Grade Calculator: Weighted Grades and Final Exam Target
Free calculator · clear working
Calculate a weighted course grade or find the final exam score needed to reach your target. Enter percentages and weights without converting them to decimals.
Go to the calculator ↓Runs in your browser. No account needed. Calculator inputs stay on this page and are not sent to a calculation server.
Use the Grade Calculator
How to use this calculator
For weighted grades, enter matching score and weight lists. Weights may add to any positive total; the calculator normalizes them. For a final exam target, enter your current grade excluding the final, the final's share of the whole course, and your desired overall grade.
Formula and method
Weighted grade = Σ(score × weight) ÷ Σweights. Required final score = [target − current grade × (1 − final weight/100)] ÷ (final weight/100).
Worked example
Scores of 90, 80, and 95 with weights 30, 30, and 40 give 89%. With a current grade of 85%, a final worth 30%, and a target of 90%, the required final score is about 101.67%, which exceeds a standard 100% exam.
Assumptions and limits
Scores are limited to 0–100 and weights are nonnegative. Extra credit, dropped assignments, category-specific rules, letter-grade cutoffs, and instructor rounding are not modeled. Always compare the result with your syllabus.
Common questions
Do weights need to add to 100?
No. For weighted grades, any positive total works because each weight is divided by the sum. Use only completed work if you want your current grade.
What does a required score above 100% mean?
The target is not reachable on a standard 100-point exam under these assumptions. A negative required score means the target is already met even with a zero on the final.
Related calculators
Method reference: OpenStax textbook. Formula and tool checked October 31, 2026. Results are rounded for display.
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