Weighted Grade Calculator
Combine assignment categories by their syllabus weights into a course grade.
Please note: Grading rules vary by institution, and many schools round, cap or weight differently. Always confirm against your own syllabus or registrar before relying on a result.
What the Weighted Grade Calculator does
A weighted grade multiplies each category score by its syllabus weight, sums the results, and divides by the total weight. That last division is what lets you compute a meaningful running grade before every category has been graded.
Formula
Course grade = Σ (Score × Weight) ÷ Σ WeightContribution = Score × Weight ÷ Σ WeightHeadroom = (100 − Score) × Weight ÷ Σ Weight
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Category names | text | Yes | One name per category. Avoid spaces inside a name. |
| Category weights | text | Yes | Percentages from your syllabus, in the same order. |
| Your scores | text | Yes | Percentage achieved in each category, in the same order. |
| Grade scale | one of 3 options | Yes | Check your syllabus — schools differ on whether an A+ is worth more than an A. |
How to use it
- Choose Grade scale.
- Enter Category names, Category weights and Your scores.
- Select Calculate.
Worked example
Homework 20% at 95, quizzes 15% at 88, midterm 25% at 78, final 40% at 85.
- Weights
- 20, 15, 25, 40
- Scores
- 95, 88, 78, 85
(95×20 + 88×15 + 78×25 + 85×40) ÷ 100 = 8,570 ÷ 100 = 85.7%, which is a B.
Reading the result
- "Maximum still achievable" is the ceiling given what is already locked in, which answers a different question than the current grade alone — whether a target is still mathematically possible.
- The headroom calculation assumes perfect performance on the flagged category — a smaller, more realistic improvement there still helps proportionally, even if that category is not the easiest one to actually improve in.
Assumptions and limitations
- Scores already entered for a category are treated as fixed and final — recalculating "maximum still achievable" assumes only ungraded categories can still change.
- Weights are normalised to whatever they sum to, which is convenient mid-term but means a typo in one weight silently changes every other category's effective share rather than raising an error.
Common mistakes
- Entering only the categories graded so far and reading the resulting percentage as the final grade rather than the current running grade — normalisation makes the partial calculation possible, but the number will change once more categories are added.
Frequently asked questions
What if my weights do not add up to 100?
They are normalised to whatever they do total, so the result stays correct. That is exactly what you want partway through a term when some categories are not graded yet.
Where should I focus to raise my grade fastest?
The category with the largest product of weight and remaining headroom. The calculator identifies it — usually a heavily weighted assessment you have not aced.