Weighted Grade Calculator
Enter each score with its weight to get your weighted average. Weights can be percentages, credits or points, and they don't have to add up to 100.
Weighted grade formula
Multiply each score by its weight, add the results, and divide by the total of the weights:
Weighted average = Σ(score × weight) ÷ Σ(weights)
For an exam score of 90 worth 40% and coursework of 80 worth 60%: (90 × 40 + 80 × 60) ÷ 100 = 8400 ÷ 100 = 84. When the weights add up to 100, this is the same as multiplying each score by its weight as a decimal (90 × 0.4 + 80 × 0.6) and adding.
Worked example
A course where tests count 50%, homework 30% and quizzes 20%:
| Item | Score | Weight | Score × weight |
|---|---|---|---|
| Tests | 88 | 50 | 4400 |
| Homework | 94 | 30 | 2820 |
| Quizzes | 75 | 20 | 1500 |
| Total | 100 | 8720 |
Weighted average = 8720 ÷ 100 = 87.2, a B+ on the typical US scale. The weak quiz score pulls the result down less than it would in a simple average, because quizzes only count 20%.
What if my weights don't add up to 100%?
The calculator normalises them: each weight is divided by the total, so the shares always add up to 100%. That means weights such as 2 and 3 work just as well as 40% and 60%.
For example, an exam score of 90 with weight 2 and coursework of 80 with weight 3 gives (90 × 2 + 80 × 3) ÷ 5 = 420 ÷ 5 = 84, the same as the 40/60 split above.
If your weights add up to less than 100 because some work isn't graded yet, the result is your average on the graded part. With only tests (88, 50%) and homework (94, 30%) graded, that is 7220 ÷ 80 = 90.25. To track a whole course, including categories with no grades yet, use the course grade calculator, which checks that your syllabus weights total 100%.
Weighted vs simple average
A simple average counts every score equally: 90 and 80 average to 85. A weighted average lets some scores count more: with the 80 worth 60%, the result drops to 84.
If all your scores count the same, the average grade calculator is quicker. A GPA is also a weighted average, with credit hours as the weights, so for course grades use the GPA calculator. If a score was marked in points, convert the points to a percentage before entering it.
Frequently asked questions
Do the weights have to be percentages?
No. Any numbers that show how much each score counts will work: percentages from a syllabus, credit hours, point values, or simple multipliers such as 2 for an exam that counts double. The calculator divides by the total weight, so only the proportions matter.
Can I enter letter grades instead of scores?
Yes. A letter is converted to a percentage inside its band on the typical US scale (for example B+ = 88, B = 85 and A = 95), so the result is an estimate. Enter the actual percentage when you have it.
Can a score be over 100?
Yes. If extra credit pushed a score above 100%, enter it as it is, for example 105. Scores can't be negative.
What should I do with work that hasn't been graded yet?
Leave it out. The result is then your weighted average for the work graded so far, which is what most school portals show during the term. To see what you need on what's left, use the final exam grade calculator.
Is a weighted grade the same as a weighted GPA?
No. A weighted grade combines scores inside one course using the weights in your syllabus. A weighted GPA adds extra grade points for honors or AP courses, which the high school GPA calculator handles.