Weighted GPA calculation
A weighted GPA rewards harder courses with bonus grade points so that a student taking AP and IB classes is not penalised against someone taking easy electives. This calculator computes both your weighted GPA (which can exceed 4.0) and your unweighted GPA (capped at 4.0), credit-weighted across all your courses.
How it works
Each letter grade maps to a base grade point on the 4.0 scale. For passing grades, the tool adds a rigor bonus:
Regular +0.0
Honors +0.5
AP +1.0
IB +1.0So the weighted point for a course is basePoint + bonus (a failing grade gets no bonus and stays at 0.0). The weighted GPA is the credit-weighted average of those weighted points:
weightedGPA = sum((basePoint_i + bonus_i) * credits_i) / sum(credits_i)
unweightedGPA = sum(basePoint_i * credits_i) / sum(credits_i)Courses with no credits or no grade are skipped.
Tips and notes
- Many high schools cap the weighted scale at 5.0, which matches the +1.0 AP/IB bonus on an A.
- Some districts use different bonuses (for example +1.0 for Honors). If yours does, adjust the result mentally or use the unweighted figure as the comparable baseline.
- Most colleges recalculate GPA on their own scale, often unweighted, so always keep both numbers handy.
Why weighted GPA exists — and when it matters
The original problem
High school students who take the hardest available courses — AP US History, AP Calculus BC, IB Literature — bear more academic risk than students who fill their schedule with electives. An A in AP Chemistry is objectively harder to earn than an A in a standard elective, yet on an unweighted 4.0 scale both are worth exactly 4.0. Weighted GPA was introduced to give admissions committees a signal about course rigor that the unweighted average hides.
Why colleges often recalculate anyway
College admissions offices receive GPAs from thousands of high schools that all operate slightly differently. Some schools cap at 5.0; some use different bonus amounts; some weight only AP, not IB or Honors. To compare students fairly, many selective colleges recalculate every applicant’s GPA on their own unweighted or consistently weighted scale using the transcript’s course-by-course grades. This means your self-reported weighted GPA may differ from what the admissions office uses in evaluation.
The practical implication: when a college asks for your GPA, report both the weighted and unweighted figures and let the office apply their own methodology. This tool gives you both.
How to interpret your result
A weighted GPA between 4.0 and 5.0 means you are taking above-standard courses. The key signals are:
- Weighted GPA significantly above unweighted GPA — you are taking a rigorous course load. The gap shows course difficulty.
- Weighted and unweighted GPA nearly identical — either you have few or no AP/Honors courses, or you are earning lower grades in the advanced courses you do take.
- High unweighted GPA with a higher weighted GPA — the ideal signal for competitive admissions: hard courses, strong marks.
IB vs AP weighting
Most US schools treat IB and AP identically with a +1.0 bonus. In practice, the IB diploma program typically involves a smaller number of courses than the AP menu, and IB grading on a 1–7 scale must first be converted to letter grades. This tool applies the same +1.0 bonus to both AP and IB. If your school specifically treats IB differently, use the unweighted GPA as the comparable baseline when filling out applications.