This calculator works out your overall class grade from individual assignments. Enter the points you earned and the points possible for each item, and it returns your overall percentage and letter grade instantly — useful for tracking where you stand mid-term without a spreadsheet.
How it works
The calculator sums the points earned across every row and divides by the sum of points possible, giving an overall percentage:
overall % = (total points earned ÷ total points possible) × 100
That percentage is then mapped to a letter grade on the common US scale: A (90+), B (80-89), C (70-79), D (60-69), F (below 60). Because it works on raw points, a heavier assignment automatically carries more weight — a 200-point final counts ten times as much as a 20-point quiz, with no manual weighting.
Example
| Assignment | Earned | Possible |
|---|---|---|
| Quiz 1 | 18 | 20 |
| Homework | 45 | 50 |
| Midterm | 78 | 100 |
| Final | 165 | 200 |
Totals: 306 earned ÷ 370 possible = 82.7%, which is a B. The 200-point final dominates the result, exactly as it should.
Everything runs in your browser, so your grades never leave your device.