Grade Calculator
Find your overall weighted grade from assignments, tests, and exams.
What Is the Grade Calculator?
This calculator finds your overall grade by combining multiple assessments — homework, quizzes, midterms, and finals — each weighted by how much it counts toward your final grade. Weighted grading is standard practice at nearly every level of school, because it lets an instructor signal that mastery demonstrated on a final exam should count for more than a single homework set.
Weighting schemes differ significantly by course and instructor: a math class might put 60% of the grade on tests and 40% on homework, while a writing seminar might weight drafts and class participation more heavily than a single final paper. There's no universal standard — the weights are simply the instructor's judgment about which assessments best reflect mastery of the material, and they're normally published in the course syllabus before the term even begins.
Once you know your final percentage in a course, you can feed the resulting letter grade into the GPA / CGPA Calculator to see how it affects your overall average, or check the Exam Countdown tool to plan your remaining study time before the assessments that carry the most weight.
Grade Calculator Formula
Overall % = Σ((Score ÷ Total) × 100 × Weight) ÷ Σ(Weight)
How Is the Grade Calculator Calculated?
Each assessment is converted to a percentage (score divided by total marks), then multiplied by its weight — since a final exam worth 50% of the grade should count far more than a homework set worth 5%. These weighted percentages are summed and divided by the total weight to get the final overall percentage.
Because each assessment's percentage is computed before weighting is applied, assessments with different point totals — a 20-point quiz and a 100-point exam — can be combined without any manual conversion. This is also why the calculator flags a warning if your entered weights don't sum to exactly 100%: the math still produces a mathematically valid proportional result, but a non-100% total often signals a typo rather than an intentional grading scheme.
Grade Calculator Example
Standard case: Homework 45/50 (20% weight), Midterm 78/100 (30% weight), and Final 88/100 (50% weight) combine to an overall grade of 85.4% (B).
Different weights: a Lab 92/100 (25% weight), Quiz 15/20 (15% weight), and Final Exam 70/100 (60% weight) combine to 76.25% (C).
Weights not summing to 100%: Homework 40/50 (20% weight) and a Test 82/100 (30% weight) — with only 50% of the grade entered so far — still produce a valid proportional result of 81.2% (B), alongside a warning that the weights only total 50%.
How to Use the Grade Calculator
Step 1
Add a row for each graded assessment (homework, quiz, midterm, final, etc.).
Step 2
Enter your score and the total marks possible for each one.
Step 3
Enter the weight (%) that assessment counts toward your final grade.
Step 4
Click Calculate Grade to see your overall weighted percentage and letter grade.
Step 5
Check the weight warning if it appears — it means your entered weights don't add to 100%, which is often a data-entry slip.
Step 6
Recalculate after any grade update during the term to track how your standing shifts.
Benefits
- Turns your finished grade into a shareable, branded image card in one tap — handy for messaging a study group or a parent.
- Combines any number of assessments with different weights and totals.
- Automatically converts to a standard letter grade.
- Warns you if your entered weights don't add up to 100%.
- Handles assessments scored out of any total (10, 20, 50, 100) without manual conversion.
- Recalculates instantly as you adjust scores, so you can test "what-if" scenarios for an upcoming exam.
Common Grade Calculator Scenarios
Scenario 1
Checking your current grade in a class partway through the term.
Scenario 2
Figuring out roughly what you need on a final exam to reach a target grade.
Scenario 3
Combining lab, homework, and exam scores that use different point totals.
Scenario 4
Verifying a professor's posted grade against your own calculation of the syllabus weights.
Scenario 5
Tracking your standing across a semester as new assessment scores come in.
Scenario 6
Comparing your grade under two different possible weighting schemes side by side.
Understanding Your Result
The overall percentage reflects your weighted performance across every assessment entered. The letter grade uses a standard scale (90%+ = A, 80–89% = B, 70–79% = C, 60–69% = D, below 60% = F) — your instructor's actual cutoffs may differ slightly.
Keep in mind this calculator uses a simple five-band scale without plus/minus distinctions (like B+ or C-), while many schools do report finer-grained letter grades. If your instructor uses a plus/minus scale, treat the letter shown here as a starting point and compare your exact percentage against your syllabus's specific cutoff table.
Tips
- Leave a future assessment's score blank and estimate it to see how it would affect your final grade.
- Confirm your syllabus's exact weight breakdown before relying on this for a final decision.
- Use consistent "out of" totals if your course reports scores as raw points rather than percentages.
- If a category has multiple items (like five quizzes worth 20% total), either average them into one row or add each quiz as its own row with its individual weight.
- Recheck your entered scores each grading period so you can see exactly how your standing changed after new results come in.
Common Mistakes
- Entering weights that don't add up to 100%, which can make results harder to sanity-check.
- Mixing up the score and the total marks columns for an assessment.
- Assuming a flat average across assessments when they actually carry different weights.
- Forgetting to update a previous assessment's score after a regrade or late submission is recorded, which quietly skews the running total.
- Assuming a missing (ungraded) assessment counts as zero by default — check whether your instructor's policy actually treats it that way before assuming the worst case.
Frequently Asked Questions
What if my weights don't add up to 100%?
The calculator still computes a correct proportional result, but it's best to double-check your course syllabus, since a mismatch often means a typo in one of the weight values.
Can I use this to figure out what I need on my final exam?
Yes — enter your known scores, leave the final exam's score blank or try different values, and recalculate to see what score would produce your target overall grade.
Does this match my school's exact grading scale?
The letter grade uses a common 90/80/70/60 cutoff scale. Some schools use different cutoffs or add +/- grades, so always confirm against your official syllabus.
Can assessments have different point totals, like 20 and 100?
Yes — each assessment is converted to a percentage individually before being weighted, so mixing different point totals works correctly.
What if I have an assessment category I haven't taken yet?
Leave it out of the calculation until you have a score, or enter zero if you want to see your current worst-case running grade including an ungraded category.
How do I calculate what score I need on a remaining assessment to reach a target grade?
Work backward: enter your completed assessments' weighted contribution, subtract that from your target overall grade, and divide by the remaining assessment's weight to find the score needed.
Does this calculator support extra credit?
Check whether extra credit points can be added to a specific category's score — if not directly supported, you can approximate it by adjusting that category's percentage manually.
Can weights be equal for all assessments instead of different percentages?
Yes — set every assessment's weight to the same percentage (or use equal point totals) if your grading scheme treats all assessments equally.
What's the difference between a weighted grade and a simple average?
A weighted grade accounts for the fact that some assessments (like finals) count more toward your final grade than others (like homework), while a simple average treats every assessment equally regardless of importance.
Can I share my grade result as an image?
Yes — tap Share and, on supported devices, your overall grade is shared as a branded image card, not just a text link.
Does this calculator support letter grades with plus/minus (like B+ or A-)?
No — it reports a straight A/B/C/D/F letter based on the standard 90/80/70/60 cutoffs. If your course reports plus/minus grades, compare your exact percentage against your syllabus's specific cutoff table.
Can I use this for a class with grading categories instead of individual assessments?
Yes — treat each category (like "Homework" or "Quizzes") as a single row, entering your average score within that category and the category's overall weight from your syllabus.
What if an assessment is extra credit and doesn't count toward the 100% weight total?
Leave true extra credit out of the weighted calculation and instead add its points directly to a related category's score, since this calculator assumes every row's weight is part of the graded 100%.
Is the grade shown here the same as what shows in my school's official gradebook?
It should match closely if you've entered the same weights and scores your instructor uses, but official gradebook software may round differently or handle dropped lowest scores and extra credit in ways this calculator doesn't automatically replicate.
References
Important Information
Letter grade cutoffs are a common default and may not match your specific school or instructor's scale.
Last updated: July 26, 2026