An unweighted GPA measures your grades on a standard 4.0 scale, treating every class the same regardless of difficulty. A weighted GPA adds extra points for harder courses like AP, IB, and honors classes, pushing the scale above 4.0 and sometimes as high as 5.0. Both numbers appear on high school transcripts, and colleges look at them differently depending on the school.
How the Unweighted GPA Works
An unweighted GPA converts your letter grades into numbers on a 4.0 scale: an A equals 4.0, a B equals 3.0, a C equals 2.0, and so on. Those numbers are averaged across all your classes. Every course counts the same, whether it’s a standard-level English class or AP Chemistry. A student who earns straight A’s in every class will have a 4.0 unweighted GPA no matter what level those classes are.
This simplicity is both the strength and the limitation. Unweighted GPA gives a clean snapshot of your grades, but it doesn’t show whether you challenged yourself with advanced coursework. Two students can both have a 3.8 unweighted GPA while taking very different course loads.
How the Weighted GPA Works
A weighted GPA uses the same base scale but adds extra points for courses classified as more rigorous. Most high schools add 0.5 points for honors classes and a full 1.0 point for AP and IB classes. So an A in a regular class is still worth 4.0, but an A in an honors class becomes 4.5, and an A in an AP or IB class becomes 5.0.
Here’s how that looks across common letter grades:
- A (regular / honors / AP or IB): 4.0 / 4.5 / 5.0
- B (regular / honors / AP or IB): 3.0 / 3.5 / 4.0
- C (regular / honors / AP or IB): 2.0 / 2.5 / 3.0
The plus and minus grades follow the same pattern. A B+ in a regular class is 3.3, in honors it’s 3.8, and in an AP class it’s 4.3. This means a student taking several AP and honors courses can end up with a weighted GPA well above 4.0, even with a few B’s mixed in.
One important detail: the extra weight only applies to grades above an F. Failing an AP class still earns 0.0 points, just like failing any other course.
A Quick Example
Imagine you take five classes in a semester and earn these grades: A in AP History, A in Honors English, B in AP Biology, A in regular Math, and B in regular Art. Your unweighted GPA would average out to 3.6 (two B’s pulling the average down from 4.0). Your weighted GPA, though, would be higher. The AP History A counts as 5.0, the Honors English A counts as 4.5, the AP Biology B counts as 4.0, regular Math stays at 4.0, and regular Art stays at 3.0. That averages to 4.1, reflecting the difficulty of your schedule.
Why Both Numbers Matter
Weighted GPAs are more commonly used to calculate class rank. Because they reward students who take harder courses, they tend to push those students higher in the rankings. If your school reports class rank on your transcript, it’s likely based on weighted GPA.
Unweighted GPA, on the other hand, gives colleges and scholarship committees a baseline measure they can compare across schools. Not every high school weights grades the same way, and some schools offer far more AP and honors classes than others. A 4.7 weighted GPA at a school with 30 AP offerings means something different than a 4.7 at a school with five.
When you fill out college or scholarship applications, you’ll sometimes be asked for one or the other. If the application doesn’t specify, listing your weighted GPA is the safer default since it will be the higher number. Selection committees reviewing your application will also look at which courses you took. A 4.0 unweighted GPA earned entirely in AP and honors classes tells a very different story than a 4.0 earned in standard-level courses.
How Colleges Actually Use Your GPA
Many colleges don’t simply take your reported GPA at face value. Admissions offices frequently recalculate GPAs using their own system so they can compare applicants on equal footing. Some strip out non-academic classes like PE, art, or music and only count core academic subjects. Others ignore freshman-year grades entirely or only look at grades through junior year.
The specific methods vary widely. Some large university systems recalculate on an unweighted 4.0 scale, ignoring plus and minus distinctions and treating a B+ the same as a B. Others cap the number of extra points you can earn from advanced courses. Some highly selective colleges skip the GPA number altogether and read your transcript line by line, evaluating your performance in each individual class alongside the rigor available at your school.
When your high school sends your transcript, it typically includes a school profile. This document tells admissions officers how your school’s grading system works, which classes count toward the GPA, and what advanced courses are offered. That context helps colleges interpret your numbers fairly, especially when comparing you to students from very different schools.
Which GPA Should You Focus On?
You don’t really choose one over the other. Both are calculated from the same transcript, and both will be visible to colleges. What you can control is the underlying grades and the difficulty of your course load. Taking more challenging classes can boost your weighted GPA even if your grades dip slightly from what you’d earn in standard classes. A B in AP Biology (worth 4.0 weighted) actually contributes more to your weighted GPA than an A in a regular elective (worth 4.0 weighted as well), and it signals academic ambition to admissions reviewers.
That said, grades still matter. Overloading on AP courses and earning C’s will hurt both your weighted and unweighted GPA. The strongest transcripts generally show a student who took rigorous courses where they were available and performed well in them. Colleges are looking for that balance between challenge and achievement, and both GPA numbers help tell that story.