What Is a Grade Calculator?
A grade calculator computes your overall course grade from individual assignment, test, quiz, and project scores — weighted by each component's share of your final grade. Instead of manually multiplying each score by its weight and summing the results, the calculator does this instantly and displays your overall grade as both a percentage and a letter grade on the standard US scale.
How Weighted Grades Work
Most high school and university courses assign different weights to different types of work. A typical college course might look like this:
| Component | Weight | Your Score | Contribution |
|---|---|---|---|
| Homework | 20% | 88% | 17.6 points |
| Quizzes | 15% | 75% | 11.25 points |
| Midterm | 25% | 82% | 20.5 points |
| Project | 10% | 95% | 9.5 points |
| Final Exam | 30% | 79% | 23.7 points |
| Total | 100% | — | 82.55% (B) |
US Letter Grade Scale Reference
| Percentage | Letter Grade | GPA Equivalent |
|---|---|---|
| 97–100% | A+ | 4.0 |
| 93–96% | A | 4.0 |
| 90–92% | A− | 3.7 |
| 87–89% | B+ | 3.3 |
| 83–86% | B | 3.0 |
| 80–82% | B− | 2.7 |
| 77–79% | C+ | 2.3 |
| 73–76% | C | 2.0 |
| 70–72% | C− | 1.7 |
| 67–69% | D+ | 1.3 |
| 63–66% | D | 1.0 |
| 60–62% | D− | 0.7 |
| Below 60% | F | 0.0 |
Tips for Improving Your Grade
- Focus on high-weight components — a 10% improvement on a 40%-weight final exam is worth 4 grade points; the same improvement on a 10%-weight quiz is only worth 1 grade point.
- Never skip assignments — even a 0% on a low-weight component drags your average significantly.
- Calculate early — use this tool at midterm to identify how much each remaining assessment can move your grade, then prioritise study time accordingly.
- Talk to your professor — many instructors will curve or drop the lowest score. Factor these policies into your calculations.