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How to use
This calculator is for course percentages, not GPA. Enter score-weight pairs for a weighted grade, or work backward to find the final-exam score needed for a target.
- Choose weighted grade or needed-on-final mode.
- For weighted mode, enter one score, weight pair per line.
- For final mode, enter current grade, final weight and target.
- Review the result and reachability status.
How it is calculated
Example
Scores 80 at weight 40 and 90 at weight 60 produce 86%. If current grade is 85, the final is 20% and target is 88, you need 100% on the final.
Important notes
Weights do not need to sum to 100 because weighted mode normalizes by their total. Letter-grade cutoffs vary by institution, so no universal letter scale is assumed.
Worked examples and interpreting results
To calculate a weighted grade, multiply each score by its weight, sum these products and divide by total weight. Example: scores 85, 92 and 78 with weights 20, 30 and 50.
| Case | Calculation | Result |
|---|---|---|
| Weighted score sum | 85 × 20 + 92 × 30 + 78 × 50 | 8,360 |
| Weighted grade | 8360 ÷ (20 + 30 + 50) | 83.6 % |
| Final needed for 85% (current 80%, final worth 30%) | (85 − 80 × 0.7) ÷ 0.3 | 96.666667 % |
How to check the result
Enter one score and weight per line. For Spanish and French decimal-comma input, separate fields using a semicolon, e.g. 85,5; 20, to avoid ambiguity.
Frequently asked questions
Is this the GPA calculator?
No. GPA is a separate tool based on grade points and credits.
What if weights do not total 100?
The result is normalized by total entered weight.
What does needed over 100% mean?
The target is not reachable from the final alone without extra credit.
What is the difference between simple and weighted averages?
A simple average gives every item equal influence. A weighted average multiplies each grade by its weight or credits and divides by total weight, which is appropriate when assessments have different importance.