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Weighted vs. Unweighted GPA: What's the Real Difference?

Published September 21, 2026

If your school offers Honors or AP classes, you've probably seen two different GPA numbers floating around and they can look surprisingly far apart. Here's exactly what separates them, and why both numbers matter.

Unweighted GPA: the same scale for every class

An unweighted GPA treats every course identically, regardless of how difficult it was. A 4.0 is the maximum, an A is always worth 4.0 points, a B is always worth 3.0, and so on whether that A came from a standard English class or an AP Physics class.

Weighted GPA: harder classes count for more

A weighted GPA adjusts for course difficulty. Most US high schools add one extra point for Honors and AP (or IB) classes, so an A in an AP class is worth 5.0 instead of 4.0. This means a student who takes on harder classes can end up with a GPA above 4.0 something that's mathematically impossible on the unweighted scale.

A quick example

Say a student takes five classes: three regular classes with a B average, and two AP classes with an A average.

  • Unweighted: (3 × 3.0 + 2 × 4.0) ÷ 5 = 3.4
  • Weighted: (3 × 3.0 + 2 × 5.0) ÷ 5 = 3.8

Same grades, same classes a 0.4 point difference just from how the GPA is calculated. This is exactly what the GPA calculator on this site shows when you toggle "Weighted GPA" on and off.

So which one do colleges look at?

Both, usually. Many colleges see your unweighted GPA, your weighted GPA, and your full transcript and some recalculate GPA entirely using their own formula, which might weight things differently than your school does. The safest approach is to know both of your numbers rather than assume only one matters.

The takeaway

Neither number is "more correct" than the other they answer different questions. Unweighted GPA tells you your raw average. Weighted GPA gives credit for taking on harder coursework. If your school reports both, it's worth tracking both throughout high school rather than finding out the difference for the first time during college application season.