Grade Calculator (Weighted)

How it works

Most courses use weighted grading: the homework category might count 30%, midterm 30%, and final 40% of your grade. To compute your overall grade, multiply each category's average score by its weight, sum the weighted contributions, and divide by the total weight (which should be 100% if everything is included).

This calculator handles any weight distribution. Enter each assignment or category as a row with its score (in percent) and its weight (in percent). The total weight should sum to 100, but you can also use it for partial calculations — enter just the assignments completed so far, and the weighted average tells you your current grade in those completed weights.

To compute what you need on the final to hit a target grade: subtract your weighted contribution from the target grade, then divide by the final's weight percentage. If you have 80% × 60% (current weighted) and want a 90% with a 40%-weighted final, you need (0.9 - 0.48) / 0.4 = 105% on the final — a clear signal that the target isn't achievable. This calculator doesn't compute target back-solving directly, but you can manually iterate.

Categories vs. individual assignments: some courses average each category internally, then weight the categories. If your homework is 30% of the grade and contains 10 assignments, the average of those 10 (weighted equally within the category) becomes the homework grade. This calculator treats every entered row as flat-weighted; if your course averages within categories, compute each category's average first, then enter one row per category.

Drop policies: many courses drop the lowest 1-2 scores in a category. Compute the category average using only the kept scores. The mathematical effect is a small boost to your grade — usually 1-3% depending on which score gets dropped.

Always double-check the syllabus for the exact grading policy. Edge cases (extra credit, partial credit, late penalties, attendance) can shift your final grade by several percentage points.