Weighted Grade Calculator
When a syllabus says tests count 50% and homework 20%, a plain average lies. Enter each score with its weight and this calculator produces the true weighted average — and tells you honestly if your weights do not yet add to 100%.
Results
Formula
How to use this calculator
- Add a row per assignment or category.
- Enter the grade as a percentage and its syllabus weight.
- Press Calculate — if the weights do not total 100%, the result normalizes and the notes say so.
Worked example
Tests average 90% with a 40% weight; homework 80% with a 60% weight.
- 90 × 0.40 = 36; 80 × 0.60 = 48.
- Total: 36 + 48 = 84.
Result: The weighted grade is 84%, a B on the standard scale.
Frequently asked questions
My weights only add to 70%. Is the result wrong?
Not wrong — normalized. The calculator divides by the 70% you entered, effectively grading the work so far. The remaining 30% (often the final) can still move the grade substantially.
Should I enter points or percentages?
Percentages. If an assignment was 18/20, that is 90% — convert first, then apply its category weight.
What if a category has several assignments?
Average the assignments inside the category first (or as your syllabus specifies), then enter that category average as one row with the category weight.
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