calculator with weights needs two things for each category: your grade and how much the category counts. Both are on your syllabus and in your school portal.
- Add your categories. Use the names from your syllabus, such as Homework, Quizzes, Tests and Projects. Tap + Add category for each extra one.
- Enter your grade in each category. Type a percentage like 92, or the points straight from your gradebook, like 42/50. The calculator converts points to a percentage for you.
- Enter each weight. This is the share of the class grade the category is worth, such as 20% for homework. Leave out categories with no grades yet, like a final that hasn’t happened.
- Read your grade. The green box shows your current class grade as a percentage and a letter. If your weights add up to less than 100%, it tells you how much of the grade is still ahead.
- Find your weakest category. The Where you’re losing points table ranks each category by how many points it costs you, so you know where extra study pays off most.
- Plan for the final. Tap What do I need on my final? to open the final grade calculator with your grade and the remaining weight filled in.
Weighted grade example: homework, quizzes and tests
Here’s a typical syllabus before the final: homework 20%, quizzes 20%, tests 40%, final exam 20%. The student’s gradebook shows:
|
Category |
Grade |
Weight |
Grade × weight |
|---|---|---|---|
|
Homework |
92% |
20% |
1,840 |
|
Quizzes |
38/50 = 76% |
20% |
1,520 |
|
Tests |
83.5% |
40% |
3,340 |
|
Total |
— |
80% |
6,700 |
The final hasn’t happened, so only 80% of the grade has scores. Divide the total by 80, not 100: 6,700 ÷ 80 = 83.75%, a B.
If you divided by 100 instead, you’d get 67%, a D. That’s the most common mistake when people calculate weighted grades by hand, and it makes a B student look like they’re failing.
Now look at points lost. Tests carry half of the graded weight, so their 16.5-point gap costs 8.25 points. Quizzes cost 6 points and homework only 2. Raising the test average to 88.5% would lift the grade to 86.25%, while a perfect homework score would add just 2 points.
How to calculate weighted grades: the formula
A weighted grade multiplies each category grade by its weight, adds the results, and divides by the total weight of the categories you’ve entered.
Weighted grade = (g₁ × w₁ + g₂ × w₂ + … + gₙ × wₙ) ÷ (w₁ + w₂ + … + wₙ)
|
Symbol |
Meaning |
Example |
|---|---|---|
|
g |
Grade in a category, in % |
92 |
|
w |
That category’s weight, in % |
20 |
|
n |
Number of categories |
3 |
When the weights add up to 100, the bottom of the fraction is 100 and the formula becomes a plain sum of grade × weight ÷ 100. When they add up to less, dividing by the real total gives your grade so far, which is how school gradebooks show it during the term.
What is a weighted grade?
A weighted grade is a class grade where some work counts more than other work. If tests are weighted 40% and homework 20%, one point on your test average moves your grade twice as much as one point on your homework average.
Weighted grade vs simple average
A simple average treats every category the same. With 92, 76 and 83.5, the simple average is 83.8%, close to the weighted result here only by chance. If tests were the 76 and quizzes the 83.5, the simple average would stay the same, but the weighted grade would drop to 81.9%.
Points inside a category
If a category has several assignments, the calculator expects the category average from your gradebook. Most gradebooks add up points in a category, so a 18/20 test and a 40/50 test give 58/70 = 82.9%, not the average of 90% and 80%. Use the total points if you’re working it out yourself.
How we find where you’re losing points
For each category, the calculator takes the gap to 100% and multiplies it by the category’s share of the graded weight:
Points lost = (100 − g) × w ÷ (w₁ + w₂ + … + wₙ)
The points lost across all categories always add up to 100 minus your grade. In the example: 8.25 + 6 + 2 = 16.25, and 100 − 83.75 = 16.25.
Примітка для розробки: порожні категорії (без оцінки) виключаються з чисельника і знаменника, як у Canvas і PowerSchool. Округлення результату — до 2 знаків, без округлення вгору.
Special cases
Points-based classes
Some teachers don’t use weights at all: every assignment is worth points, and your grade is total points earned ÷ total points possible. In that case, each assignment’s weight is just its share of the points. Enter one row per assignment with its points (like 42/50) and set every weight to its points possible, or simply add up all your points and divide.
Weights that don’t add up to 100%
If they add up to less, the missing part is usually work that hasn’t been graded yet, such as the final. Your grade is still accurate for now, and the calculator tells you how much is left. If they add up to more than 100%, there’s probably a typo; the calculator scales them to 100% and asks you to check.
Categories with no grades yet
Leave them out. Canvas, PowerSchool and most other gradebooks skip empty categories and spread their weight over the rest, which is why a grade can jump after the first test of the term.
Extra credit
Add extra credit points to the points you earned, not to the points possible. A category can go above 100%, and the calculator keeps it that way.
Dropped lowest scores
If your teacher drops the lowest quiz, remove that quiz before you work out the category average, then enter the new average.
Matching your school portal (Canvas, PowerSchool)
Copy each category’s percentage and weight from your portal’s grades page. Canvas shows weights under the grades table when assignment groups are weighted; PowerSchool usually lists them in the class syllabus. If the result is a little different from the portal, check for rounding, dropped scores or a category your teacher hides.
For parents: reading the “Where you’re losing points” table
A single class grade hides where the problem is. The points-lost table splits it up, so you and your child can agree on one thing to fix first.
- The top row is the priority. It’s the category that costs the most points, usually because it carries the most weight. In the example, tests cost 8.25 points while homework costs 2.
- Low grade, low weight is rarely urgent. A 70% in a 5% participation category costs only 1.5 points. Praise the effort, but don’t spend the week on it.
- High weight, small gap is still worth it. Moving a 40% test category up 5 points adds 2.5 points to the class grade, often enough to cross into the next letter.
- Check the portal together once a week. Enter the new category grades and watch whether the top row is shrinking. It’s a calmer conversation than “why is your grade a C?”
Tests are where most math grades are won or lost. If your child understands the homework but freezes on tests, a Brighterly math tutor can work on the exact topics coming up next. Book a free lesson.
Weighted grade calculator FAQ
How do I calculate weighted grades?
Multiply each category grade by its weight, add the results, and divide by the total of the weights. With homework 92% (20%), quizzes 76% (20%) and tests 83.5% (40%), that’s 6,700 ÷ 80 = 83.75%.
What is a weighted grade?
It’s a class grade where categories count differently. A test category weighted 40% affects your grade twice as much as a homework category weighted 20%.
What does weight mean in grades?
The weight is the share of the final class grade a category is worth. Your syllabus lists it, for example “Tests 40%”. All the weights in a class add up to 100%.
How do I calculate my grade in a class?
If your class uses weights, use the weighted formula above or the calculator. If it uses points, divide the total points you’ve earned by the total points possible and multiply by 100.
How do I calculate my grade average?
For a simple average, add your grades and divide by how many there are. For a class grade, use a weighted average instead, because most classes don’t count every category equally.
Why does my grade look so low when I calculate it myself?
You probably divided by 100 while some categories have no grades yet. Divide by the total weight you’ve entered instead. With 80% of the grade done, a 6,700 total is 83.75%, not 67%.
Can I enter points instead of percentages?
Yes. Type points like 42/50 and the calculator turns them into 84%.
Does this match Canvas and PowerSchool?
It uses the same method: weighted categories, with empty categories left out. Small differences usually come from rounding, dropped scores or extra credit.
What’s the fastest way to raise a weighted grade?
Improve the category with the most points lost, which is usually tests. If those are math tests and the gaps go back to earlier topics, an online math tutor can target them before the next exam.
What do I need on my final?
Tap What do I need on my final? under your result. It opens the final grade calculator with your current grade and the final’s weight already filled in.
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