The DAT Explained: Sections, Scoring, and Test Structure

What the DAT is

The Dental Admission Test (DAT) is a computer-based exam owned and administered by the American Dental Association (ADA). Dental schools in the United States use DAT scores as part of admissions, and select Canadian institutions accept it too.

The DAT measures general academic ability, scientific understanding, and perceptual reasoning — the last of which is unusual among admissions exams and closely tied to the spatial skills used in dentistry. It is delivered in English at Prometric test centers.

This guide covers how the test itself is built and scored. It is distinct from the dental-school application process (AADSAS) and prerequisite planning, which are covered separately.

The four sections

The DAT has four sections. The first, the Survey of the Natural Sciences, is a single 100-item section that combines three subjects — biology, general chemistry, and organic chemistry — into one timed block.

The Perceptual Ability Test (PAT) is the section that sets the DAT apart. Its 90 items test spatial and visual reasoning through problem types such as keyholes, angle discrimination, and paper folding. There is no equivalent on the MCAT or most other admissions exams.

Reading Comprehension (50 items) presents science-style passages and questions answerable from the passage alone, and Quantitative Reasoning (40 items) tests mathematical problem-solving. Confirm current item counts and any optional break on the official ADA DAT pages.

• Survey of the Natural Sciences — 100 items (biology, general chemistry, organic chemistry)
• Perceptual Ability Test (PAT) — 90 items (spatial/visual reasoning)
• Reading Comprehension — 50 items (passage-based)
• Quantitative Reasoning — 40 items (math problem-solving)

How the DAT is scored (the 1-30 scale)

DAT results are reported as standard scores on a scale from 1 to 30, not as raw correct-answer counts or percentages. On this scale, a score of about 19 typically signifies average performance on a national basis.

You receive individual standard scores for each science subject (biology, general chemistry, organic chemistry), plus Perceptual Ability, Reading Comprehension, and Quantitative Reasoning. Each is reported on the same 1-30 scale so schools can compare them consistently.

Because scores are equated standard scores rather than percentages, the same number represents the same level of ability across different test versions. There is no single passing score; each dental school weighs the sections according to its own criteria.

Academic Average and the 2025 Total Science change

The DAT reports two composite scores in addition to the individual sections: the Academic Average and the Total Science score. The Academic Average is the rounded average of your scale scores in biology, general chemistry, organic chemistry, quantitative reasoning, and reading comprehension (the Perceptual Ability Test is not included).

The Total Science score changed for administrations completed after March 1, 2025. It is now the rounded average of your scale scores in biology, general chemistry, and organic chemistry — a science-only composite. (Before that change, the Total Science score was based on performance in the Survey of Natural Sciences and was calculated differently.)

This is a genuine, recent methodology change, so older prep material may describe Total Science the old way. Rely on the current ADA DAT score-reporting pages for how composites are defined today.

Test length, format, and where it's offered

The DAT is a computer-based, multiple-choice exam delivered in English. Its total administration time is about five hours and 15 minutes, which includes an optional tutorial, the sections, and a scheduled break; only part of that time is scored content.

It is offered year-round by appointment at Prometric test centers in the US and its territories, and at select locations in Canada. You schedule it after applying through the ADA, rather than on a small number of fixed national dates.

Because the tutorial, break, and post-test survey affect how long you are actually seated, plan your test day around the full window. Verify the current structure and timing on the official ADA DAT pages.

Retaking the DAT and score validity

The ADA limits how often you can retake the DAT. Candidates must wait a set minimum period between attempts (commonly cited as 60 days — confirm the current figure on the official ADA site), and there are annual and lifetime limits on the number of administrations, with additional permission required after a set number of attempts.

Check the exact retest waiting periods and attempt limits on the official ADA site before scheduling a repeat, since these rules and any required approvals can change.

Dental schools generally accept DAT scores from a defined recent period, but each program sets its own validity window and its own view of multiple attempts. Confirm each school's policy on its official admissions page rather than assuming one rule applies everywhere.