Drop Lowest Grade Calculator
See how an equal-weight assignment or quiz average changes when a syllabus drops the lowest scores.
Only drop scores that the syllabus actually allows
Equally weighted scores 70, 80, 90 and 100 average 85. Dropping the lowest eligible 70 raises the remaining average to 90. If a course instead weights quizzes by point totals, deleting the lowest percentage might not be the correct operation, because a 10-point quiz and a 100-point exam contribute differently.
Check whether the rule drops one score, several scores, only a particular category or only completed assessments. This tool deliberately models an equal-weight list; it cannot enforce institution-specific eligibility or decide that missing work should be excluded.
Privacy: calculator inputs are processed in your browser; Lynara does not need to upload these values to calculate the result.
Formula
adjusted average = sum of remaining equal-weight scores ÷ number of remaining scores after the lowest N are removed
Remove the dropped score from both the sum and the count
- Four equal-weight scores of 70, 80, 90 and 100 total 340 and average 85%.
- Removing the 70 leaves 270 across 3 scores, so the new average is 90%. Dividing by the old count of 4 would incorrectly give 67.5%.
What the result tells you
The tool models removal from an equal-weight set rather than a bonus added to the original mean.
Before you use the result
Different point totals, category weights and rules excluding mandatory assessments need the actual course policy instead of this equal-weight model.
Useful for
- Dropping the lowest quiz
- Equal-weight homework averages
- Comparing before-and-after averages
Questions
Can I drop more than one score?
Yes, as long as at least one score remains after the selected number of lowest scores is removed.
Can I use assignments with different point values?
Not reliably. This tool treats each entered score percentage as equal weight.