Grade Calculator — Weighted Average & Letter Grade
Enter your assignments, exams, or projects with scores and weights to instantly calculate your weighted average grade. The calculator shows your overall percentage, letter grade (A+ through F), GPA equivalent on a 4.0 scale, and total points earned versus points possible. Adjust weights to reflect how much each assignment counts toward your final grade.
| Assignment Name | Score | Max Score | Weight | |
|---|---|---|---|---|
Add assignments above to calculate your grade.
How it works
How weighted grades work
A weighted grade gives each assignment or exam a different level of importance toward your final grade. Instead of treating a 10-point quiz and a 200-point final exam equally, weights let you reflect the true contribution of each item. The formula is: Weighted Average = Σ(score/maxScore × weight) / Σ(weight) × 100%. For example, if your midterm (weight 2) and final (weight 3) contribute differently, a 90% on the final matters more than a 90% on the midterm.
When all weights are equal to 1, the weighted average equals the simple average — every item counts the same. Instructors commonly weight categories differently: homework might be 20%, quizzes 20%, midterms 30%, and the final exam 30%. Enter those percentages directly as weights, or use proportional numbers such as 2, 2, 3, 3. The ratio between weights is what matters, not their absolute values.
Letter grades and the 4.0 GPA scale
Most U.S. colleges and universities use a letter grade system tied to a 4.0 GPA scale. An A+ or A corresponds to 4.0, an A- to 3.7, a B+ to 3.3, a B to 3.0, and so on down to F at 0.0. The percentage cutoffs used by this calculator (A ≥93%, B ≥83%, C ≥73%, D ≥63%) represent common academic standards, though individual institutions and instructors may set different thresholds.
Your cumulative GPA is not simply the average of your course GPAs — it is weighted by the number of credit hours each course carries. A 4-credit calculus course has more impact on your GPA than a 1-credit seminar. Use this calculator to estimate the GPA contribution of individual courses, and a dedicated cumulative GPA calculator to aggregate across semesters.
Strategies for improving your grade
Focus your effort where it has the highest return. If your final exam carries 40% of the course grade and you have a 75% average going in, a strong final can still lift your overall grade significantly. Use the calculator to run what-if scenarios: enter your projected final exam score and see what overall percentage and letter grade it produces.
When approaching the end of a term, determine the minimum score you need on remaining assessments to reach your target grade. Work backwards from the desired weighted average: Target = (current weighted sum + needed score × remaining weight) / total weight. Knowing exactly what score you need removes uncertainty and lets you allocate study time strategically across all your courses.
Frequently asked questions
›What is the difference between a weighted and unweighted grade?
An unweighted (simple) grade treats every assignment equally — it divides total points earned by total points possible. A weighted grade assigns different levels of importance to different assignments. For example, if your final exam is worth 40% of your grade and a quiz is worth 5%, the final has eight times more impact on your average. This calculator shows both so you can see how weighting affects the result.
›How do I enter weights from my syllabus?
If your syllabus says homework = 20%, quizzes = 20%, midterm = 30%, final = 30%, you can enter those percentages directly as weights (20, 20, 30, 30) or their decimal equivalents (0.2, 0.2, 0.3, 0.3). You can also group multiple assignments into one row — average the scores and use the category weight. The calculator normalizes weights automatically, so only the ratios between them matter.
›What percentage is needed for each letter grade?
This calculator uses common U.S. academic cutoffs: A+ ≥97%, A ≥93%, A- ≥90%, B+ ≥87%, B ≥83%, B- ≥80%, C+ ≥77%, C ≥73%, C- ≥70%, D+ ≥67%, D ≥63%, D- ≥60%, F below 60%. Your school or instructor may use slightly different thresholds — check your syllabus to confirm.
›What is a 4.0 GPA?
A 4.0 GPA is the highest grade on the standard U.S. college 4.0 scale and corresponds to an A or A+ grade (≥93%). The scale assigns numerical values to letter grades: A/A+=4.0, A-=3.7, B+=3.3, B=3.0, B-=2.7, C+=2.3, C=2.0, C-=1.7, D+=1.3, D=1.0, D-=0.7, F=0.0. A 3.0 GPA is a B average and is often required for graduate school eligibility, scholarships, or honors programs.
›Can I calculate what score I need on my final exam?
Yes — use the calculator to work backwards. Enter all your completed assignments with their actual scores and weights. Add a row for the final exam with your target score. Adjust the final exam score up and down until the weighted average reaches your desired grade. Alternatively, the minimum final score needed = (target average × total weight − current weighted sum) / final weight × max final score.
›Why does the weighted average differ from the simple average?
The weighted average factors in how much each item counts. If you scored 95% on a low-weight quiz and 70% on a high-weight final, your weighted average will be pulled toward 70%. The simple average adds all scores and divides by the number of items, ignoring how much each item is worth. When weights differ significantly, the two averages can diverge by several percentage points.
›How are extra credit scores handled?
Enter the extra credit assignment with its actual score and maximum possible score. If the extra credit is worth 5 bonus points on a 100-point scale, enter score = 5, max = 100, weight = the appropriate weight. If extra credit can push your score above 100%, the calculator will reflect that. Some instructors add extra credit points directly to the total earned — in that case, add those points to the numerator of the relevant row.
›Does this calculator work for graduate school courses?
Yes. Graduate grading scales often use fewer letters (A, B, C, F) with a minimum passing grade of B. Enter your scores and weights exactly as you would for undergraduate courses. Note that many graduate programs require a 3.0 GPA minimum to remain in good standing, and a B- or below in a required course may need to be retaken. Check your program's specific grading policies for exact thresholds.
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