How the gpa calculator works
GPA is a credit-weighted average of grade points. Each letter grade has a point value (A = 4.0, B = 3.0 and so on), which is multiplied by the course's credit hours to give quality points.
GPA = Total quality points ÷ Total credits
New cumulative = (Old GPA × old credits + semester points) ÷ all credits
This uses the common 4.0 scale with plus and minus grades (A− = 3.7, B+ = 3.3). Some schools count A+ as 4.33 or ignore plus and minus marks, and pass/fail courses usually do not count toward GPA. Weighted high-school GPAs may add a point for honors or AP courses; check your school's rules.
Worked example
A semester with an A in a 3-credit course, a B+ in a 4-credit lab, an A− in 3 credits and a B in 3 credits gives 12 + 13.2 + 11.1 + 9 = 45.3 quality points over 13 credits, a 3.48 GPA. If you already had a 3.20 GPA over 45 credits, your new cumulative GPA is (144 + 45.3) ÷ 58 = 3.26.
Frequently asked questions
How is GPA calculated?
Multiply each course's grade points by its credits, add them up and divide by total credits.
What is a good college GPA?
3.0 is often a minimum for honors and graduate programs; 3.5 and above is considered strong.
Do pass/fail courses affect GPA?
Usually not; they earn credit but no grade points.
What is the difference between weighted and unweighted GPA?
Unweighted uses the 4.0 scale for every class. Weighted adds extra points for honors, AP or IB courses.
Updated October 2026. Results are estimates for education, not financial or medical advice. All math runs in your browser; nothing you type is sent anywhere.