Your syllabus tells you that homework is worth 20% and the final is worth 40%. It does not tell you what grade you actually have right now. Enter your categories below and this weighted grade calculator will — along with the average you need on everything still ungraded.
Calculate your weighted grade
Combine category grades using the weights from your syllabus.
Result
Add a grade and a weight to see your weighted grade.
How this calculator works
In a weighted course, each category (homework, quizzes, exams…) counts for a set share of the final grade. Multiply each category grade by its weight, add them up, and divide by the total weight.
Weighted grade = Σ(grade × weight) ÷ Σ(weight)
Example: homework 94% × 20, quizzes 86% × 15 and midterm 84% × 25 give (1880 + 1290 + 2100) ÷ 60 = 87.83% so far. If those weights are percentages of the course, 40% is still ungraded.
Weights can be percentages of the course or relative points (for example 1, 2, 3). If percentage weights add up to less than 100%, the result is your grade so far, and you can enter a target to see the average you need on the remaining work: needed = (target × 100 − Σ(grade × weight)) ÷ remaining weight.
Grading scale used by default
United States — letter grades with +/−. The most common US high school and college scale. Many schools use it, but cut-offs vary — always check your syllabus.
| Grade | Percentage |
|---|---|
| A+ | 97% and above |
| A | 93% – 96.99% |
| A− | 90% – 92.99% |
| B+ | 87% – 89.99% |
| B | 83% – 86.99% |
| B− | 80% – 82.99% |
| C+ | 77% – 79.99% |
| C | 73% – 76.99% |
| C− | 70% – 72.99% |
| D+ | 67% – 69.99% |
| D | 63% – 66.99% |
| D− | 60% – 62.99% |
| F | 0% – 59.99% |
Grading scales differ between countries, schools and even individual courses. Use the grading scale button in the calculator to switch to a US, UK, Canadian or Australian scale, or to enter your own cut-offs.
How to use this(Weighted Grade) calculator?
Each row is one category from your syllabus — homework, quizzes, labs, the midterm, the final.
- Category (optional) — name it so the result is readable. “Homework,” “Midterm,” “Final.”
- Grade (%) — your average in that category. You can type a percentage like
88, or points like44/50and it will convert for you. - Weight — how much that category is worth. Use
20for 20%. - Adds — this column fills in automatically. It shows how many points that category contributes to your final course grade, which is usually the most revealing number on the screen.
Open “What average do I need on the remaining work?” and enter a target to find out what the ungraded portion of your course has to average.
You do not need every category filled in. Enter what has been graded so far and the calculator works with that.
How weighted grades actually work?
In a weighted course, not all points are equal. A perfect score on a homework assignment worth 10% of your grade moves you less than a mediocre score on a final worth 40%. That is the entire idea, and it is why the average of your scores is almost never your grade.
The formula
Weighted grade = Σ (score × weight) ÷ Σ (weights)
Multiply each category score by its weight, add those products together, then divide by the total of the weights. That last division is the step most people skip, and it is what makes the formula work even when your weights do not add up to 100%.
A worked example
A course with these weights:
| Category | Weight | Your average |
|---|---|---|
| Homework | 20% | 92% |
| Quizzes | 15% | 85% |
| Midterm | 25% | 78% |
| Final exam | 40% | not taken yet |
Step 1 — multiply each score by its weight
Homework: 92 × 0.20 = 18.40
Quizzes: 85 × 0.15 = 12.75
Midterm: 78 × 0.25 = 19.50
──────
50.65 points banked
Those 50.65 points are locked in. They are out of a possible 100 for the whole course.
Step 2 — find your grade on the work completed so far
You have been graded on 20 + 15 + 25 = 60% of the course.
50.65 ÷ 0.60 = 84.42%
So your current standing is 84.42% — a B on a standard US scale.
Step 3 — the part that matters
The final is worth 40%, and you have 50.65 points banked. To finish at 90%:
(90 − 50.65) ÷ 40 = 98.38%
You would need 98.38% on the final to end the course with an A. That is the number no syllabus will ever tell you, and it is worth knowing in week ten rather than the night before.
For comparison, from the same position:
| To finish with | You need on the final |
|---|---|
| 90% (A−) | 98.38% |
| 85% (B) | 85.88% |
| 80% (B−) | 73.38% |
| 70% (C−) | 48.38% |
Your average is not your grade
This is the single most common misunderstanding, and it costs students real letter grades.
Take a course with three scores: 98%, 72%, and 80%.
The simple average is (98 + 72 + 80) ÷ 3 = 83.33% — a solid B.
But apply the actual weights — homework 10%, final 50%, midterm 40%:
98 × 0.10 = 9.80
72 × 0.50 = 36.00
80 × 0.40 = 32.00
─────
77.80%
77.80% — a C+. Five and a half points lower, and a full letter grade different, from exactly the same scores.
The gap opens up because the strongest score sits on the smallest weight and the weakest score sits on the largest. If you have ever felt that your grade was lower than it “should” be, this is almost always why.
When your weights don’t add up to 100%
Two situations, and this calculator handles both.
Relative weights. Some syllabi say a final “counts twice as much as a midterm” instead of assigning percentages. Enter the relationship directly:
| Category | Weight | Score |
|---|---|---|
| Homework | 2 | 95% |
| Projects | 3 | 88% |
| Final | 5 | 70% |
(95 × 2) + (88 × 3) + (70 × 5) = 190 + 264 + 350 = 804
804 ÷ 10 = 80.40%
The weights total 10, not 100, and the formula still works because of that final division. Most calculators reject this outright or silently produce a wrong number. Enter 2, 3, and 5 here and you get 80.40%.
Partially graded courses. Halfway through a semester only some categories have grades. Enter just those. The calculator reads your standing on the graded portion and, once you set a target, tells you what the rest has to average.
Calculating a weighted grade by hand
Useful to know, if only so you can sanity-check any calculator — including this one.
- Convert every score to a percentage. A 44/50 becomes 88%.
- Convert every weight to a decimal. 20% becomes 0.20. If your weights are relative numbers like 2 and 3, skip this and keep them as they are.
- Multiply each score by its weight. Write each product down.
- Add the products together.
- Divide by the total of the weights. Use 1.00 if your decimals sum to 1; use 10 if your relative weights sum to 10.
- Round once, at the end. Rounding each step as you go introduces errors that compound — this is a genuine source of wrong answers, not a technicality.
What you need on the remaining work
Open “What average do I need on the remaining work?”, enter the course grade you are aiming for, and you get the average that everything ungraded has to hit.
Three outcomes are worth naming honestly:
- Under 100% — reachable. You now know the target.
- Over 100% — not reachable at that grade. The calculator will tell you rather than letting you find out in December. Lower the target and run it again to see what is still possible.
- Under 0% — you have already secured that grade. Nothing remaining can take it from you.
Students tend to use this feature twice a semester: once around the midterm to find out where they stand, and once before the final to decide how much of the weekend the final deserves.
Weighted grade vs weighted GPA
Two different things that share a word, and mixing them up is common.
- A weighted grade is your percentage in one course, where categories carry different weights. That is this page.
- A weighted GPA is your grade point average across courses, where honors, AP, or IB classes earn bonus points — an A in AP Chemistry might count as 5.0 instead of 4.0.
Calculate your course percentage here first, then take that letter grade to a GPA calculator.
Where the weighted grade lands on a letter scale
A standard US scale, for reference:
| Percentage | Letter | GPA points |
|---|---|---|
| 97–100% | A+ | 4.0 |
| 93–96% | A | 4.0 |
| 90–92% | A− | 3.7 |
| 87–89% | B+ | 3.3 |
| 83–86% | B | 3.0 |
| 80–82% | B− | 2.7 |
| 77–79% | C+ | 2.3 |
| 73–76% | C | 2.0 |
| 70–72% | C− | 1.7 |
| 67–69% | D+ | 1.3 |
| 63–66% | D | 1.0 |
| 60–62% | D− | 0.7 |
| Below 60% | F | 0.0 |
One warning about the boundaries. An 89.5% is a B+ on this scale — an A− starts at 90%. Many schools round to the nearest whole number, which would make it a 90% and an A−. Many do not. Your syllabus decides, and the difference is a full letter grade. The scale switcher in the calculator covers the UK, Canadian, and Australian systems if yours is not the one above.
Mistakes that produce wrong answers
- Averaging the categories instead of weighting them. The worked example above shows how far off this goes.
- Entering a category average that isn’t an average. If homework is 20% of the course, enter your homework average, not one assignment.
- Counting an ungraded category as zero. Leave it out. Entering
0tells the calculator you scored zero, which is a very different claim. - Rounding as you go. Round once, at the end.
- Using last year’s syllabus. Weights change between semesters and between instructors.
- Forgetting the extras. Participation, attendance, and lab notebooks are often 5–10% of a course and are the categories students most often leave out.
Questions
Does this work if my weights don’t total 100%?
Yes. Enter relative weights like 2, 3, and 5, or enter only the categories graded so far. The formula divides by the total of your weights, so it stays correct either way.
Can I enter points instead of percentages?
Yes. Type 44/50 in the Grade field and it converts to 88% for you.
Why is my weighted grade lower than my average?
Almost always because your weakest scores sit on your heaviest categories. Look at the Adds column — it shows exactly which category is holding the grade down.
Is my data stored anywhere?
No. Everything is calculated in your browser. Nothing is sent to a server and no account is required.
What if I need more than 100% on the final?
Then that grade is out of reach, and it is better to know now. Lower the target and run it again to find the best grade still available.
Ali Rehman — Founder, AR Digitals
I built this calculator after watching students hand-calculate weighted grades on notebook paper and get them wrong, usually because their weights didn’t add to 100% and every tool they tried refused to handle it. This one does. If your school’s grading scheme breaks it, tell me and I’ll fix it.
Published: [date] · Last updated: [17/sep/2026]