Grade Average Calculator
Compute your weighted grade average, cumulative letter grade, and 4.0 scale GPA equivalent. Add custom assignments, quizzes, and exams dynamically.
| Total Weight Accounted | 100.0% |
| Unweighted Simple Average | 87.25% |
| Points to Next Letter (A-) | +2.65% needed |
| 4.0 Scale Grade Points | 3.33 / 4.00 |
How Weighted Grade Averages Work
In many middle school, high school, and university courses, not all assignments carry the same weight. A 10-question pop quiz does not impact your final semester mark as heavily as a 3-hour cumulative final examination.
In a weighted grading system, each assignment or category represents a specific percentage of your overall 100% course mark.
The Mathematics of Weighted Averages
Here are the mathematical formulas used to calculate weighted scores, normalized weights, and GPA points:
Total Accounted Weight = Sum of all Category Weights
Final Weighted Average (%) = (Sum of all Weighted Points / Total Accounted Weight) * 100
Unweighted Average (%) = Sum of all Grades / Number of Assignments
Target Final Exam Score (%) = (Target Final Grade - Current Grade * (1 - Final Weight)) / Final Weight
Step-by-Step Worked Calculation Example
Suppose you have the following grades and weights in a college psychology class:
- Homework: 92% (Weight: 20%) →
92 * 0.20 = 18.40 points - Midterm 1: 85% (Weight: 25%) →
85 * 0.25 = 21.25 points - Midterm 2: 78% (Weight: 25%) →
78 * 0.25 = 19.50 points - Final Paper: 94% (Weight: 30%) →
94 * 0.30 = 28.20 points
- Sum total weight:
20 + 25 + 25 + 30 = 100% - Sum weighted points:
18.40 + 21.25 + 19.50 + 28.20 = 87.35% - Look up standard letter scale: 87.35% = B+ (3.3 GPA)
Master Grade Percentage to GPA Conversion Table
Standard North American 4.0 GPA scale letter conversions and typical performance descriptions:
| Letter Grade | Percentage Range | 4.0 GPA Scale | Performance Level |
|---|---|---|---|
| A+ | 97.0% to 100% | 4.00 | Exceptional / Mastery |
| A | 93.0% to 96.9% | 4.00 | Excellent |
| A- | 90.0% to 92.9% | 3.70 | Superior |
| B+ | 87.0% to 89.9% | 3.30 | Very Good |
| B | 83.0% to 86.9% | 3.00 | Good / Above Average |
| B- | 80.0% to 82.9% | 2.70 | Competent |
| C+ | 77.0% to 79.9% | 2.30 | Average |
| C | 73.0% to 76.9% | 2.00 | Satisfactory |
| C- | 70.0% to 72.9% | 1.70 | Marginal Passing |
| D | 60.0% to 69.9% | 1.00 | Poor / Minimum Credit |
| F | Below 60.0% | 0.00 | Failing / No Credit |
How to Calculate What You Need on Your Final Exam
Students often wonder what exact score they need on their final exam to earn a specific overall letter grade in the course.
To calculate your target:
- Multiply your current grade by the portion of the grade already completed (e.g. 70% completed).
- Subtract that number from your target goal (e.g. 90% for an A).
- Divide the remaining points by the weight of your upcoming final exam (e.g. 30% or 0.30).
5 Strategies to Maximize Your Semester GPA
Frequently Asked Questions
Multiply each assignment grade percentage by its assigned weight, sum all the weighted points together, and divide by the total weight percentage. Formula: Weighted Grade = Sum(Grade * Weight) / Sum(Weight).
If some assignments have not occurred yet (for example, weights only total 70%), our calculator normalizes your grade by dividing total earned points by 70%, giving you your exact current running grade.
An unweighted GPA is measured on a standard 4.0 scale regardless of class difficulty. A weighted GPA awards extra points (up to 5.0) for rigorous Advanced Placement (AP), International Baccalaureate (IB), or Honors courses.
Yes. If your teacher offers bonus questions or extra credit assignments, your calculated percentage can exceed 100% (e.g. 104%), which still corresponds to an A+ or 4.0 on your academic transcript.
93% to 100% is a 4.0 (A), 90% to 92% is a 3.7 (A-), 87% to 89% is a 3.3 (B+), 83% to 86% is a 3.0 (B), 80% to 82% is a 2.7 (B-), 77% to 79% is a 2.3 (C+), 73% to 76% is a 2.0 (C), and below 60% is 0.0 (F).