Although a GPA (cumulative grade point average) boils down to a single figure, calculating it accurately requires properly accounting for every course. This GPA calculator performs the calculation instantly: simply enter the grade and the number of credits for each course, and the tool calculates your overall average on the standard 4.0 scale. Whether you want to evaluate your current results, plan for the upcoming semester, or verify a figure before including it in an admissions application, this page explains the calculation step-by-step.
How the GPA Calculator Works
A GPA calculator relies on a three-step formula: first, the grade (in letter form) for each course is converted into a numerical value; this value is multiplied by the course’s credit count; finally, the resulting total is divided by the sum of all credits.
- Points earned = Numerical grade value × Credits (for each course)
- Total points = Sum of points earned across all courses
- GPA = Total points ÷ Total number of credits
Example: A 3-credit course with a grade of A (4.0) equals 12 points. Add this value to the points earned in your other courses, divide the result by the total number of credits taken, and you will have your GPA.
Standard GPA scale (4.0 system)
Most U.S. institutions use this grading scale, although slight variations may exist. Therefore, if you need an exact value, it is recommended that you consult your institution’s official scale to verify:
- A / 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
GPA calculation example: three courses
Below is a step-by-step explanation based on the standard example used by this GPA calculator:
- Course 1: A (4.0) × 3 credits (credit hours) = 12.0 points
- Course 2: B+ (3.3) × 4 credits (credit hours) = 13.2 points
- Course 3: A- (3.7) × 3 credits (credit hours) = 11.1 points
Total points: 12.0 + 13.2 + 11.1 = 36.3. Total credits: 3 + 4 + 3 = 10. GPA = 36.3 ÷ 10 = 3.63.
Weighted vs. Unweighted GPA
With an unweighted GPA, all courses are treated equally; the maximum grade is 4.0, regardless of the course’s difficulty level. A weighted GPA factors in extra points for more demanding courses (such as Honors, AP, or IB)—often 0.5 points for Honors and 1.0 point for AP or IB—allowing the GPA to exceed 4.0. This GPA calculator is based on the standard unweighted 4.0 scale. If your school uses a weighted GPA, consult your guidance counselor or the registrar’s office to understand the specific weighting system, as it can vary between schools or even between individual courses.
Cumulative GPA vs. Semester GPA
A semester GPA considers only the courses taken during a single semester, whereas an overall GPA (or “cumulative GPA”) encompasses all courses taken throughout your entire program of study or academic career. Transcripts, scholarships, and higher education applications almost always rely on the overall GPA, as it reflects your complete academic record rather than just the results from a specific semester. To calculate your overall GPA, include all courses from every semester in the calculation described above; this calculator processes the data the same way, whether you enter results for a single semester or for your entire academic history to date.
High School vs. College GPA Calculator
Although the fundamental calculation method is identical for high school and college, the specific approaches differ. High school GPA calculations often factor in the weighting of advanced-level subjects—such as “Honors” or AP (Advanced Placement) courses—leading some schools to use a 5.0 scale instead of the standard 4.0 scale. In contrast, college GPAs are almost always unweighted and based on the standard 4.0 scale, while accounting for significant variations in the number of credits per course (e.g., one credit for a lab session versus four credits for a lecture)—unlike the more uniform credit structure found in high schools.
GPA can also affect eligibility for financial aid; most institutions require a minimum GPA to meet the “Satisfactory Academic Progress” standards necessary to qualify for public grants. For further information on this topic, please consult the Federal Student Aid office directly.
If your school reports grades as percentages before converting them to letters, our percentage calculator can help you work out the raw percentage score behind any grade before you plug it into the GPA formula above.
How do I calculate my Grade Point Average (GPA)?
Multiply the grade for each subject by the corresponding number of credits, sum these values, and divide the result by the total number of credits. This GPA calculator performs the calculation automatically once you have entered your subjects.
What is considered a good GPA?
A GPA of 3.0 (equivalent to a B grade) is generally considered good; 3.5 or higher is very good; and between 3.7 and 4.0 is excellent. However, the definition of “good” may vary depending on the institution and the program of study.
What is the difference between a weighted and an unweighted GPA?
An unweighted GPA has a maximum limit of 4.0, regardless of the difficulty of the subjects. With a weighted GPA, extra points are assigned to more demanding subjects (e.g., Honors, AP, or IB), allowing the average to exceed 4.0.
Are all subjects taken included in the GPA?
The cumulative GPA (overall average) includes all subjects relevant to earning the degree. The semester GPA only takes into account the subjects from the current semester.
Can I improve my GPA?
Yes: taking courses with more credit hours and earning good grades has a greater impact than the same grades in lower-credit courses, since GPA is weighted by credit hours, not the number of courses taken.