Grade Point Average (GPA) is a single number that compresses an entire academic record into one figure used by colleges, employers, and scholarship committees to compare candidates quickly. Understanding exactly how it is calculated — and the difference between weighted and unweighted versions — helps students make informed choices about course selection and understand where they stand.

The Unweighted GPA Formula

Unweighted GPA uses a 4.0 scale regardless of course difficulty. The grade-to-point conversion is standardised:

  • A / A+ = 4.0
  • A− = 3.7
  • B+ = 3.3
  • B = 3.0
  • B− = 2.7
  • C+ = 2.3
  • C = 2.0
  • D = 1.0
  • F = 0.0

The calculation is: GPA = Sum of (grade points × credit hours) ÷ Total credit hours

Example: Four courses — English (3 credits, A = 4.0), Math (4 credits, B+ = 3.3), History (3 credits, A− = 3.7), PE (1 credit, A = 4.0). Calculation: (3×4.0) + (4×3.3) + (3×3.7) + (1×4.0) = 12.0 + 13.2 + 11.1 + 4.0 = 40.3 quality points, divided by 11 total credits = 3.66 GPA.

How Weighted GPA Works

Weighted GPA adds bonus points for advanced coursework. The most common scale adds 0.5 points for honors courses and 1.0 point for AP (Advanced Placement) or IB (International Baccalaureate) courses, creating an effective ceiling above 4.0. A student earning an A in an AP course receives 5.0 quality points rather than 4.0. This rewards academic challenge rather than purely the grade itself.

The calculation is identical in structure to unweighted GPA, but uses the adjusted point values. Weighted GPAs above 4.0 are common at competitive high schools where most students take multiple AP courses.

Why the Distinction Matters for College Applications

Most US colleges recalculate submitted GPAs using their own formula when comparing applicants, often stripping away school-specific weighting to create a standardised comparison. A weighted 4.3 from one school and a weighted 4.3 from another may represent very different academic performance depending on how the schools weight their courses. Understanding this means that a student's self-reported GPA and the GPA a college admissions office uses for ranking may differ.

Use the USECALC GPA Calculator to compute your cumulative GPA by entering each course, grade, and credit hour count, with support for both weighted and unweighted scales.