Weighted Grade Calculator
Calculate your weighted course grade from category scores and weights, with warnings when weights don't add up to 100%.
About the Weighted Grade Calculator
Most courses don't average scores equally — a final worth 40% moves your grade far more than a quiz worth 5%. This weighted grade calculator takes each category's score and its weight from the syllabus, and computes your true overall grade using the weighted average formula: the sum of grade × weight divided by the total weight.
Add as many categories as your course has, and the tool keeps a running check on the weights: if they don't total 100%, it tells you how much of the grade is still unaccounted for and makes clear the result covers only the graded portion so far — exactly the mid-semester situation where you've completed some categories but not the final.
Use it to answer the questions that actually matter during a term: where do I stand right now, and how much can the remaining assessments move my grade? Everything stays in your browser.
How to Use the Weighted Grade Calculator
- 1Enter the grade you earned in each category (as a percentage).
- 2Enter each category's weight from the syllabus.
- 3Add rows for as many categories as your course has.
- 4Read your weighted grade and check the total-weight warning if it isn't 100%.
Frequently Asked Questions
How is a weighted grade calculated? A worked example
Exams 82% (weight 40), assignments 91% (weight 35), quizzes 75% (weight 25): weighted grade = (82×40 + 91×35 + 75×25) ÷ 100 = (3,280 + 3,185 + 1,875) ÷ 100 = 83.4%. The exam pulls the grade down more than the quizzes despite the lower quiz score, because it carries more weight.
What if my weights don't add up to 100%?
The calculator still computes the weighted average over the weights you entered and warns you about the gap. Mid-semester this is normal — if the 40%-weighted final hasn't happened yet, your current standing is the weighted average of the completed 60%. Weights above 100% usually mean a typo or double-counted category.
What grade do I need on the final to reach my target?
Rearrange the average: needed = (target − current × completedWeight/100) ÷ (finalWeight/100). Standing at 83.4% on 60% of the grade and wanting 85 overall with a 40% final: (85 − 83.4 × 0.6) ÷ 0.4 = (85 − 50.04) ÷ 0.4 = 87.4%. Try target scenarios by adding the final as a row.
How is this different from a simple average?
A simple average treats every category equally; a weighted average scales each by importance. The scores 82, 91, 75 average to 82.7 unweighted, but 83.4 weighted — and the gap grows the more the weights differ. If all weights are equal, both methods agree exactly.
Can I use points instead of percentages?
Yes — weights don't have to sum to 100. If categories are worth 200, 150 and 50 points, enter those as weights with your percentage score in each; the formula divides by the total weight so the result is still your correct overall percentage.