GPA Calculator
GPA compresses an entire semester of different-sized courses into one number by weighting each grade by how many credits it was worth — a 4.0 in a 1-credit seminar shouldn't count the same as a 4.0 in a 4-credit core class, and this is exactly why credits matter as much as grades.
Inputs
Result
3.6
How it works
GPA = Σ(grade points × credits) ÷ Σcredits
- 1GPA = 108 ÷ 30 = 3.6
How the gpa calculator works
GPA = total grade points ÷ total credit hours, where 'total grade points' is the sum of (grade point value × credits) for every course.
This weighting means a course worth more credits has proportionally more influence on the final GPA than a course worth fewer credits, even if both received the identical letter grade.
Worked example: 108 total grade points across 30 total credits
- GPA = 108 ÷ 30 = 3.6.
- This 108 figure itself would typically come from something like: a 4-credit course at a 4.0 grade point (16 points) plus a 3-credit course at 3.5 (10.5 points) plus other courses, all summed together before dividing by total credits.
Common mistakes to avoid
Averaging letter grades directly instead of weighting by credits
A 4.0 in a 1-credit course and a 2.0 in a 4-credit course don't average to 3.0 in a properly weighted GPA — the 4-credit course's lower grade pulls the true GPA down much closer to 2.0, because it carries four times the weight of grade points.
Mixing up 'total grade points' with 'total credits' when entering values
Grade points already reflect the credit-weighting from each course (grade value × that course's credits, summed) — entering the wrong figure in either field, or entering an already-averaged GPA where raw grade points are expected, throws off the whole calculation.
Frequently asked questions
Why does a higher-credit course affect GPA more than a lower-credit one?
Because GPA is a weighted average where credits are the weights — a 4-credit course contributes four times as many grade points to the total (for the same letter grade) as a 1-credit course does, so it has proportionally more pull on the final number.
How do I convert a letter grade to grade points?
Most institutions use a standard scale (commonly A=4.0, B=3.0, C=2.0, D=1.0, F=0), though the exact scale, and whether pluses/minuses adjust it slightly, varies by institution — check your specific school's official grading scale for precision.
Is GPA the same as percentage?
No — GPA is a points-based scale (typically 0-4.0) while percentage is 0-100. They're related through an institution's specific grading scale, but aren't directly interchangeable without knowing that scale.
How is GPA different from CGPA?
GPA typically refers to a single term or semester's average; CGPA (cumulative GPA) averages across multiple semesters or the entire academic history to date.
Learn more
How GPA Is Calculated
Credit-weighted averages explained with a worked transcript.
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