Education · Grades · Scores
Grade
Calculator
Calculate your current course grade from assignments and categories. Find what score you need on the final exam. Look up letter grades from any percentage scale.
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Course Grade Calculator
Enter your categories (Homework, Exams, etc.) with weights and individual assignment scores.
Final Exam Score Needed
What score do you need on your final exam to reach your target course grade?
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Grade Scale Lookup
Enter a percentage to see the corresponding letter grade across common grading scales.
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Current Grade
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Grade Breakdown
📊 Grade by Category
How Weighted Grades Are Calculated
Most courses use weighted categories — Homework (20%), Quizzes (30%), Exams (50%). Your overall grade is the sum of each category's average multiplied by its weight. If you score 90% on homework (20% weight), that contributes 18 points to your final grade.
Key Formulas
Weighted grade = Σ(category_avg × category_weight%)
Points-based = (total_earned / total_possible) × 100
Final exam required:
needed = (target − current × (1 − final_weight)) / final_weight
Example: target=80, current=75, final weight=30%
needed = (80 − 75 × 0.70) / 0.30 = (80 − 52.5) / 0.30 = 91.7%
Standard letter grade scale (typical US):
A : 90–100% B : 80–89% C : 70–79%
D : 60–69% F : below 60%
How do weighted grades work?
Weighted grades assign different importance to different assignment types. Example: Homework = 20%, Quizzes = 30%, Exams = 50%. If you average 95% on homework, 80% on quizzes, and 75% on exams: Grade = 95×0.20 + 80×0.30 + 75×0.50 = 19 + 24 + 37.5 = 80.5%. Notice exams dominate — a poor exam grade hurts more than a poor homework grade. Always check your syllabus for category weights and drop policies (some drop your lowest quiz or homework grade).
How do I calculate what I need on my final exam?
Formula: needed = (target − current × (1 − final_weight)) / final_weight. Example: target 80%, current grade 72%, final worth 25%. needed = (80 − 72×0.75) / 0.25 = (80 − 54) / 0.25 = 104%. If the result exceeds 100%, the target is not achievable even with a perfect score. In that case, lower your target or focus on any remaining non-final assignments. If it's below 0%, you've already secured the grade regardless of the final.
What is the difference between weighted and points-based grading?
Weighted grading: each category has a set percentage of the final grade regardless of how many assignments are in it. A 10-point quiz and a 100-point quiz count equally within their category. Points-based grading: every point is equal. A 10-point quiz and a 100-point exam contribute proportionally to the total points possible. Most college courses use weighted categories; many high school courses use total points. Check your syllabus — the gradebook structure determines which method applies.
What percentage is an A, B, C?
Standard US scale: A = 90–100%, B = 80–89%, C = 70–79%, D = 60–69%, F = below 60%. Plus/minus scale (common at universities): A = 93–100%, A− = 90–92%, B+ = 87–89%, B = 83–86%, B− = 80–82%, C+ = 77–79%, C = 73–76%, C− = 70–72%. Some schools use a 7-point scale: A = 92–100%, B = 84–91%, C = 76–83%, D = 68–75%, F = below 68%. Always check your institution's specific grading scale.