sat-score-projection

Estimate a digital SAT total scaled score (400–1600) from the number of raw correct answers in the Reading & Writing and Math sections. Pure, dependency-free Rust math — the same engine behind the ExamScoreCalc score projector.

Important: this is an estimate, not a prediction

The digital SAT is section-adaptive: the difficulty (and scoring weight) of each section's second module depends on first-module performance. The College Board does not publish exact raw-to-scaled conversion tables, so there is no single deterministic mapping from "questions correct" to a scaled score — the same raw count can yield different scaled scores depending on module routing.

This crate uses a deliberately transparent linear model that approximates the published score scale (each section 200–800; total 400–1600) across the full raw range. It is meant for orientation and "what-if" planning, not as a prediction of any individual's official score. Treat every output as ± a few tens of points.

Usage

use sat_score_projection::{section_score, digital_sat_total};

let rw   = section_score(40, 54);          // ~40 of 54 Reading & Writing correct
let math = section_score(30, 44);          // ~30 of 44 Math correct
let total = digital_sat_total(40, 30);     // total 400–1600 estimate

assert!((200.0..=800.0).contains(&rw));
assert!((400.0..=1600.0).contains(&total));

Live calculator

For an interactive version with the standard digital-SAT item counts built in, see the SAT score projector at ExamScoreCalc.

License: MIT