How to Calculate GPA
Understand the 4.0 scale, credit-weighting, weighted vs unweighted GPA, and work through a complete semester example from scratch.
- GPA formula
- 4.0 scale
- Weighted GPA
- Credit hours
In-depth how-to guides for understanding GPA, grade calculations, and academic planning. Each article is written by the Gradeculator team and kept up to date — last updated June 2026.
Understand the 4.0 scale, credit-weighting, weighted vs unweighted GPA, and work through a complete semester example from scratch.
Learn how category weights work in course grading, why weights don't need to sum to 100%, and how to track your grade mid-semester with incomplete data.
The real math behind GPA improvement — how much a semester of As actually moves your cumulative GPA, and which strategies (grade replacement, withdrawal timing, credit load) produce the biggest gains.
A complete reference for letter-to-percent-to-GPA conversions, why different schools set different cutoffs, what plus/minus grades mean numerically, and how to convert between all three systems.
These guides pair with Gradeculator's free tools. Use the guides to understand the concepts, then use the calculators to run your actual numbers.