How Academic Scoring Works
GPA is a credit-weighted average, not a plain one. Each letter grade maps to grade points (A = 4.0, B = 3.0), and each course's points are multiplied by its credit hours before averaging. This is why a poor grade in a four-credit course damages a GPA far more than the same grade in a one-credit elective — and why "I got one B" affects different students very differently. The cumulative calculator applies the same logic across semesters, which reveals the harder truth about GPA repair: as total credits accumulate, each new semester moves the average less. A first-year student can transform their GPA in a term; a final-year student mathematically cannot.
Weighted GPA is a different scale, deliberately. High schools credit course rigour by extending the scale — an A in an AP class may count as 5.0 rather than 4.0. That is why weighted GPAs above 4.0 exist and why they are not comparable to college GPAs, which are almost always unweighted on a strict 4.0 maximum. Our weighted tool handles AP, IB, Honors and Dual Enrollment because schools weight these categories differently, and applying a single blanket bonus would misrepresent most transcripts.
Standardised tests convert raw scores through a curve. The number of questions you answered correctly is a raw score; the reported score is a scaled one, and the mapping is set per administration to compensate for a harder or easier paper. That is why our SAT and ACT tools produce estimates rather than guarantees — the exact conversion table varies between test dates. The ACT composite adds another step: it averages the four section scores and rounds, which means half a point in one section can shift the composite by a full point.
AP scoring is a weighted composite, then a cut. Each AP exam combines multiple-choice and free-response into a composite score, and the College Board sets cut points that map composites onto the 1–5 grades. The weighting is not uniform — which is exactly why AP US History and AP English Language have their own calculators rather than sharing a generic one. A DBQ carries a different share of an APUSH composite than a rhetorical analysis essay does in AP Lang.
P-values quantify surprise, not truth. The p-value calculator returns the probability of seeing results at least as extreme as yours if the null hypothesis were true. The conventional 0.05 threshold is a convention, not a law of nature — and a p-value says nothing about effect size or practical importance. A trivially small difference can be significant with a large enough sample. Our tool visualises the distribution area precisely because the picture communicates what the decimal alone does not.