How to use this calculator
Enter your assessment scores and their weights, then choose the grading scale. Use drop-lowest only when your course policy permits it. Check whether the weights describe assessment groups or individual assignments before entering them.
Method and interpretation
A weighted result is the sum of each score multiplied by its weight, divided by the active weights. The tool normalizes included weights rather than assuming they always sum to 100. Dropped assessments are removed before the remaining active weights are normalized.
Assumptions and limits
Your school may apply category weights, minimum exam requirements or rounding rules differently. This tool cannot infer a syllabus. In particular, dropping one individual assignment is not equivalent to dropping an entire weighted category. Avoid using an empty set of assessments or a zero total active weight.
Worked example
A score of 80 weighted at 40 and a score of 90 weighted at 60 produce (80 × 40 + 90 × 60) / 100 = 86. Weights of 4 and 6 produce the same result because their proportions are identical.