Weighted Grade Calculator

Calculate your weighted course grade from your scores and category weights. Add one line per item as name, score, weight, and the calculator shows your current grade, the letter, how much each item contributes, and the score you still need on the remaining work to reach a target grade. Example: homework 92 (20%), quizzes 85 (15%), midterm 78 (25%) and a project 88 (15%) give 85.1% so far on 75% of the course, and a final worth 25% needs 84.6% to finish with an 85.

How to use the Weighted Grade Calculator

1. Type one line for each assignment or category in the form name, score, weight. For example: Midterm, 78, 25.
2. Enter scores as a percent (88) or as points (17/20). Weights are the percent of the course grade each item is worth.
3. Optional: enter the course grade you want. If your weights add up to less than 100, the calculator treats the rest as work still to come.
4. Press Calculate. You get the weighted grade, a letter, each item’s contribution and the average you need on the remaining work.
5. Use Show steps to see the exact sum so you can check it against your syllabus.

Formula and method

Weighted grade = (score₁ × weight₁ + score₂ × weight₂ + …) ÷ (weight₁ + weight₂ + …)

Each score is multiplied by how much it counts, the results are added, and the total is divided by the total weight. When the weights add to 100, you can skip the division and read the sum directly as your grade.

Example: 92×20 + 85×15 + 78×25 + 88×15 = 1,840 + 1,275 + 1,950 + 1,320 = 6,385. Divide by 75 (the weight so far) to get 85.13%. Divide by 100 instead and you get 63.85 points banked out of 75 possible.

Score needed on the rest = (target − points banked) ÷ (remaining weight ÷ 100). With 63.85 banked, an 85 target and 25% left: (85 − 63.85) ÷ 0.25 = 84.6%.

Weighted average vs simple average

A simple average treats every score equally. A weighted average does not: a 30% final exam moves your grade three times as much as a 10% quiz. That is why a bad score on a heavy item can sink a grade that a perfect homework record cannot rescue. Use this calculator whenever your syllabus lists percentages or point totals for each category.

If the syllabus uses points instead of percentages (for example 400 points total with the midterm worth 100), the weight of the midterm is simply 100 / 400 = 25%. Enter 25 as its weight.

Points system or percent weights?

Both give the same answer when done correctly. In a points system, add all points earned and divide by all points possible. In a percent system, multiply each category average by its weight. A mixed syllabus (say, homework counted by points inside a 20% category) needs two steps: find the category average first, then enter it here as one line with its category weight.

Common grade scale (US plus/minus)

Scales differ by school and instructor. A course may use 90/80/70/60 cutoffs with no plus or minus, or round up at 0.5. Check your syllabus; the percentage shown by this calculator is exact either way.

Worked example: what do I need on the final?

Grades so far: homework 92 (20%), quizzes 85 (15%), midterm 78 (25%) and project 88 (15%). That is 75% of the course and 63.85 points banked. The final is the remaining 25%.

The table shows why it pays to check early: by the end of the term only the grades whose requirement is 100% or less are still reachable.

What if weights add to more or less than 100?

Many instructors list weights that add to 100, but extra-credit items or dropped categories can make the total different. Choose "Treat the missing weight as work still to come" when you are partway through a course, and "Scale the weights" when every item is already graded and you only want the average.

Dropping the lowest score

If your instructor drops the lowest quiz or homework, remove that score from the category before entering it, or enter the category average after the drop. The calculator cannot know which score will be dropped, so doing it yourself gives the real number.

Tips for raising a weighted grade

Start with the biggest weight you have not yet earned, not the biggest gap. Raising a 40% exam from 70 to 80 adds 4 points to your final grade; raising a 5% quiz from 50 to 100 adds only 2.5. Use the "needed on the remaining work" rows to see which targets are still in reach and decide where to spend study time.

Accuracy and limits

The calculator does the arithmetic exactly and rounds results to two decimals. It cannot see your instructor’s rounding policy, curve or late-work rules, so treat the result as an estimate and confirm with your syllabus or grade portal.

Frequently asked questions

How do I calculate a weighted grade?

Multiply each score by its weight, add the results, and divide by the total weight. If the weights add to 100, the sum of score times weight divided by 100 is your grade.

How do I enter points instead of percentages?

Type the score as points earned over points possible, for example 17/20. The calculator converts it to a percent. Enter the item’s weight as the percent of the course grade it is worth.

What if my weights do not total 100%?

Pick "Treat the missing weight as work still to come" to see your standing mid-course and what you need on the rest, or "Scale the weights" to average only what has been graded.

Can the required score be over 100%?

Yes. If the answer exceeds 100%, the target is out of reach unless your instructor offers extra credit. Try a lower target to see what is realistic.

Is a weighted grade the same as GPA?

No. A weighted course grade is a percentage for one class. GPA converts letter grades from many classes into points and averages them by credit hours.

Sources

• Academic grading in the United States (Wikipedia)
• Grade point average (Wikipedia)

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