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Weighted Grade Calculator

Enter each assignment with its weight and get your weighted class average instantly. Or switch tabs to work backwards and find the final exam score you need to hit a target grade. Handles any assessment weighting, with an editable letter grade scale.

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Set this if your course fails you for dropping below a mark on any single component.
Your Grade
B
85.00%
30%
Total Weight
1
Assignments

How to Calculate a Weighted Grade

A weighted grade average is an overall score calculated by giving each assignment a different level of importance, rather than treating every assignment as equally worth the same amount toward the final grade.

For each assignment you add, the calculator first converts your raw score into a percentage: score divided by max score, times 100. So an 8 out of 10 quiz and an 80 out of 100 test both become 80%, regardless of how many points they were originally worth.

That percentage is then multiplied by the assignment's weight, and every assignment's weighted score is summed together and divided by the total weight entered. This means a final exam weighted at 40% pulls your grade four times as hard as a quiz weighted at 10%, even if both scored the same percentage.

Worked example: a quiz at 85% (weight 30), a test at 90% (weight 30), and a project at 75% (weight 40) combine as (85×30 + 90×30 + 75×40) ÷ 100 = 82.5%. The letter grade shown is then looked up against the grade scale, which defaults to A+ at 97%, A at 93%, down to F below 60%, and is fully editable via the "Edit Grade Scale" link under your result.

Final Exam Calculator: the Score You Need

This tab solves the weighted-average formula in reverse. Given your current grade, the weight still remaining (the final exam's weight), and the overall grade you want to end up with, it isolates the one unknown: the score you need on that final assessment.

Concretely, the remaining weight your current grade already accounts for is 100% minus the final's weight. The required score is: (desired grade minus current grade times that remaining weight percentage) divided by the final's weight percentage. For example, with a 75% current grade, a 30%-weighted final, and an 80% target, the required score works out to roughly 91.7%.

If the required score comes out above 100%, the calculator flags the goal as Impossible, meaning it cannot be reached even with a perfect final exam score given your current standing and the exam's weight.

Typical Assessment Weighting Schemes

If your syllabus is vague about weights, these are the patterns most courses fall into. Enter the one matching your course, then replace the estimates with real scores as they come back.

Course typeTypical weighting
Lecture course with a finalHomework 20, midterm 30, final 40, participation 10
Two-midterm courseMidterm 1 25, midterm 2 25, final 35, quizzes 15
Project-based or studioProjects 60, critiques 20, final presentation 20
Lab scienceLab reports 30, exams 45, final 25
Continuous assessment (no final)Assignments 50, tests 30, coursework 20

Two things to watch. A weight is a share of the whole course, so the numbers should sum to 100 even when the assessments themselves are marked out of wildly different point totals. And a category weight covers the whole category: if homework is worth 20 across eight assignments, each one carries 2.5, not 20.

Common Use Cases

Deciding how hard to study: Before finals week, check the exact score needed to hit a target grade so you can gauge how much time to invest in each course.
Mid-semester tracking: Add assignments as they are graded throughout the term to keep a running weighted average rather than waiting until the end of the semester to find out where you stand.
Comparing grading policies: Adjust the editable grade scale to match a specific instructor's syllabus, since cutoffs for each letter grade can vary by course or department.
Sanity-checking a syllabus: Enter the weights listed in a course syllabus to confirm they add up to 100% before the term gets busy.

Common Mistakes With Assessment Weighting

Mixing weight formats: enter weights as whole numbers that sum toward 100 (30, not 0.3). Mixing a fraction into a set of whole-number weights silently breaks the total.
Confusing raw score with percentage: a score of 45 out of 50 is 90%, not 45%. Always enter both the score and the max points so the calculator does the conversion, rather than pre-converting by hand and risking a rounding error.
Double-counting a completed final: if the final exam already happened, add it as a normal assignment in the Weighted Average tab. Only use the Final Grade Needed tab for an exam that has not been taken yet.
Assuming the default letter cutoffs match your syllabus: some instructors round up at the half-point (89.5% = A-), others do not. Use the "Edit Grade Scale" option to match the exact cutoffs printed in your syllabus before trusting the letter grade shown.

When Your Assessment Weights Don't Add Up to 100%

The Total Weight figure shown with your result tells you how much of the course grade the assignments you've entered actually account for. If it reads below 100%, your calculated grade only reflects completed work and will shift once remaining assignments (like a final exam) are added in. If it reads above 100%, double-check the weights you entered against your syllabus: overlapping or duplicated weights will skew the weighted average and produce a misleading result.

Frequently Asked Questions

How do I calculate my weighted grade?▾
For each assignment, calculate the percentage (score ÷ max score × 100), then multiply by its weight. Sum all weighted scores and divide by total weight. Example: 85/100 (30%) + 90/100 (30%) + 75/100 (40%) = (25.5 + 27 + 30) ÷ 100 = 82.5%. This calculator does the math automatically.
What score do I need on my final exam?▾
Use the Final Grade Needed tab. Enter your current grade, desired final grade, and the final exam's weight percentage. The calculator shows the exact score you need. If it says "Impossible," you'd need over 100% on the final to reach your goal.
Can I still fail with a passing weighted average?▾
Yes, and this is the trap a plain average hides. Many courses attach a hurdle: a minimum mark you must reach on a specific component, most often the final exam, or on every component, regardless of your overall percentage. Miss it and you fail the course even at 85% overall. Enter that minimum in the "Must-pass mark per assignment" field and the calculator flags any assignment below it alongside your grade. Leave the field empty if your course has no such rule.
Is a weighted test calculator different from a weighted grade calculator?▾
No, they solve the same problem. "Weighted test calculator" usually means you only want to combine exams, while "weighted grade calculator" covers every assessment type. Either way you enter each item with its score, its maximum, and the share of the course grade it carries. If you only want the exam picture, enter just the exams and read the Total Weight figure as the share of the course those exams represent.
What does assessment weight actually mean on a syllabus?▾
It is the share of the final course grade that assessment controls, not the points it is marked out of. A final marked out of 200 points but listed at 30% still moves your grade exactly 30%, the same as a 50-point midterm listed at 30%. Enter the raw score and max separately and let the weight field carry the syllabus percentage, otherwise large point totals will distort the result.
How is weighted average different from simple average?▾
Simple average treats all assignments equally. Weighted average gives more importance to assignments with higher weight percentages. For example, a final exam worth 40% impacts your grade 4× more than a quiz worth 10%. This calculator supports weighted averages.
What is the standard letter grade scale?▾
Common US scale: A+ (97-100%), A (93-96%), A- (90-92%), B+ (87-89%), B (83-86%), B- (80-82%), C (70-79%), D (60-69%), F (below 60%). This calculator uses this scale by default but lets you customize it.
Can I customize the grading scale?▾
Yes. Click "Edit Grade Scale" below your weighted grade results to adjust the minimum percentage for each letter grade. This is useful if your school uses a different scale.
Do all assignments need to be out of 100 points?▾
No. Enter each assignment's actual score and maximum points. The calculator converts everything to percentages automatically. For example, 8/10 and 80/100 both count as 80%.
What if my weights don't add up to 100%?▾
The calculator displays the total weight used. If it's below 100%, your grade reflects only completed work. If above 100%, some weights may be overstated. Ideally, adjust weights so they sum to 100% for accurate results.
How do I calculate what I need if more than one assignment remains?▾
The Final Grade Needed tab solves for a single remaining item. If several assignments are still outstanding, combine their weights into one figure and treat the average score you need across all of them as the unknown, then check that average is realistic given your strongest and weakest subjects. For a precise per-assignment breakdown, add each one as a placeholder row in the Weighted Average tab with an estimated score and adjust until the total matches your target.
Does extra credit affect the weighted average?▾
Only if you include it as its own entry. Add extra credit as a separate assignment with its actual weight (or a small weight your instructor specifies), since folding it into an existing assignment's score without adjusting the weight will overstate that assignment's influence on the average.

By Toolember · Updated September 2026