Final Grade Calculator
Find your final course grade when exams and assignments carry different weights. Ideal for students who want to see exactly how each component contributes to their overall percentage.
About this calculator
A weighted grade distributes importance across different assessment categories rather than treating all scores equally. The formula used here is: Final Grade = (examScore × examWeight / 100) + (assignmentScore × (100 − examWeight) / 100). The exam component contributes examScore × examWeight / 100 percentage points, while assignments contribute the remainder. The two weights must sum to 100%, ensuring the result stays on a standard 0–100 scale. This approach is common in university courses where a final exam might count for 60% and all homework combined counts for 40%. Understanding the weighting helps you prioritize study time and predict the minimum score needed on remaining assessments to achieve a target grade.
How to use
Imagine your exam score is 78%, your assignment score is 92%, and the exam weight is 60% (so assignments carry 40%). Plug into the formula: Final Grade = (78 × 60 / 100) + (92 × (100 − 60) / 100) = (78 × 0.60) + (92 × 0.40) = 46.8 + 36.8 = 83.6%. Enter 78 in Exam Score, 92 in Assignment Score, and 60 in Exam Weight. The calculator returns 83.6%, a solid B. Even though your assignment score was higher, the heavier exam weight pulls the final grade closer to the exam result.
Frequently asked questions
How does exam weight affect my final grade in a weighted grade calculator?
Exam weight determines what fraction of your final grade comes from the exam versus other work. A higher exam weight means a single test performance has an outsized impact on your overall score. For example, if the exam counts 70%, a poor exam score of 50% drags down even a perfect assignment score of 100%: (50 × 0.70) + (100 × 0.30) = 35 + 30 = 65%. Conversely, a low exam weight gives you more room to compensate with strong assignment scores.
What score do I need on my exam to get an A in the course?
Rearrange the weighted grade formula to solve for examScore: examScore = (targetGrade − assignmentScore × (1 − examWeight/100)) / (examWeight/100). For example, if you need an 90% final grade, your assignment score is 95%, and the exam weight is 60%: examScore = (90 − 95 × 0.40) / 0.60 = (90 − 38) / 0.60 = 52 / 0.60 ≈ 86.7%. You would need at least an 86.7% on the exam. Use this reverse calculation to set a clear study target before test day.
Why do professors use weighted grades instead of a simple average?
Weighted grading allows instructors to signal which assessments best demonstrate mastery of course material. A comprehensive final exam may test more skills than a short quiz, so assigning it a higher weight reflects its greater diagnostic value. Simple averages treat a 10-point quiz and a 200-point exam identically, which can distort the true picture of student understanding. Weighted grades also create incentives for students to allocate study time proportionally to each component's impact on their final result.