Drop Lowest Grade Calculator

Paste assignment percentages, choose how many lowest scores to drop, and compare the before-and-after average.

Scores (%) — spaces, commas, or new lines

Number of lowest scores to drop

—Dropped scores

—Original average

—After dropping

—Change

—Scores kept

Grading scales, rounding rules, extra-credit policies, dropped-score rules, and weighted GPA systems vary by school and course. Match the settings to your syllabus or institution before relying on a result.

Drop Lowest Grade Calculator: Before/After & Sensitivity

Compare original and post-drop averages, verify exactly which scores are removed and measure the sensitivity of dropping one more score.

Pass/reference %

Education grade-planning cluster

Match the gradebook model before trusting the target

Separate question-count tests, pure points, weighted categories, final-exam weighting and GPA scales. Then reconcile the calculator with the syllabus rule actually used by the class.

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Test GradeQuestion-count score, chart and pass margin Class AverageMean, quartiles, spread and pass rate Weighted GradeCategory weights, current grade and target High School GPAWeighted/unweighted GPA and course levels Final ExamRequired score and outcome envelope Points GradePoint totals and next-assignment target Assignment WeightEffective course contribution Missing AssignmentZero, makeup and target recovery

Dropping a score changes the denominator

This calculation is most useful when the course policy really removes one assignment from the grade set. If assignments have different point totals or weights, dropping the numerically lowest percentage is not always the same as dropping the item that improves the weighted course grade the most.

Match the syllabus rule before relying on the result

Check whether the instructor drops the lowest raw score, percentage, category score, or a fixed number of assignments, and whether missing work is eligible. Extra credit, category weights, minimum-assignment rules, and rounding can also change the final grade. Use the result as a planning calculation, then compare it with the grading policy or official gradebook rather than assuming every course uses the same drop rule.

Practical guide and verification

Use the tool first, then use these checks to interpret, verify and hand off the result without displacing the primary workflow.

Match the syllabus rule before dropping anything

Some courses drop the lowest assignment, some drop within each category, and others exclude missing or zero scores differently. Enter only scores governed by the same rule and verify how many items may be removed. The arithmetic cannot infer a policy that is not represented in the input.

Compare before and after denominators

Dropping a score changes both the earned points and the possible points or item count used by the average. Review the before/after values rather than focusing only on the final percentage. This makes it easier to explain why removing a low score can have a smaller or larger effect than expected.

Test ties and missing work explicitly

If several scores are tied for lowest, confirm whether any one may be dropped or whether the gradebook applies another rule. Distinguish a true zero from an ungraded or excused item. Treating blanks as zeros can materially understate the current grade and distort the sensitivity analysis.

Use sensitivity as planning evidence, not a promise

A projected grade after dropping work is only as accurate as the scores and weighting rule entered. Future assignments, category weights, extra credit, rounding, and instructor policies can still change the course grade. Save the entered set and rule alongside any planning conclusion.