Class Grade Calculator
Combine weighted categories — homework, tests, the final — into your overall grade.
Weights total 100%.
To calculate your class grade, multiply each category’s score by its weight, add them up, and divide by the total weight: overall = Σ(score × weight) ÷ Σ(weight). With homework 90 (20%), a midterm 78 (30%), and a final 85 (50%), that is 18 + 23.4 + 42.5 = 83.9%, a B.
Weighted categories
Most syllabi split your grade into weighted categories — homework 20%, midterm 30%, final 50%, and so on. Your overall grade is each category’s score multiplied by its weight, all added up. A high score in a small category moves your grade far less than the same score in a big one.
dividing by total weight handles syllabi that don’t add to 100
Worked example
Homework 90 (20%), midterm 78 (30%), final 85 (50%).
- 1 Weight each score. 90×0.20 = 18.0, 78×0.30 = 23.4, 85×0.50 = 42.5.
- 2 Add the weighted scores. 18.0 + 23.4 + 42.5 = 83.9.
- 3 Divide by total weight. Weights sum to 1.00, so the overall grade is 83.9% — a B.
When the numbers don’t line up
Weights don’t total 100. No problem — the calculator divides by the total weight you enter, so a partial syllabus still gives your correct current grade so far.
A category isn’t graded yet. Leave it out to see where you stand now, or enter a hypothetical score to see where you’d land. To work out the score you’d need on what’s left to hit a target, switch to the Grade Needed calculator.
Dropped lowest scores. If your syllabus drops the lowest quiz, average the quizzes you’re keeping before entering that category’s score.