Grade Calculator

Estimate course grades using weighted percentages or raw points, and compute target final exam objectives.

Grading System

Assignment CategoryScore (%)Weight (%)

Step-by-Step Grade Calculation

Formula:

Grade = ((88 × 20%) + (75 × 30%) + (92 × 50%)) / 100%

Plugged Values:

Grade = (8610.00) / 100 = 86.10%

Overall Grade

86.1%

Letter Grade:B

GPA Equivalent:3.00

Total Weights:100%

How weighted class and final exam grades are calculated

Weighted class grading methods multiply each category score (e.g. homework, quizzes, tests) by its assigned percentage weight, dividing by the total defined weight. Points-based approaches divide total earned points by total possible points to obtain a percentage score.

Final exam target requirements are solved using:Exam Score Needed = (Target Grade - Current Grade × (1 - Exam Weight)) / Exam Weight.

Built and maintained by Meet Shah · Last updated 1 August 2026

What this tool is used for

Working out a weighted average from assignment scores and weights.
Finding what score a final exam needs to reach a target grade.
Checking a reported grade against the components.
Comparing two grading schemes on the same scores.
Seeing how much a single assignment can actually move the total.

Frequently Asked Questions

How is a weighted grade calculated?: Each component's score is multiplied by its weight and the results are summed, then divided by the total weight. That last division is what makes it work when the weights do not sum to 100 — which happens whenever you are calculating a grade partway through a term.
What mark do I need on the final to reach a target?: Rearrange the same equation: required = (target − earned so far) ÷ weight of the final. The arithmetic frequently returns a number above 100, which is the honest answer that the target is no longer reachable rather than an error.
Why does one zero hurt so much more than a low score?: Because the scale is not symmetric around the passing mark. On a typical scheme, moving from 60 to 0 costs the same as moving from 100 to 40, but only the first crosses the fail line — which is why a single missed assignment often does more damage than a whole term of mediocre ones.
How does dropping the lowest score work?: The lowest-scoring item is removed and the remaining weights are renormalised so they still sum to the full total. The subtlety is that dropping a low mark on a heavily weighted item helps far more than dropping a zero on a small one, which is not how people usually assume it works.
Is a curve the same as adding points?: No. Adding points shifts every score equally; a true curve maps the distribution onto a target distribution, so it can change the ORDER of nothing but changes the spacing. A linear scale-up multiplies instead, which helps high scorers most — three commonly conflated operations with different winners.

Common errors and gotchas

Ignoring weights, which is the difference between an average of scores and a grade.
Assuming weights sum to one hundred, when a scheme may drop the lowest score or add extra credit.
Using a letter-grade midpoint rather than the actual percentage.
Applying one institution's letter boundaries to another's scheme.
Forgetting a component that has not been graded yet, which is not the same as a zero.