Enter each grade category from your course syllabus
Category Name
Your Score %
Weight %
Weights total: 100% — All categories entered
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Weighted Grade (live)
Enter individual assignments with their own weights
Assignment
Score %
Weight %
Weights total: 80% — Add 20% more for complete grade
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Weighted Grade (live)
What score do I need on remaining work?
Enter weighted points (0 to 100).
Sum of (Score x Weight%) for completed work
%
Enter completed weight (1–99%).
%
Enter remaining weight (1–99%).
%
Enter target grade (0–100).
Weighted Grade
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⚠️ Disclaimer: This calculator uses the standard weighted average formula for educational planning purposes. Your official grade may differ due to instructor rounding, dropped scores, curves, extra credit, or LMS-specific settings. Always verify against your official course gradebook.
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Sources & Methodology
Weighted average formula verified against published grading guides from MIT OpenCourseWare and NCME standards. All formulas tested for zero-case, normal-case, and edge-case safety before deployment.
MIT OpenCourseWare — Course Grading Policies
Reference for weighted grading system structures used at leading US universities, including standard category-weight approaches and weighted average formula applications across STEM and humanities courses.
National Council on Measurement in Education (NCME)
Standards for classroom grading practices including proper application of weighted averages in summative and formative assessment across K-12 and higher education institutions.
Verified Formulas (all tested for edge cases):
Category/Assignment Mode: Weighted Grade = Sum(Score_i x Weight_i) / Sum(Weight_i)
Impact per category: Grade contribution = Score_i x (Weight_i / Total_Weight)
Score Needed Mode: Score = (Target - Earned_Points) / (Remaining_Weight / 100)
GPA: A=4.0(93+), A-=3.7(90-92), B+=3.3(87-89), B=3.0(83-86), B-=2.7(80-82)
GPA continued: C+=2.3(77-79), C=2.0(73-76), C-=1.7(70-72), D=1.0(60-69), F=0.0(below 60)
Zero case: all scores = 0 produces 0% output. Division by zero guarded throughout with isFinite() checks.
How to Calculate Weighted Average Grade — Full 2026 Guide
A weighted grade is the most accurate measure of your academic performance when different assignments carry different importance. A final exam worth 40% of your course grade has four times the mathematical impact of a quiz category worth 10%. Understanding this — and knowing exactly which category has the highest leverage on your overall score — is the difference between strategic studying and uncertain guessing.
The Weighted Grade Formula — Verified and Explained Step by Step
Weighted Grade = Sum of (Score_i x Weight_i) / Sum of all Weights
Full worked example — 4-category course:
Homework: 92% score, 20% weight → 92 x 20 = 1,840
Quizzes: 85% score, 20% weight → 85 x 20 = 1,700
Midterm: 77% score, 30% weight → 77 x 30 = 2,310
Final Exam: 88% score, 30% weight → 88 x 30 = 2,640
Sum = 8,490 | Total weight = 100
Weighted Grade = 8,490 / 100 = 84.9% (B)
Homework: 92% score, 20% weight → 92 x 20 = 1,840
Quizzes: 85% score, 20% weight → 85 x 20 = 1,700
Midterm: 77% score, 30% weight → 77 x 30 = 2,310
Final Exam: 88% score, 30% weight → 88 x 30 = 2,640
Sum = 8,490 | Total weight = 100
Weighted Grade = 8,490 / 100 = 84.9% (B)
Simple Average vs Weighted Average: Why They Give Different Results
| Category | Score | Weight | Weighted Points |
|---|---|---|---|
| Homework | 90% | 10% | 9.0 |
| Midterm Exam | 70% | 40% | 28.0 |
| Final Exam | 80% | 50% | 40.0 |
| Result | Simple: 80.0% | Weighted: 77.0% | 77.0 total pts |
Simple average (80%) overstates performance because it treats the 10%-weight homework as equally important as the 50%-weight final. Weighted average (77%) is the accurate result — the poor midterm at 40% weight correctly drags the score below the simple average.
How to Identify Your Highest-Leverage Category
Not all grade improvements are equal. A 10-point improvement in a 40%-weight category adds 4.0 points to your overall grade. The same 10-point improvement in a 10%-weight category adds only 1.0 point. Strategic students use the impact breakdown in this calculator to identify where effort has the most grade leverage, then prioritise study time accordingly.
Category Contribution = Score x (Category Weight / Total Weight)
Example — finding the weakest high-impact category:
Midterm 77% x (30% / 100%) = 23.1 grade points contributed
Homework 92% x (20% / 100%) = 18.4 grade points contributed
Improving Midterm from 77% to 87% adds: 10 x 0.30 = +3.0 overall grade points
Improving Homework from 92% to 100% adds: 8 x 0.20 = +1.6 overall grade points
Conclusion: Midterm study is 1.9x more impactful per point gained than Homework.
Midterm 77% x (30% / 100%) = 23.1 grade points contributed
Homework 92% x (20% / 100%) = 18.4 grade points contributed
Improving Midterm from 77% to 87% adds: 10 x 0.30 = +3.0 overall grade points
Improving Homework from 92% to 100% adds: 8 x 0.20 = +1.6 overall grade points
Conclusion: Midterm study is 1.9x more impactful per point gained than Homework.
GPA Equivalents for Weighted Grade Results
| Percentage | Letter Grade | GPA (4.0 scale) |
|---|---|---|
| 93–100% | A | 4.0 |
| 90–92% | A- | 3.7 |
| 87–89% | B+ | 3.3 |
| 83–86% | B | 3.0 |
| 80–82% | B- | 2.7 |
| 77–79% | C+ | 2.3 |
| 73–76% | C | 2.0 |
| 70–72% | C- | 1.7 |
| 60–69% | D | 1.0 |
| Below 60% | F | 0.0 |
What Happens When Weights Do Not Add to 100%
If your entered weights total less than 100%, the calculator divides by your actual entered total — giving your grade on completed work only, not your projected final grade. This is the correct behaviour mid-semester when not all categories have been graded. The remaining weight represents future ungraded assignments. If weights exceed 100%, recheck your syllabus for double-entered categories or incorrect weight values.
How Canvas, Blackboard and Brightspace Calculate Weighted Grades
All major learning management systems use the same weighted average formula. They group assignments into instructor-defined categories, average scores within each category (optionally dropping the lowest), then apply the category weights. If your calculated grade differs from your LMS grade, the most common causes are: the LMS is dropping the lowest assignment in a category, ungraded items are counting as zero, or the LMS rounds category averages to two decimal places before combining. Match those exact settings in this calculator for the most accurate match.
💡 What-if modelling: Enter your actual grades, then change a category score (like the final exam) to 70%, 80%, or 90% to see exactly how different outcomes affect your course grade. This shows the realistic grade range you are working in and helps you set accurate study goals well before exam day.
Frequently Asked Questions
Weighted Average Grade = Sum of (Score x Weight) for all categories, divided by the sum of all weights. When weights sum to 100%: WG = S1 x (W1/100) + S2 x (W2/100) + ... Example: HW 92% (20% wt), Quizzes 85% (20% wt), Midterm 77% (30% wt), Final 88% (30% wt) = (92x0.20) + (85x0.20) + (77x0.30) + (88x0.30) = 18.4 + 17.0 + 23.1 + 26.4 = 84.9%.
A weighted grade assigns different importance levels to different assignments or categories. A final exam worth 40% has 4x the grade impact of a homework category worth 10%. The weighted average formula correctly reflects that performance on high-stakes exams matters more than low-stakes homework. This is how virtually all US colleges, high schools, and learning management systems calculate course grades.
Highest-weight categories have the most absolute impact. But strategic impact depends on where your score is lowest relative to your target. Improving from 60% to 90% in a 40%-weight category adds 12 overall grade points. The same improvement in a 10%-weight category adds only 3 points. Use the impact breakdown in this calculator to see each category's exact contribution and identify where to focus your study effort.
Simple average treats all assignments equally: (90+70+80)/3 = 80%. Weighted average multiplies each by importance: HW 90% (10% wt) + Midterm 70% (40% wt) + Final 80% (50% wt) = 9 + 28 + 40 = 77%. Weighted is accurate; simple is misleading when weights differ. Your low midterm score at 40% weight hurts much more than the simple average suggests.
Score Needed = (Target - Weighted Points Earned) / (Remaining Weight / 100). Example: target 93%, earned 65 weighted points (75% done), 25% remains. Score = (93 - 65) / 0.25 = 28 / 0.25 = 112%. Above 100% means an A is not achievable without extra credit. If negative, you have already secured that grade. Use the Score Needed mode in this calculator for instant results.
If entered weights total under 100%, the calculator divides by your actual total weight to show your grade on completed work only. This is correct mid-semester. The remaining weight represents future ungraded work. If weights exceed 100%, recheck for double-entered categories or wrong weight values. Your syllabus weights must always sum to exactly 100% for a full course grade calculation.
When assignments use different point maximums, use total points as the system: Grade = (Total Points Earned / Total Points Possible) x 100. A 200-point final automatically counts twice as much as a 100-point midterm because it has twice the point value. This is identical to a weighted average where each item's weight equals its maximum point value.
Yes. Cumulative GPA is a credit-weighted average: GPA = Sum(Semester GPA x Credits) / Total Credits. Enter each semester GPA as the score and credit hours as the weight. However, for full GPA calculation on the 4.0 scale from individual course grades, use our dedicated College GPA Calculator which handles quality point conversion correctly.
Mathematically exact when using the same formula and inputs as your instructor. Discrepancies arise from: dropped lowest scores (remove before averaging the category), LMS rounding at each category level, extra credit above 100%, or missing assignments counted as zero. Match your weights exactly to your syllabus and enter the same category averages your LMS shows for highest accuracy.
85% = B on the standard US grading scale, approximately 3.0 GPA. Scale: 93%+ = A (4.0), 90-92% = A- (3.7), 87-89% = B+ (3.3), 83-86% = B (3.0), 80-82% = B- (2.7), 77-79% = C+ (2.3), 73-76% = C (2.0), 70-72% = C- (1.7), 60-69% = D (1.0), below 60% = F. Some schools use 90%+ = A, 80-89% = B -- always verify your institution's exact scale.
Canvas, Blackboard, and Brightspace all use the standard weighted average formula. They group assignments into instructor-defined categories, average scores within each category (optionally dropping lowest), then apply category weights. If your LMS grade differs from this calculator, check whether the LMS drops a lowest score, counts ungraded items as zeros, or rounds category averages before combining.
Professors list category weights in the syllabus (e.g., Homework 20%, Quizzes 20%, Midterm 25%, Final 35% = 100% total). Within each category, all assignments average equally unless a drop-lowest policy applies. The weighted average formula combines category averages using those weights. This calculator lets you enter any syllabus weight structure and calculate your exact current and projected course grade.
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