Grade Calculator – Weighted Grade & Final Exam Score
Calculate your weighted course grade, letter grade, and the score you need on your final exam. Add any number of categories with custom weights. Free, private, and runs entirely in your browser.
Calculate Your Grade
Add categories or solve for the finalResults
Awaiting calculationYour grade will appear here
Enter your grades and weights, then click Calculate to see your weighted grade and letter grade.
What does this grade calculator do?
This free online grade calculator helps students and teachers compute weighted course grades, overall percentages, and the score needed on a final exam to reach a target grade. Whether your course uses categories like homework, quizzes, midterms, and finals — each with its own weight — this tool does the math instantly.
Instead of manually multiplying each grade by its weight and adding everything up, just enter your categories, grades, and weights. The calculator shows your weighted grade, the equivalent letter grade, and a breakdown of how each category contributes to your overall score.
There's also a dedicated final exam calculator. Enter your current grade, how much the final is worth, and your target grade, and the tool tells you exactly what score you need on the final to hit your goal. If the required score is above 100%, the calculator warns you that the target may not be reachable without extra credit.
How weighted grades are calculated
Most courses don't use a simple average. A final exam is typically worth more than a single homework assignment, and a midterm usually outweighs a quiz. This is called weighting.
The formula for a weighted grade is:
Weighted Grade = Σ(Grade × Weight) ÷ Σ(Weight)
In plain English: multiply each category's grade by its weight, add all those products together, then divide by the sum of all weights. If your weights add up to 100%, the result is your overall course grade as a percentage.
Example: Calculating a weighted grade
Suppose your course has these categories:
| Category | Your Grade | Weight | Grade × Weight |
|---|---|---|---|
| Homework | 92% | 20% | 92 × 20 = 1840 |
| Quizzes | 84% | 15% | 84 × 15 = 1260 |
| Midterm | 78% | 25% | 78 × 25 = 1950 |
| Final Exam | 88% | 40% | 88 × 40 = 3520 |
Sum of products = 1840 + 1260 + 1950 + 3520 = 8570
Sum of weights = 20 + 15 + 25 + 40 = 100
Weighted grade = 8570 ÷ 100 = 85.7%
What if my weights don't add up to 100%?
That's fine. The calculator normalizes automatically. If your graded categories only add up to 70% (because 30% of the course hasn't been graded yet), the weighted average is calculated over that 70%. This gives you your current grade based on work completed so far.
How to calculate what you need on the final exam
The final exam calculator uses this formula:
Required Final Score = (Target Grade − Current Grade × (1 − Final Weight)) ÷ Final Weight
For example, if your current grade is 86%, the final is worth 30%, and you want a 90% course grade:
Required = (90 − 86 × 0.70) ÷ 0.30 = (90 − 60.2) ÷ 0.30 = 29.8 ÷ 0.30 = 99.3%
That's high — you'd need almost a perfect score. If the required score exceeds 100%, the target isn't mathematically reachable without extra credit or a curve.
Why use this grade calculator?
Weighted grade support
Handles any number of categories with custom weights. Perfect for courses that use homework, quizzes, midterms, and finals.
Final exam calculator
Find out exactly what score you need on the final to hit your target grade. Know before you study how much effort is required.
Letter grade assignment
Get an automatic letter grade (A, B, C, D, F) alongside your percentage based on a standard grading scale.
Category breakdown
See how each category contributes to your overall grade with a detailed result card for every entry.
100% private
Everything runs in your browser. Your grades never leave your device — no server, no logs, no tracking.
Works offline
Once the page loads, you can calculate grades without an internet connection. Bookmark it for exam season.
Standard letter grade scale
Grades vary by institution, but most schools and universities use a scale similar to the one below. Always check your school's specific grading policy for the official scale.
| Percentage | Letter Grade | Description |
|---|---|---|
| 90% – 100% | A | Excellent |
| 80% – 89% | B | Very Good |
| 70% – 79% | C | Good |
| 60% – 69% | D | Satisfactory |
| Below 60% | F | Fail |
Some institutions use finer gradations: 93–96% = A, 90–92% = A−, 87–89% = B+, and so on. The grade boundaries can shift by a few percentage points depending on the school.
Tips for improving your grade
- Know your weights. Check your syllabus for the exact weight of each category. A 5% quiz and a 40% final are not equally important.
- Focus on high-weight categories. Improving a 30% category by 10 points has three times the impact of improving a 10% category by the same amount.
- Calculate your required final score early. Knowing you need a 95% on the final is better discovered weeks in advance than the night before.
- Don't ignore low-weight categories. They add up. A string of zeros in a 10% homework category can drop your grade by a full letter.
- Use the what-if mode. Try different final exam scores to see the range of possible outcomes. This helps you set realistic study goals.
- Verify with your instructor. Use this calculator as a guide, but confirm your official grade with your teacher or the course portal.