Grade Calculator Online Free Tool
Grade Calculator
Weighted Grade Calculator
Current Grade Results
Grade Breakdown
Grade Scale Reference
Quick Tip:
Switch between % and letter grades for each assignment
The grade calculator helps students and teachers quickly compute weighted course grades, see what score is needed on upcoming assignments, and convert between percentage grades and letter grades. Enter your assignment scores and weights to see your current grade and what you need on your final exam. Most courses assign different weights to homework, quizzes, midterms, and final exams, so a simple average of your scores will not give you the correct course grade.
Weighted Grade Calculation
Most courses weight different components differently: exams count more than homework, for example. A weighted average multiplies each score by its weight, sums the weighted scores, and divides by the sum of all weights. This gives greater influence to high-weight items. A 60% on a final exam worth 40% of your grade hurts your overall grade far more than a 60% on a homework assignment worth 5%.
Weighted Grade = Σ(Score × Weight) / Σ(Weight) Example: Homework 90% (weight 20%) + Midterm 75% (weight 35%) + Final 85% (weight 45%) = (90×20 + 75×35 + 85×45) / (20+35+45) = 8350/100 = 83.5%
Letter Grade Scale
Most American schools use a standard letter grade scale, though exact cutoffs vary by institution. The plus/minus system adds more granularity. Some schools use a 10-point scale (A = 90-100), others a 7-point scale (A = 93-100). Always check your syllabus for the exact grading scale your professor uses.
| Percentage | Letter Grade | GPA Points |
|---|---|---|
| 93-100% | 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 |
| 60-69% | D | 1.0 |
| Below 60% | F | 0.0 |
What Score Do You Need on the Final?
This is one of the most common grade questions at the end of a semester. The formula works backward from your target course grade, accounting for what you have already earned and how much the final exam is worth. If the required score comes out above 100%, passing with that target is mathematically impossible. If it comes out negative, you can skip the final and still pass (though that is rarely a good idea).
Required Final Score = (Target Grade - Current Grade × Current Weight) / Final Exam Weight Example: Target = 80%, Current score = 77% with 70% of grade done, Final = 30% Required = (80 - 77×0.70) / 0.30 = (80 - 53.9) / 0.30 = 87%
All percentages expressed as whole numbers (not decimals) in this formula.
Point-Based vs Percentage-Based Grading
Some professors grade on total points rather than category percentages. In a points-based system, your grade = total points earned / total points possible. A 95/100 quiz and a 47/50 homework both feed into the same running total. This system is simpler but makes it harder to know the relative importance of each assignment unless you track what fraction of the total each item represents.
Extra Credit and Grade Recovery
Extra credit adds points to your earned total without changing the total possible points, which makes its effect easy to calculate. If you have 850 points out of 1,000 possible (85%) and earn 20 extra credit points, your new grade is 870/1,000 = 87%. However, extra credit rarely moves a grade as much as students hope, especially late in the semester when the denominator is large.
Frequently Asked Questions
What grade do I need on my final exam to get a certain course grade?⌄
Use the required score formula: Required Final Score = (Target Grade - Current Grade × Current Weight) / Final Exam Weight. Example: you need a 75% in the course, currently have 70% with 60% of grade determined, and the final is 40% of the grade. Required = (75 - 70×0.6) / 0.4 = (75 - 42) / 0.4 = 82.5%. If the result exceeds 100%, the target grade is no longer reachable and you should recalculate with a lower target.
How do I calculate my grade if I don't know the weight of each assignment?⌄
If all assignments are weighted equally, add all scores and divide by the number of assignments. If you know the point value of each assignment, the weighted average equals total points earned divided by total points possible across all assignments. Most syllabi list either percentage weights by category or total point values for each assessment. Check your course syllabus or gradebook for this information.
Does a 0 on a missed assignment hurt more than a 50?⌄
Significantly yes. In a points-based course with 1,000 total points, a missed 100-point assignment scores 0, dragging your percentage down by 10 full points. A 50 on that same assignment only drops it by 5 points. The lesson: turning in partial work is almost always better than a zero. Even a low score on a late assignment (with a penalty) often outperforms a missed submission.
What is the difference between mean grade and weighted grade?⌄
Mean grade treats every item equally regardless of its point value or category weight. Weighted grade accounts for the relative importance of each item. In most university courses, the final exam is worth far more than any single quiz. If you average raw scores without weighting, you will overstate the importance of small assignments and understate the impact of major exams. Always use the weighted method for an accurate grade estimate.
What is grade curving and how does it work?⌄
Grade curving adjusts scores upward when an exam or assignment was harder than intended. The most common method is adding the same number of points to every student's score (additive curve). Another method scales all scores so the highest grade becomes 100% and others adjust proportionally. Some professors curve the final grade distribution so a certain percentage of students receive each letter grade. The specific method matters significantly, so always ask your professor how they curve.