Methodology
Where our predictions come from
We don't guess how much each part of your application counts. The factor weights come from NACAC's national survey of what colleges themselves say drives their decisions. We then calibrate those weights against admitted-student profiles from HYPSM and Top-20 universities in the 2026 cycle — and against our own founding team's results.
Our primary source: NACAC
The National Association for College Admission Counseling (NACAC), founded in 1937, is a nonprofit association of more than 28,000 admission officers, school counselors, and enrollment professionals worldwide — the professional body for the people who actually read applications and make admission decisions.
As part of its State of College Admission Report, NACAC asks its member four-year colleges how much weight they put on each factor in the admission decision. The most recent factor survey (Fall 2023 admission cycle, 185 colleges) is what our weighting is built on. It is about as close as you can get to admission officers, in aggregate, telling you what actually moves a decision.
The headline finding barely changes year to year: grades in college-prep courses and the strength of your curriculum outweigh everything else — test scores, essays, recommendations, extracurriculars, all of it.
What colleges say matters
Percentage of NACAC member four-year colleges attributing each level of importance to factors in admission decisions — first-time freshmen, Fall 2023 admission cycle.
| Factor | Considerable |
|---|---|
| High school grades in college prep courses | 76.8% |
| Total high school grades (all courses) | 74.1% |
| Strength of high school curriculum | 63.8% |
| Positive character attributes | 28.3% |
| Essay or writing sample | 18.9% |
| Counselor recommendation | 11.9% |
| Teacher recommendation | 10.8% |
| Extracurricular activities | 6.5% |
| Student's interest in attending | 15.7% |
| Work | 2.2% |
| High school class rank | 5.5% |
| Admission test scores (ACT, SAT) | 4.9% |
| Subject test scores (AP, IB) | 1.1% |
| Interview | 4.3% |
| Portfolio | 4.9% |
| State graduation exam scores | 1.6% |
Source: National Association for College Admission Counseling (NACAC), "Factors in the Admission Decision — State of College Admission Report." The weight signal collapses the four columns into one score (considerable counted fully, moderate half, limited a quarter).
How the table becomes our formulas
Academic index. Your academic index (0–100) blends weighted GPA and SAT/ACT. We didn't pick the split by feel — it drops straight out of the table. Grades and curriculum strength against admission tests lands at roughly 75% grades & rigor / 25% test scores.
Holistic read. The AI read scores five dimensions. Each one pools the NACAC factors it covers, and how much it counts toward your overall read is that pool's share of the table:
Grades in college-prep courses, all-course grades, curriculum strength, class rank, SAT/ACT, AP/IB and state exams
Positive character attributes, counselor and teacher recommendations
Extracurricular activities, work experience, portfolio
Student's demonstrated interest in attending, interview
Essay or writing sample
Chance estimates & reach/target/safety. We hold your academic index up against each school's selectivity to get a chance estimate and a reach/target/safety label. Same NACAC weighting behind it, whether you're looking at the chances predictor or the counselor's advice.
Calibrated on HYPSM & Top-20 admits, 2026 cycle
NACAC's survey spans four-year colleges at every selectivity level, and NACAC itself says factor importance shifts by institution type. We care about highly selective admissions, so we calibrate the NACAC-derived weights against admitted-student profiles from HYPSM (Harvard, Yale, Princeton, Stanford, MIT) and Top-20 universities in the 2026 cycle, plus our own founding team's results.
That's why our school baselines — average SAT/ACT and weighted GPA of admits, acceptance rates — track the current cycle. It's also why academics act as a gate at the top: at those schools near-perfect grades and rigor are just the price of entry, and it's character, essays, and a real extracurricular spike that separate the applicants who already cleared the bar.
Honest limits
- Predictions are estimates, not promises. No model can guarantee an admission outcome, and a real committee weighs context — a compelling backstory, a program's needs that year — that a simulator never sees.
- NACAC is an independent professional association. It is not affiliated with PredictAdmit and does not endorse this site. We just build on its published survey findings.
- School stats are approximate public figures for the 2026 cycle, used to make the simulation feel real.