Weighted Grade Calculator
Your details
Result
Your weighted grade
- Letter grade
- D−
- Weight accounted for
- 100% of 100%
- Grade on completed work only
- 86.64% (B)
- Weight still to come
- 30%
- 30% of the course is still unscored. "Grade on completed work only" is the figure that reflects where you actually stand; the headline grade counts the unscored categories as zero.
- Final exam carries 30% of the grade, so every point there moves your average by 0.3 of a point. It is worth more than the rest combined in most syllabi.
What each category contributes
Your score in each category, and the percentage points it adds to the final grade.
| Category | Weight | Your score | Points contributed | Points available |
|---|---|---|---|---|
| Homework | 20% | 92% | 18.4 | 20 |
| Quizzes | 15% | 85% | 12.75 | 15 |
| Midterm | 25% | 78% | 19.5 | 25 |
| Final exam | 30% | not scored | 0 | 30 |
| Participation | 10% | 100% | 10 | 10 |
How do you calculate a weighted grade?
To calculate a weighted grade, multiply each category score by its weight as a decimal, then add the results. A 92% homework score at 20% weight contributes 18.4 points. Summing every category's contribution gives the weighted grade, provided the weights add up to 100%.
grade = Σ (score_i × weight_i) ÷ Σ weight_i- score_i
- Your percentage in category i
- weight_i
- That category's share of the final grade
- Σ
- Sum across every category
A weighted grade is a weighted average, and the denominator is what trips people up. If the weights sum to 100, dividing by that sum changes nothing and the grade is simply the sum of each score times its weight. If they do not sum to 100 — because a category is missing or the syllabus is wrong — the division matters, and the two sensible answers diverge. Treating the missing weight as zero gives the figure a gradebook shows mid-semester, which looks alarming because unsat exams count as failures. Rescaling to the weight actually scored gives your standing on completed work, which is the figure you want when deciding how hard to study. This calculator shows both, because presenting only one of them is how students end up either panicking in week six or being surprised in week fifteen. The heaviest category is usually worth more than everything else combined, and that is where effort returns most.
- List every graded category and its weight from the syllabus.
- Convert each weight to a decimal by dividing by 100.
- Multiply each category score by its weight decimal.
- Add all the weighted results together.
- Divide by the total weight if it does not equal 100%.
Worked example: Homework 92% at 20%, quizzes 85% at 15%, midterm 78% at 25%, participation 100% at 10%, final not yet taken at 30%
Homework 92% at 20%, quizzes 85% at 15%, midterm 78% at 25%, participation 100% at 10%, final not yet taken at 30%
Each category contributes its score times its weight. Homework: 0.92 × 20 = 18.4 points. Quizzes: 0.85 × 15 = 12.75. Midterm: 0.78 × 25 = 19.5. Participation: 1.00 × 10 = 10. The final is unscored, so it contributes 0 of its 30 available points. Adding those gives 60.65%, which is a D− — and that is what the gradebook will show, because it counts the unsat final as a zero. The more useful figure is the grade on completed work: the four scored categories carry 70% of the course and have earned 60.65 of those 70 points, so rescaling gives 60.65 ÷ 70 × 100 = 86.64%, a B. The gap between 60.65% and 86.64% is entirely the unsat final, and it also shows the stakes: those 30 points are worth more than homework, quizzes and participation combined.
What each weighted grade input means
- Homework weight
- How much homework counts toward the final grade, from the syllabus. Set it to 0 if your course has no such category.
- Homework score
- Your current average in homework, as a percentage. Scores above 100 are allowed for extra credit.
- Quizzes weight
- How much quizzes counts toward the final grade, from the syllabus. Set it to 0 if your course has no such category.
- Quizzes score
- Your current average in quizzes, as a percentage. Scores above 100 are allowed for extra credit.
- Midterm weight
- How much midterm counts toward the final grade, from the syllabus. Set it to 0 if your course has no such category.
- Midterm score
- Your current average in midterm, as a percentage. Scores above 100 are allowed for extra credit.
- Final exam weight
- How much final exam counts toward the final grade, from the syllabus. Set it to 0 if your course has no such category.
- Final exam score
- Your current average in final exam, as a percentage. Scores above 100 are allowed for extra credit.
- Participation weight
- How much participation counts toward the final grade, from the syllabus. Set it to 0 if your course has no such category.
- Participation score
- Your current average in participation, as a percentage. Scores above 100 are allowed for extra credit.
What this weighted grade does not account for
- Weights that do not sum to 100% produce two different defensible answers, and this calculator shows both. Check the syllabus before trusting either — a missing category is far more common than a syllabus error.
- An unscored category is counted as zero in the headline grade, which is what most gradebooks do. That makes a mid-semester grade look much worse than your actual standing.
- Courses that drop the lowest quiz or assignment will not match this calculation. Work out that category's average after the drop and enter the result.
- Extra credit can push a category above 100%, which is allowed here. Some institutions cap the category at 100% instead, in which case enter the capped figure.
- Points-based courses, where everything is out of a total number of points rather than weighted percentages, do not need this calculation at all — divide points earned by points possible.
- Letter-grade bands vary by institution. The scale here is the common US one where 93% is an A; some schools use 94% or a flat 90%.
Frequently asked questions
How do you calculate a weighted grade?
Multiply each category score by its weight as a decimal and add the results. Homework at 92% with a 20% weight contributes 18.4 points. Sum every category, then divide by the total weight if it is not 100%.
What if my grade weights don't add up to 100?
Either a category is missing or the syllabus is wrong. Check first. If a category genuinely has no weight yet, use the grade on completed work, which rescales to the weight actually scored.
Why is my gradebook grade lower than I expected?
Most gradebooks count unscored categories as zero. If a 30% final has not been taken, you are being graded as though you scored zero on it. The completed-work figure reflects your real standing.
How much does one assignment affect my grade?
By its share of its category's weight. One of ten homework assignments in a category worth 20% carries 2% of the final grade, so a zero on it costs about two percentage points overall.
What is the difference between weighted and unweighted grades?
An unweighted average treats every score equally. A weighted average lets categories count differently, so a 30% final moves your grade three times as much as a 10% participation score.
How do I calculate my grade if assignments are worth points?
Divide total points earned by total points possible, then multiply by 100. Points-based courses need no weighting, because the point values already do that work for you.
Sources and review
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