How each is calculated
The formula for both is the same: total quality points ÷ total credit hours. The difference is in what quality point value is assigned to each grade.
Unweighted GPA: Every course uses the same grade-point values — A=4.0, B=3.0, C=2.0, D=1.0, F=0 — regardless of course difficulty level.
Weighted GPA: Honors, AP, IB, and dual enrollment courses use a higher grade-point scale. The most common weighting adds 0.5 points to honors courses and 1.0 point to AP/IB courses. Some schools add 1.0 for honors and 1.5 for AP/IB.
Grade-point values compared
| Letter grade | Unweighted (all courses) | Weighted — Honors (+0.5) | Weighted — AP/IB (+1.0) |
|---|---|---|---|
| A / A+ | 4.0 | 4.5 | 5.0 |
| A− | 3.7 | 4.2 | 4.7 |
| B+ | 3.3 | 3.8 | 4.3 |
| B | 3.0 | 3.5 | 4.0 |
| B− | 2.7 | 3.2 | 3.7 |
| C+ | 2.3 | 2.8 | 3.3 |
| C | 2.0 | 2.5 | 3.0 |
A student who earns a B in an AP course receives 3.0 quality points per credit on an unweighted scale, but 4.0 quality points per credit on a weighted (AP +1.0) scale.
What colleges actually use
Because high schools use different weighting systems (or no weighting at all), colleges almost universally recalculate GPA on a standardized basis when reviewing applications. This recalculation typically:
- Strips all weighting and recalculates on a 4.0 unweighted scale
- May exclude elective courses like physical education, health, or certain arts courses — focusing on the "academic core" (English, math, science, social studies, world language)
- Allows the transcript to show course rigor (AP, IB, honors) as context alongside the recalculated GPA
College admissions counselors review both the GPA they calculate and the course rigor shown on the transcript. A student with a 3.5 unweighted GPA who took the most demanding courses available is viewed differently than a student with a 3.8 unweighted GPA in all standard-level courses. The curriculum context matters — which is why colleges want the transcript, not just the GPA.
Which GPA matters more for college applications
For college applications, the most important GPA is the one the college calculates — which you cannot control directly. What you control is:
- Your letter grades in each course
- The rigor of your course selections (number of AP/IB/honors courses available vs. taken)
- Consistency across all four years
Inflating your weighted GPA by taking AP courses you earn Cs in does not help your application. A C in AP Biology earns 3.0 quality points per credit weighted — the same as a B in a standard course unweighted. The course rigor is visible to admissions, but so is the grade. Selective colleges prefer consistent A/B performance in a challenging curriculum over low grades in maximum-difficulty courses.
Employers and GPA reporting
By the time students are applying for jobs, high school GPA is rarely relevant — employers who ask for GPA mean college GPA. College GPA is calculated on a single institution's scale and is unweighted by default (colleges do not use the AP/honors weighting system, because all college courses are graded on the same 4.0 scale).
When an employer asks for "your GPA," they mean your cumulative college GPA on the 4.0 scale as shown on your college transcript.