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US GPA Calculator
Standard 4.0 scale calculations for American high school and university students.
Understanding the US GPA System
Grade Point Average (GPA) is the standard measure of academic performance across US high schools, colleges, and universities. Unlike percentage-based systems, GPA converts your letter grades into numeric points on typically a 4.0 scale, then averages those points weighted by the credit hours of each course. This system allows for consistent comparison of student performance across different courses, even when those courses vary in difficulty or credit load.
The GPA formula is a credit-weighted average:
US GPA FormulaGPA = ฮฃ (Grade Points ร Credit Hours) รท ฮฃ (Credit Hours)
This means a 4-credit course with an A grade contributes more to your overall GPA than a 1-credit course with the same grade, since it's weighted by how many credit hours it carries.
The Standard 4.0 Grading Scale
| Letter Grade | Grade Point | Typical Percentage Range |
|---|---|---|
| A | 4.0 | 93โ100 |
| Aโ | 3.7 | 90โ92 |
| B+ | 3.3 | 87โ89 |
| B | 3.0 | 83โ86 |
| Bโ | 2.7 | 80โ82 |
| C+ | 2.3 | 77โ79 |
| C | 2.0 | 73โ76 |
| Cโ | 1.7 | 70โ72 |
| D+ | 1.3 | 67โ69 |
| D | 1.0 | 63โ66 |
| F | 0.0 | Below 63 |
Note: exact percentage boundaries can vary slightly between school districts and universities, so always check your institution's official grading policy.
A Worked Example
Suppose you took four courses this semester:
Course 1:3 credit hours, Grade A (4.0)
Course 2:4 credit hours, Grade B+ (3.3)
Course 3:3 credit hours, Grade Aโ (3.7)
Course 4:2 credit hours, Grade B (3.0)
Calculation of Grade Points: (3ร4.0) + (4ร3.3) + (3ร3.7) + (2ร3.0) = 12 + 13.2 + 11.1 + 6 = 42.3
Total credit hours: 3 + 4 + 3 + 2 = 12
Semester GPA ResultGPA = 42.3 รท 12 = 3.53
Weighted vs. Unweighted GPA
High school students often encounter a second layer of complexity: weighted GPA. In a weighted system, honors, AP, or IB courses are given extra grade points to reflect their added difficulty โ for example, an A in an AP course might be worth 5.0 instead of the standard 4.0. Unweighted GPA treats every course equally regardless of difficulty level. Colleges typically consider both when evaluating applications, since weighted GPA shows rigor while unweighted GPA offers a standardized comparison point across applicants from different schools.
Why GPA Matters Beyond Grades
GPA isn't just an academic report card figure โ it directly affects college admissions, scholarship eligibility, athletic eligibility under NCAA rules, and even some job applications that set a minimum GPA requirement for entry-level positions or internships. Many scholarship programs specifically require a minimum cumulative GPA (often 3.0 or 3.5) to maintain funding, making it worth tracking closely each semester.