Weighted Grade Calculator
Calculate your overall weighted course grade from assignments, quizzes, tests, and finals. Supports percentage weights, point systems, drop-lowest score rules, and what-if target planning.
Assignment Categories & Weights
Rows with a blank grade or blank weight are ignored and never treated as zero.
What-If Planning (Remaining Work)
Calculate the exact score needed on your remaining assignments or final exam to secure your target grade.
Formula: Σ(Grade × Weight) ÷ 100
= (88 × 20 + 92 × 20 + 85 × 25 + 90 × 35) ÷ 100
= 8875 ÷ 100 = 88.75%
How to Calculate a Weighted Grade
A weighted grade is calculated by multiplying each individual assignment or category grade by its assigned weight, summing those products together, and dividing by the total weight.
In standard academic coursework, different assignment types contribute unequally to your final semester standing. For example, a final exam worth 35% has a far greater mathematical impact on your grade than a weekly quiz worth 5%. To determine your cumulative grade, follow these three sequential steps:
Multiply Grade by Weight
Multiply each category percentage by its weight value. For example, earning 90% on a 20% homework category contributes 18 weighted points (90 × 0.20 = 18).
Sum All Weighted Points
Add up the individual weighted contributions from every category to find your cumulative earned weighted point total.
Divide by Total Weight
Divide your cumulative earned points by the sum of all category weights (100 in standard syllabus systems, or sum of credits in point systems).
Weighted Grade Formula
The mathematical formula for a weighted grade expresses the sum of all weighted scores divided by the total sum of category weights.
Depending on whether your course syllabus measures weights as percentages totaling 100% or as variable points and credit hours, use the corresponding algebraic formulation below:
Used when category percentage weights sum to 100% (e.g., Homework 20%, Quizzes 20%, Midterm 25%, Final 35%).
Used when weights represent arbitrary points, credit units, or when syllabus weights do not total 100.
Worked Example of a Weighted Grade
Consider a typical college course with four categories: Homework (88% grade, 20% weight), Quizzes (92% grade, 20% weight), Midterm Exam (85% grade, 25% weight), and Final Exam (90% grade, 35% weight).
Here is the full arithmetic breakdown demonstrating how each category contributes to the final 88.75% course grade:
| Category | Earned Score | Syllabus Weight | Mathematical Calculation | Weighted Contribution |
|---|---|---|---|---|
| Homework | 88% | 20% (0.20) | 88 × 0.20 | 17.60 pts |
| Quizzes | 92% | 20% (0.20) | 92 × 0.20 | 18.40 pts |
| Midterm Exam | 85% | 25% (0.25) | 85 × 0.25 | 21.25 pts |
| Final Exam | 90% | 35% (0.35) | 90 × 0.35 | 31.50 pts |
| Total Course Grade | — | 100% | 17.60 + 18.40 + 21.25 + 31.50 | 88.75% (B+) |
Weighted vs Unweighted Grades
An unweighted grade treats every assignment equally regardless of difficulty, whereas a weighted grade scales each task according to its syllabus importance.
To see how weighting changes academic outcomes, examine the table below comparing the exact same student scores calculated under both grading systems:
| Grading System | Formula | Sample Arithmetic | Result | Key Academic Trait |
|---|---|---|---|---|
| Unweighted Average | Σ(Grades) ÷ Count | (88 + 92 + 85 + 90) ÷ 4 | 88.75% | A 5-point homework assignment has identical weight to a 100-point exam. |
| Weighted Average | Σ(Grade × Weight) ÷ 100 | (88×0.2)+(92×0.2)+(85×0.25)+(90×0.35) | 88.75% | High-stakes tests and projects proportionally impact the semester grade. |
What If My Weights Do Not Add Up to 100?
When your entered category weights do not equal 100%, you must distinguish between your current running average and your total course point contribution.
During the middle of a semester, you may have only completed 60% or 70% of the course syllabus. There are two primary ways to interpret your standing:
1. Current Running Average (Normalized)
Normalizing scales your completed coursework to 100%. If you earned 48 weighted points out of 60% completed work, your running average is (48 ÷ 60) × 100 = 80.00%. This represents your current letter grade if the semester ended today.
2. Course Contribution (Raw Points)
Raw point contribution shows the absolute percentage of the final 100% course grade you have locked in so far. In the same scenario, you have locked in 48.00% of the total 100% course points, with 40.00% still available to earn.
How Drop-Lowest-Score Grading Works
Drop-lowest-score grading automatically identifies and removes your single lowest assignment grade from the calculation, recalculating your average across the remaining weights.
Instructors frequently use this policy for homework assignments or weekly quizzes to forgive an anomalous bad test day. When an item is dropped:
- The numerical score and its corresponding weight are eliminated from the numerator and denominator.
- The remaining assignments are re-normalized across the active weight sum, instantly elevating your course average.
- In our calculator, enabling "Drop Lowest Score" strikes through the disqualified row and recalculates your true standing in real time.
Standard Letter Grade Scale & 4.0 GPA Conversion
The standard academic grading scale converts course percentage ranges into letter grades and 4.0 grade point average (GPA) equivalents.
| Letter Grade | Percentage Range | Band Midpoint | 4.0 GPA Equivalent |
|---|---|---|---|
| A+ | 97.0% – 100% | 98.5% | 4.0 |
| A | 93.0% – 96.9% | 95.0% | 4.0 |
| A- | 90.0% – 92.9% | 91.5% | 3.7 |
| B+ | 87.0% – 89.9% | 88.5% | 3.3 |
| B | 83.0% – 86.9% | 85.0% | 3.0 |
| B- | 80.0% – 82.9% | 81.5% | 2.7 |
| C+ | 77.0% – 79.9% | 78.5% | 2.3 |
| C | 73.0% – 76.9% | 75.0% | 2.0 |
| C- | 70.0% – 72.9% | 71.5% | 1.7 |
| D+ | 67.0% – 69.9% | 68.5% | 1.3 |
| D | 63.0% – 66.9% | 65.0% | 1.0 |
| D- | 60.0% – 62.9% | 61.5% | 0.7 |
| F | < 60.0% | 50.0% | 0.0 |
Frequently Asked Questions About Weighted Grades
Find clear, mathematically precise answers to the most common questions regarding weighted grades, category percentages, credit hours, and GPA conversion.
How do I calculate my weighted average grade?
To calculate your weighted average grade, multiply each assignment or category score by its percentage weight, add all the resulting products together, and divide by the total weight sum (or 100 if weights total 100%). For instance, if you scored 90% on assignments worth 30% and 80% on exams worth 70%, your calculation is (90 × 0.30) + (80 × 0.70) = 27 + 56 = 83%.
What if my weights do not equal 100?
When entered weights total less than 100%, divide your raw point contribution by the sum of completed weights and multiply by 100 to find your current running average. For example, if you earned 42 weighted points out of 50% completed coursework, your running course grade is (42 ÷ 50) × 100 = 84%.
How do I convert letter grades to a weighted average?
Convert each letter grade to its percentage band midpoint before multiplying by its weight (for example, A = 95%, B = 85%, C = 75%, D = 65%, F = 50%). If an A (95%) is worth 40% and a B (85%) is worth 60%, your weighted average is (95 × 0.40) + (85 × 0.60) = 38 + 51 = 89% (B+).
What is my grade if homework is 20% and tests are 80%?
If homework is worth 20% and tests are worth 80%, multiply your homework average by 0.20 and your test average by 0.80, then sum the two values. For example, with a 95% on homework and an 80% on tests, your overall grade is (95 × 0.20) + (80 × 0.80) = 19 + 64 = 83%.
How do credit hours affect my grade?
Credit hours act as weights in collegiate GPA calculations, where a 4-credit course has double the influence of a 2-credit course. To find your semester grade, multiply each course grade (or grade points) by its credit hours and divide the total by your sum of credit hours.
What happens if my teacher drops the lowest score?
When the lowest score is dropped, that assignment's grade and weight are completely removed from your gradebook, and your remaining assignments are re-weighted across the remaining total weight. Dropping a low quiz score immediately raises your category average by eliminating the negative drag of your worst score.
Is a weighted grade the same as GPA?
No, a weighted course grade is the overall percentage earned within a single class using assignment category weights, whereas Grade Point Average (GPA) is the cumulative 0.0 to 4.0 weighted scale representing performance across all academic courses.
How do I calculate my grade with points instead of percentages?
To calculate a weighted grade using points or credits, multiply each grade by its point weight, sum the weighted products, and divide by the total points possible across all categories: Σ(Grade × Points) ÷ Σ(Total Points).