How to calculate gpa
GPA = Σ(grade points × credits) ÷ Σ credits Cumulative GPA = (prior GPA × prior credits + new quality points) ÷ combined credits
Worked example. Your GPA (4.0 scale): 3.48.
Example inputs — Letter grades: A, B+, A-, B; Credit hours, same order: 3, 4, 3, 3; Prior cumulative GPA: 0; Prior credit hours: 0. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Each letter grade is converted to grade points (A = 4.0, B = 3.0 and so on), multiplied by the course's credit hours, then the total is divided by total credit hours. Courses without a credit value count as 3 credits.
Assumptions & limitations
- Standard unweighted 4.0 scale.
- Courses missing a credit value count as 3 credits.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Does my school use the same scale?
Most US schools use this standard 4.0 scale, but some give A+ a 4.3 or skip minus grades. Check your school's handbook.
Are pass/fail classes included?
Usually not. Leave them out of the list.