GPA Calculator
Calculate your GPA on the 4.0 scale from grades and credit hours.
Formula
About this calculator
Your GPA isn't a simple average of your grades — it's a credit-weighted average, which is why a five-credit course affects it far more than a one-credit elective. This calculator does the weighting correctly: for each course you enter a letter grade and its credit hours, it converts the letter to grade points on the 4.0 scale, multiplies by the credits, sums everything, and divides by total credits.
The letter-to-points mapping follows the common US +/- scale: A and A+ are 4.0, A- is 3.7, B+ is 3.3, B is 3.0, and so on down to F at 0.0. Not every school uses pluses and minuses, and a few cap A+ at 4.0 while others allow 4.3 — check your institution's official scale if your transcript needs to match exactly.
Use it to project a semester GPA before grades post, to see how one more A would move your cumulative average, or to work out the grades you need this term to hit a scholarship or honors threshold. Add or remove course rows freely; the result updates the moment you change any grade or credit value.
To figure out the specific score you need on a final exam to reach a target course grade, use the final grade calculator instead — it solves the exam-score question directly.
Frequently asked questions
How is GPA calculated?
Each letter grade converts to grade points (A = 4.0, B = 3.0, etc.), which are multiplied by the course's credit hours. GPA is the sum of those weighted points divided by the total credit hours.
Does this use the plus/minus scale?
Yes. It uses the common scale where A- = 3.7, B+ = 3.3, B- = 2.7, and so on. If your school ignores pluses and minuses, just pick the base letter grade.
Can I calculate a cumulative GPA across semesters?
Yes. Enter every course from all terms with its credit hours, and the result is your cumulative GPA. For a single term, enter only that term's courses.