Weighted Grade Calculator — Weight Your Scores Correctly
Syllabus weights matter: a 90% homework average does not balance a 70% exam if the exam is worth twice as much. Enter each category's score and weight, and GradeLab computes your true weighted average — plus the score you need on the rest of the course to hit your target. Everything runs in your browser; nothing is uploaded or tracked.
One row per category. Score is the category's percentage; weight is its share of the final grade (e.g. homework 30 means 30%).
Worked example: homework 90% (weight 30), quizzes 80% (20), midterm 70% (20) → (90×30 + 80×20 + 70×20) ÷ 70 = 81.43% (B−), with 30% of the grade still ungraded. To finish at 85% overall you need 93.33% on that remaining 30%.
Frequently asked questions
How is a weighted grade calculated?
Multiply each category score by its weight, add them up, and divide by the total weight counted. Example: homework 90% (weight 30), quizzes 80% (20), midterm 70% (20) → (90×30 + 80×20 + 70×20) ÷ 70 = 81.43%, a B−. Categories not yet graded are not counted as zero — they show up as remaining weight.
What if my weights don't add up to 100%?
That's normal mid-semester: part of the grade just isn't graded yet. The calculator reports your weighted average over the categories counted so far, and tells you how much weight is still ungraded. Enter a target grade to see what average you need on that remaining weight.
How do I find what I need on the rest of the course?
Enter a target grade. The required average on the remaining weight is (Target × 100 − points earned so far) ÷ remaining weight. Example: 81.43% over 70% of the grade, target 85% → (8500 − 5700) ÷ 30 = 93.33% on the remaining 30%.
What does it mean if the required score is over 100%?
The target is mathematically out of reach through the remaining work alone — even a perfect score wouldn't get you there. The honest move is to aim for the highest grade you can still reach, or ask your instructor about extra credit.
What letter grade scale is used?
The common US plus/minus scale: A+ ≥ 97%, A ≥ 93%, A− ≥ 90%, B+ ≥ 87%, B ≥ 83%, B− ≥ 80%, C+ ≥ 77%, C ≥ 73%, C− ≥ 70%, D+ ≥ 67%, D ≥ 63%, D− ≥ 60%, F below 60%. Scales vary by school and instructor — confirm your syllabus.