Purdue GPA Calculator
Estimate your Purdue University semester GPA on the 4.0 scale — add each course's letter grade and credit hours for an instant result.
Your courses
Your Purdue GPA
Pick a grade and credits for at least one course to see your Purdue GPA.
How the Purdue GPA Calculator Works
Purdue University reports your performance as a grade point average on the 4.0 scale. Your GPA is a credit-weighted average, which means a grade in a 4-credit lecture counts more toward your GPA than the same grade in a 1-credit lab or recitation.
The math has three steps. First, each letter grade is converted to its Purdue grade point — an A or A+ is 4.0, an A- is 3.7, a B+ is 3.3, and so on down to an F at 0.0. Second, each grade point is multiplied by the course's credit hours to give the grade points earned. Third, the total grade points are divided by the total GPA-eligible credit hours.
GPA = Σ ( grade point × credit hours ) ÷ Σ ( credit hours )
Purdue uses a full plus/minus system, so selecting the exact grade matters — a B+ (3.3) and a B- (2.7) differ by 0.6 grade points per credit. Your official semester and cumulative GPA appear in MyPurdue; this tool is for estimating and planning before grades post.
Worked example
- CHM 115 — grade A (4.0), 4 credits → 16.0 points
- ENGL 106 — grade B+ (3.3), 3 credits → 9.9 points
- MA 161 — grade A- (3.7), 5 credits → 18.5 points
Total = 44.4 points over 12 credits → GPA = 3.70.
Purdue Grading Scale
Purdue's letter grades and their grade points on the 4.0 scale. Both A+ and A are worth 4.0.
| Grade | Grade points |
|---|---|
| A+ | 4.0 |
| A | 4.0 |
| A- | 3.7 |
| B+ | 3.3 |
| B | 3.0 |
| B- | 2.7 |
| C+ | 2.3 |
| C | 2.0 |
| C- | 1.7 |
| D+ | 1.3 |
| D | 1.0 |
| D- | 0.7 |
| F | 0.0 |
Frequently Asked Questions
How is GPA calculated at Purdue University?
Purdue calculates GPA on a 4.0 scale. Each letter grade becomes a grade point (A and A+ are both 4.0, B is 3.0, C is 2.0, and so on), that grade point is multiplied by the course's credit hours to give grade points earned, and the total is divided by the total GPA-eligible credit hours. For example, an A (4.0) in a 3-credit course and a B+ (3.3) in a 4-credit course give (12 + 13.2) = 25.2 points over 7 credits, for a GPA of 3.60. This calculator runs that exact credit-weighted formula as you type.
Is a Purdue A+ worth more than an A?
No. At Purdue, both an A+ and an A are worth 4.0 grade points, so an A+ does not raise your GPA above a perfect 4.0. The A+ is recorded on your transcript as recognition of outstanding work, but for GPA purposes it is mathematically identical to an A. This is the standard convention at most US universities. It means a transcript full of A+ grades produces the same 4.0 GPA as one full of A grades — the ceiling on Purdue's unweighted scale is 4.0.
Where do I find my GPA on MyPurdue?
Your official GPA appears in MyPurdue, Purdue's student portal, under your academic records — typically in the Grades or Academic Transcript section, where both your semester GPA and cumulative GPA are listed. This calculator is a planning tool: it lets you estimate your GPA before grades post, or model what-if scenarios for a current semester. For the figure that counts toward graduation, honors, and standing, always rely on the official number shown in MyPurdue or on your transcript.
What GPA do I need for Purdue's Dean's List or Semester Honors?
Purdue recognises strong semesters through Semester Honors and the Dean's List. Requirements are set by each college but generally call for a semester GPA around 3.5 or higher while carrying a minimum number of graded credit hours (often at least 15, with a portion graded A–F rather than pass/fail). Because the exact threshold and credit requirement vary between Purdue's colleges, check your college's specific policy. You can use this calculator to confirm whether your projected semester GPA clears the honors line.
Does a failed or repeated course affect my Purdue GPA?
An F counts as 0.0 grade points and is included in your GPA, so it lowers your average while still consuming credit hours attempted. Purdue offers a grade-replacement option for repeated courses under specific conditions, where the repeat grade can replace the original in the GPA calculation, though both attempts remain on the transcript. The rules are limited and college-specific, so confirm eligibility with your advisor. To see the effect, enter the repeat grade in this calculator in place of the original.
Does Purdue use plus and minus grades?
Yes. Purdue uses a plus/minus system, so grades such as A-, B+, B-, C+, C-, D+, and D- each carry their own grade point (for instance B+ is 3.3, B- is 2.7, and D- is 0.7). These intermediate grades give a more precise GPA than whole letters alone. Make sure you select the exact grade your instructor assigned in the calculator above, because the difference between, say, a B+ and a B- is 0.6 grade points per credit, which adds up across a full course load.