What “weighted average” means in GPA
The phrase weighted average appears everywhere in grading, and it has a precise, simple meaning: an average in which some items count more than others. In a GPA, the “weight” on each course is its credit hours.
Plain average vs weighted average
A plain average adds your grades and divides by how many there are — every course counts equally. A weighted average multiplies each grade by its credits first, so a 4-credit course counts four times as much as a 1-credit course before dividing by the total credits. Your GPA is always the weighted version.
A worked example
Three courses: grade points 9 (4 credits), 7 (3 credits), 6 (1 credit). Plain average = (9 + 7 + 6) / 3 = 7.33. Weighted average = (9×4 + 7×3 + 6×1) / (4 + 3 + 1) = (36 + 21 + 6) / 8 = 63 / 8 = 7.875. The weighted figure is higher here because your best grade was in the heaviest course.
Why this is the right model
Weighting by credits makes the average reflect where your academic effort actually went. It is also what lets a single number summarise courses of very different sizes fairly. Every tool on this site uses it: the CGPA calculator, the cumulative calculator, and the SGPA to CGPA roll-up all weight by credits automatically.
Note that “weighted GPA” in the US sense means something additional — bonus points for honours/AP/IB rigour — which is a separate idea covered by the weighted GPA calculator. The credit weighting described here applies to all GPAs, weighted or not.
The two meanings of “weighted” — don't mix them up
This trips people up constantly. Credit weighting (bigger courses count more) applies to every GPA, always. The US sense of a “weighted GPA” means something extra: bonus points added for AP, IB, or honours rigour, which can push a GPA above 4.0. A transcript can be credit-weighted but unweighted in the US sense. When someone says “weighted,” check which they mean.
Key takeaways
- A weighted average lets some items count more — in a GPA, credits are the weights.
- Plain average divides by count; weighted average divides by total credits.
- Every GPA on this site is credit-weighted automatically.
- A US “weighted GPA” adds rigour bonuses — a separate idea.