Understanding GPA: Weighted, Unweighted, and What Colleges See
GPA — grade point average — is one of those numbers that follows students through high school, college, and sometimes beyond. It's simple on the surface (average of your grades, weighted by credits) but has enough variations that two students with the same "3.5 GPA" might not have equivalent academic records. Here's how it actually works.
The basic formula
Each letter grade corresponds to a numeric value:
- 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
Multiply each grade value by the credit hours of that course, sum the products, then divide by total credit hours. An A in a 3-credit course contributes 12 quality points; a B in a 1-credit course contributes 3.
Weighted vs. unweighted (high school)
In US high schools, "weighted GPA" gives extra points for advanced courses. An A in an AP or honors class might count as 5.0 instead of 4.0; a B might count as 4.0 instead of 3.0. This rewards students who take harder classes, and it's why a weighted GPA can exceed 4.0.
Unweighted GPA treats all courses equally, capping at 4.0. Colleges typically recalculate GPA using their own method — they'll look at the rigor of your schedule alongside the number, so a 4.2 weighted GPA with five AP classes is evaluated differently than a 4.2 with no APs.
College GPA
In college, GPA is usually calculated per semester (term GPA) and cumulatively (overall GPA). Graduate schools and employers usually care about the cumulative number, though many allow you to report your "major GPA" (only courses in your department). Medical and law schools recalculate GPA with their own rules — for example, AMCAS counts every attempt at a course, not just the highest grade.
Grade replacement and repeats
Policies differ by school. Some replace the original grade when you retake a course (grade replacement); others average both attempts into your GPA (grade averaging); a few allow a limited number of retroactive withdrawals. Before you retake a course to "fix" a GPA, check your school's policy — the two approaches produce very different outcomes.
What a GPA actually means
A 3.5 GPA is not the same at every school. Grade inflation has made averages creep up — the median GPA at some universities is above 3.5, while at others it's closer to 3.0. Employers know this and often weigh internships, projects, and recommendations more heavily than the raw number. GPA is a filter for some opportunities (graduate school, certain internships) but rarely the deciding factor for a job.
Raising a low GPA
The math is unforgiving for upperclassmen: after 60 credits, each new A shifts your cumulative GPA only slightly. Realistic strategies: focus on earning A's in your remaining courses, consider retaking one or two low-grade courses if your school allows replacement, and highlight upward trends in applications. A 3.2 with a strong senior year often impresses more than a flat 3.5 across four years.