It can add a common measure
Stanford can read an SAT or ACT beside students from very different high schools. The score may clarify academic preparation when the local transcript is unfamiliar, but its meaning still depends on course access and performance.
It cannot replace curriculum
Stanford’s review still centers sustained achievement, intellectual vitality and the opportunities available in the student’s school. Admissions readers can see whether the student pursued the strongest appropriate sequence; a composite does not manufacture missing preparation.
It can reveal a section imbalance
Stanford superscores the SAT and accepts the ACT superscore; ACT Science and Writing are optional. A section-level plan is therefore more useful than repeatedly chasing a round total without diagnosing the limiting skill.
It cannot predict admission
Class of 2028 score submitters reported a 1510–1570 SAT and 34–35 ACT middle 50%. The cohort contains admitted students, not a mechanical rule. Students below, inside and above a range can receive different decisions because the application is broader.
It can guide timing
Stanford accepts self-reported results and verifies them after enrollment. The useful final sitting must leave enough time for the route Stanford accepts and for the applicant to confirm that the checklist is complete.
It cannot freeze the policy
For Stanford, current first-year and transfer policy describes the verified scope. Testing policies, optional sections and reporting instructions can change; the application term must remain attached to every operational decision.