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Academics

Grade Calculator

Calculate your weighted grade average from multiple assignments. Find out what score you need on your final exam to reach your target grade. Customizable grading scale included.

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Your Grade
B
85.00%
30%
Total Weight
1
Assignments

How the Weighted Average Tab Works

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.

How the Final Grade Needed Tab Works

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.

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.

When Your 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.
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.