Exams & Scores Calculators

These calculators sit on top of weighted averages and published conversion tables — the same two pieces of arithmetic in different wrappers. "What do I need on my final" is a weighted average solved for the final's score. "What's my weighted exam grade" is a weighted average evaluated forward. SAT-ACT concordance is a percentile-to-percentile crosswalk, not a point-for-point swap. AP scoring is a composite of two weighted sections run through an annual equating step so the same "4" means roughly the same thing year to year. Most of these tables and weights are published annually or updated on a known schedule; the calculators are pinned to the most recent published year, and we flag the year on each page so you can check whether the reference has moved.

How to use these tools

Weighted exam math is always the same formula — the weights are what change from syllabus to syllabus, so pull out your course outline first.
The SAT-ACT concordance table maps percentile ranks, not scaled scores; a 1450 SAT and a 33 ACT sit near the same percentile but are not arithmetically equivalent.
AP cutoffs shift each year because of equating; predictors work from the most recently published cutoffs and carry roughly ±1 point of uncertainty.
If a required score comes out above 100, the calculator is telling you the grade isn't mathematically reachable on the current syllabus — not that you should study harder.

ACT to SAT Converter

Convert an ACT composite (1–36) to an equivalent SAT total score (400–1600) using the official College Board 2018 concordance.

AP Exam Score Predictor

Estimate your 1–5 AP exam score from raw multiple-choice and free-response performance. Uses published composite bands; cutoffs shift each year.

Grade Curve Calculator

Apply common curving methods — flat-point, square-root, or top-score peg — to a raw exam grade. See the curved result next to the raw score.

Weighted Exam Average Calculator

Weighted average of multiple exam scores, each at its own weight. Useful when midterms and finals carry different shares of the course grade.

Final Exam Grade Needed Calculator

Figure out exactly what score you need on your final exam to hit a target course grade. Enter your current grade, target grade, and the final's weight.

SAT to ACT Converter

Convert a total SAT score (400–1600) to an equivalent ACT composite (1–36) using the official College Board 2018 concordance table.

Test Score Drop Calculator

See how much your average improves when your lowest test score is dropped. Enter all your scores to compare with-drop and without-drop averages.

Guides & articles

Apr 12, 2026

SAT to ACT concordance: how the College Board conversion table works

The official 2018 concordance table is a percentile-rank crosswalk, not a direct score swap. Why that distinction matters for application strategy.

Apr 4, 2026

The math behind "what do I need on my final?"

One straightforward weighted-average formula answers the single most-searched grade question in America every December and May.

Mar 24, 2026

How AP exam scoring works: composite scores, score bands, and why predictions wobble

AP exams run on a weighted composite of multiple-choice and free-response sections, with cutoffs that shift each year. Here is how the math lines up.

A couple of closing points worth keeping in mind. Concordance tables and AP cutoffs are empirical, rebuilt from real student performance each year, and they move — sometimes by a point or two, occasionally more when a test is redesigned. Calculators on this site are pinned to the most recent published reference, and every page flags the year of the table it's using. If you're reading this more than a year after the publish date, sanity-check against the current published table before acting on the result. The math doesn't change; the inputs do.