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Weighted Grade Calculator

Calculate your overall course grade when different assignments or categories have different weights. Enter each component with its weight percentage and score — your weighted average updates instantly. Use What If to see how any single score change impacts your overall grade.

Assignment / CategoryScore (%)Weight (%)

Weighted Grade

89.25%

Letter Grade: B+

Total Weight

100.0%

Assignments

Letter Grade

B+

How to Use the Weighted Grade Calculator

This calculator computes your overall grade when different assignments or categories count for different percentages of your final grade. Use the Calculate tab to enter all assignments and see your current grade. Use the What If tab to explore how changing one score affects your overall grade.

In the Calculate tab, enter each assignment or category name, the score you received (as a percentage, 0–100), and its weight (the percentage it counts toward your final grade).
All weights should sum to 100%. A warning appears if they don't, though the calculator still produces a result.
Your weighted grade updates instantly as you type.
Switch to What If to select any assignment and enter a different hypothetical score to see how your overall grade would change.
Hit Share to copy a URL with your current inputs for bookmarking or sharing.

Weighted Grade Formula

The weighted grade formula multiplies each score by its weight (as a decimal), sums the products, then divides by the total weight. This ensures high-weight items like a final exam have more influence on your grade than low-weight items like daily homework.

Weighted Grade = Σ(Score × Weight) ÷ Σ(Weight)

Example:
Homework: 88% × 15% = 13.20
Quizzes: 82% × 10% = 8.20
Midterm: 91% × 25% = 22.75
Lab/Project: 95% × 20% = 19.00
Final Exam: 87% × 30% = 26.10
─────────────────────────────
Sum = 89.25 ÷ 100 = 89.25% → B+

What If Analysis

The What If tab lets you change one assignment score and immediately see the impact on your overall grade. This is particularly useful for:

Pre-final exam planning: "If I score 80% on the final (30% of grade), what overall grade do I get?"
Understanding high-stakes assignments: See which assignments have the most leverage on your grade
Setting realistic targets: Find the minimum score you need on remaining work to reach your desired grade

The impact number shows the exact percentage-point change from your current grade to the hypothetical grade — positive means improvement, negative means a lower grade.

Understanding Weight Percentages

Typical college course syllabus:

Homework: 15% | Quizzes: 10% | Midterm: 25% | Lab/Project: 20% | Final Exam: 30%

Total: 100% — weights sum correctly.

Key insight: Improving a 30%-weight final exam score by 10 points moves your overall grade 3 points. Improving a 10%-weight quiz by 10 points moves it only 1 point. Focus your effort on high-weight items.

Extra Credit

You can enter scores above 100% to account for extra credit. For example, if you earned 105% on a homework assignment with extra credit, enter 105 as the score. The weighted average calculation will include the bonus, potentially pushing your overall grade above 100%.

Grade Scale Reference

A+ 97–100 | A 93–96 | A- 90–92 | B+ 87–89 | B 83–86 | B- 80–82
C+ 77–79 | C 73–76 | C- 70–72 | D+ 67–69 | D 63–66 | D- 60–62 | F 0–59

Frequently Asked Questions

A weighted grade calculator computes your overall course grade when different components count for different percentages. Unlike a simple average where every grade counts equally, a weighted average multiplies each score by its importance before averaging. This reflects how most real courses are graded — final exams typically matter more than daily homework.

The calculator still computes a result by dividing the sum of (score × weight) by the total of all weights entered — not by 100. However, it shows a warning because weights should sum to 100% to accurately represent your course breakdown. If they don't, you may have missed a category or entered an incorrect weight. Check your syllabus and adjust until the total reads 100%.

Weight percentages are listed in your course syllabus, usually in a section labeled "Grade Breakdown," "Grading Policy," or "Assessment." They're typically expressed as percentages — for example, "Exams: 60%, Homework: 20%, Final: 20%." If you can't find them, ask your professor or check your course management system (Canvas, Blackboard, Moodle).

Yes. Add a separate row for each exam with its individual weight. For example, if you have three exams worth 15%, 20%, and 25% respectively, add three rows: Exam 1 (15%), Exam 2 (20%), Exam 3 (25%). The remaining weight would be split among other components. Just ensure all weights across all rows total 100%.

A weighted grade (this calculator) computes your grade within a single course based on how different assignments are weighted in the syllabus. A weighted GPA (a different calculator) refers to a high school GPA that gives extra grade points for honors, AP, or IB courses — typically on a 5.0 scale instead of 4.0. They use similar math but apply in different contexts.

The What If calculator uses the same weighted average formula as the Calculate tab, so it's mathematically precise. The result tells you exactly what your weighted grade would be if you received that hypothetical score on the selected assignment — assuming all other scores remain the same. It's a reliable tool for setting grade targets before a final exam or major project.