Weighted GPA Calculator

How the weighted GPA calculator works

A weighted GPA is a credit-weighted average of grade points, with an extra bonus added to harder coursework. The arithmetic is straightforward: every letter grade maps to a number on the 4.0 scale (A = 4.0, B = 3.0, C = 2.0, and so on), then each course contributes its grade points multiplied by its credit hours. Sum those products, divide by total credits, and you have your GPA.

The "weighted" part adds a fixed bonus to Honors, AP, and IB courses — typically +0.5 for Honors and +1.0 for AP/IB under the College Board's common convention. A B in AP Biology, then, is treated as 4.0 rather than 3.0, reflecting the heavier workload and college-level content. The effect is that a student taking rigorous courses is not penalised by the numbers for attempting harder material.

The formula, written out

For each course, compute (grade points + weight bonus) × credit hours. Sum those values across every course to get total quality points. Divide total quality points by total credit hours. That quotient is your weighted GPA. If you took five 3-credit classes, three regular and two AP, and earned B, A, A, B, A, the math looks like this:

• Regular B (3.0) × 3 = 9.0
• Regular A (4.0) × 3 = 12.0
• Regular A (4.0) × 3 = 12.0
• AP B (3.0 + 1.0 = 4.0) × 3 = 12.0
• AP A (4.0 + 1.0 = 5.0) × 3 = 15.0

Total quality points = 60.0. Total credits = 15. Weighted GPA = 60.0 ÷ 15 = 4.0. The same grades on an unweighted scale would average 3.6 — the two AP bonuses pulled the number up by 0.4.

Which scale does this tool use?

This calculator uses the most common US high school convention: a 4.0 base scale, +0.5 for Honors, and +1.0 for AP or IB. The result can reach 5.0 in the ceiling case (straight A's in all AP/IB courses). Some schools use slightly different conventions — a 4.33 top for A+, a cap at 4.5 rather than 5.0, or weighting only AP and not Honors. If your school's handbook specifies something different, treat this calculator's output as a close approximation rather than a match.

Weighted vs unweighted — which matters more?

Both numbers tell different stories. Unweighted GPA is a direct measure of how well you performed against the grading scale, with no adjustment for course difficulty. Weighted GPA bundles performance and rigour into a single figure. College admissions offices usually want to see both, and many of them recalculate GPA on their own internal scale — often stripping weighting, or applying a house-specific weighting that differs from your high school's.

The practical takeaway: a weighted GPA alone is an incomplete signal. A 4.5 weighted GPA from a transcript full of AP courses is more competitive than a 4.5 from a transcript with only one or two. Admissions readers see the course list alongside the number, which is why selective colleges talk about "rigor of curriculum" as a distinct factor.

Common mistakes when calculating weighted GPA

• Averaging course GPAs instead of credit-weighting them. A 4-credit A and a 1-credit F do not average out to a 2.0 — the A pulls far more weight, and the correct credit-weighted GPA is around 3.2.
• Counting AP Exam scores as grade points. Your AP Exam score (1–5) is a separate number from the letter grade you earn in the course. Only the letter grade — and the AP weighting on that grade — affects your GPA.
• Forgetting to convert plus/minus grades. A B+ is 3.3, not 3.0. An A- is 3.7, not 4.0. This calculator handles the full +/− scale; do not round to whole-letter grades before entering.
• Including Pass/Fail courses. Pass/Fail courses typically do not affect GPA at all. Omit them from the calculator.

What this calculator is not

This is an arithmetic tool. It cannot predict your college GPA, judge whether your transcript is competitive for a specific school, or tell you how admissions committees will evaluate your course selection. For college-specific recalculation, check each school's admissions page — many universities publish the exact scale they use.