How to Calculate Weighted GPA: AP, IB and Honors
A weighted GPA gives extra credit for harder courses. Honors, AP and IB classes add weight on top of the standard 4.0 scale, so the top of the scale becomes 5.0 (or higher at some schools).
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The most common system: Honors adds +0.5 and AP/IB adds +1.0 to each course’s grade points, capped at 5.0 per course. So an A in AP Biology = 4.0 + 1.0 = 5.0, while an A in a regular class = 4.0.
Step-by-step calculation
For each course: grade points + course weight, then multiply by credits. Add everything up and divide by total credits.
Example: A (4.0) in AP Biology (+1.0 weight) × 1 credit = 5.0 points. A- (3.7) in Honors Math (+0.5 weight) × 1 credit = 4.2. Total 9.2 ÷ 2 credits = 4.6 weighted GPA.
Why colleges use it
Weighted GPAs reward challenging coursework. Colleges often recalculate your GPA on their own scale anyway, so the weighted number on your transcript isn’t always what appears on the application.
Common pitfalls
- Not every school caps at 5.0 — some go higher, and some report weighted and unweighted separately.
- AP and IB may weigh differently at your school — check your own policy before relying on a calculator.
- A weighted GPA above 4.0 doesn’t mean perfect grades; it reflects course rigor.
See your numbers now with the weighted GPA calculator, or compare grading systems in the grading scales guide.