GPA Calculator

We cannot guarantee the accuracy of your calculations if you do not have the assistance of your Academic Advisor.  If you are retaking a course, you may want to use this GPA calculator.

Part 1. How to calculate your Semester or Graduation Index.

  • Add up the number of hours of A+, A, A-, B+, B, B-, C+, C, C-, D+, D, D-, and F that you have earned.
  • Place totals in the appropriate boxes below.
  • Grades of P, N, and I are not used in the calculation.
  • Grades of WF are not included in the GPA calculation.
  • If a course has been repeated, use only the second enrollment information in the calculation.
  • Click the submit button and the calculator will calculate the values for you.
Credits of A+ X 4 = Points
Credits of A X 4 = Points
Credits of A- X 3.7 = Points
Credits of B+ X 3.3 = Points
Credits of B X 3 = Points
Credits of B- X 2.7 = Points
Credits of C+ X 2.3 = Points
Credits of C X 2 = Points
Credits of C- X 1.7 = Points
Credits of D+ X 1.3 = Points
Credits of D X 1 = Points
Credits of D- X 0.7 = Points
Credits of F X 0 = Points
Total Credits Total Points GPA

Part 2. How to calculate the Semester Index necessary to change your Graduation Index to a desired value.

  • Use this to calculate how your graduation index will change based on the semester index you receive.
  • You will need to know how many hours and points you have before this semester's grades are added to your graduation index. You can calculate those in part 1 or in some cases you can read them off your most recent grade card.
  • A grade in a second enrollment in a class replaces the grade and credits of the first enrollment in the class when calculating graduation index.

Desired Graduation Index
Graduation Hours earned
Current Enrollment - number of hours
Graduation Index Points earned


Required Semester Index

Part 3. How will this semester's index change my Graduation Index?

Graduation Hours earned
Current Graduation Index

Current Enrollment - number of hours
Estimated Semester Index


New Graduation Index


Purdue University College of Science, 150 N. University St, West Lafayette, IN 47907 • Phone: (765) 494-1729, Fax: (765) 494-1736

Student Advising Office: (765) 494-1771, Fax: (765) 496-3015 • Science IT, (765) 494-4488

© 2015 Purdue University | An equal access/equal opportunity university | Copyright Complaints

Trouble with this page? Disability-related accessibility issue? Please contact the College of Science Webmaster.