Semester Grade Calculator
Enter each graded category, your score, and its weight. Your overall semester grade updates instantly as you type.
Last updated June 2026
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How to Calculate a Weighted Semester Grade
Most course syllabi divide your final grade into weighted categories — homework, quizzes, a midterm, a final, and so on. Each category is assigned a percentage weight that reflects how much it contributes to your overall grade. To find your current overall grade, multiply each category's score by its weight, sum the results, and divide by the total weight.
The Formula
overall = Σ(score × weight) ÷ Σ(weight)
Dividing by the sum of weights (rather than 100) means the calculator gives the correct result even if you've only entered some of your categories — useful for tracking mid-semester.
Worked Example
A course with the following grade breakdown:
Homework (20%): 88%
Quizzes (15%): 76%
Midterm (25%): 82%
Final exam (40%): 79%
Numerator: (88×20) + (76×15) + (82×25) + (79×40) =
1760 + 1140 + 2050 + 3160 = 8110.
Denominator: 20 + 15 + 25 + 40 = 100.
Overall: 8110 ÷ 100 = 81.1% — B.
Difference from the Final Grade Calculator
This calculator tells you your current overall grade from completed categories. The Final Grade Calculator is the complementary tool: it tells you what score you need on an upcoming final exam to reach a target grade. Use both together to plan your semester strategy.
Also see: Points-Based Grade Calculator for courses that use raw point totals rather than category percentages, and GPA Calculator to convert course grades into your semester GPA.
Frequently Asked Questions
How is a weighted semester grade calculated?
Each category (e.g. homework, quizzes, midterm, final) contributes to your overall grade in proportion to its weight. The formula is: overall = (score₁ × weight₁ + score₂ × weight₂ + …) ÷ (weight₁ + weight₂ + …). Dividing by the sum of weights — rather than 100 — means the calculator works correctly even if your weights don't add up to exactly 100%.
What is the difference between this calculator and the Final Grade Calculator?
The Semester Grade Calculator tells you your CURRENT overall grade based on all completed categories. The Final Grade Calculator is forward-looking: it tells you what score you need on an upcoming final exam to reach a target grade. Use this tool to see where you stand now; use the final-grade tool to plan what score you need next.
Do my weights need to add up to 100%?
No. The calculator divides by the sum of the weights you enter, so it works correctly whether your weights sum to 100, 1.0, or any other total. However, if your syllabus lists weights that are meant to sum to 100%, double-check that you've entered them correctly to get an accurate result.
What if I haven't completed all categories yet?
Only enter the categories you have completed and received a score for. Omitting future categories gives you your current grade based on completed work — which is exactly what this calculator is designed to show. Add remaining categories as you receive grades.
Why does my result differ from what my professor's gradebook shows?
Professors sometimes use different rounding methods, drop the lowest score, apply grade floors, or weight sub-categories differently than their syllabus implies. If there's a discrepancy, check for any dropped-score policies or rounding rules in your course syllabus, then ask your professor to clarify.