What Is the DAT? Sections, Timing, and Scoring

The Dental Admission Test (DAT) is the admission exam for dental school, and it has four sections: Survey of the Natural Sciences, Perceptual Ability, Reading Comprehension, and Quantitative Reasoning. You answer 280 multiple-choice questions across five hours and 15 minutes of total appointment time, and every score is reported on a 200 to 600 scale.

It is accepted by all U.S. dental schools and select Canadian schools, and it is offered year round at Prometric centers, per the ADA DAT program page. This guide breaks down each section, the real test day timeline, and how the scoring works.

If you want to turn that section mix into an actual weekly schedule, use our DAT study plan generator.

Key takeaways

• The DAT has 4 sections and 280 multiple-choice questions, with 4 hours and 15 minutes of scored testing time inside a 5 hour 15 minute appointment.
• Survey of the Natural Sciences: 100 questions in 90 minutes (40 biology, 30 general chemistry, 30 organic chemistry).
• Perceptual Ability Test: 90 spatial reasoning questions in 60 minutes, across six subtests.
• Reading Comprehension: 50 questions in 60 minutes on 3 science passages. Quantitative Reasoning: 40 questions in 45 minutes, the only section with a calculator.
• There is one scheduled break, 30 minutes, after the first two sections. It is not three short breaks.
• Scores run 200 to 600 in 10-point increments, and Perceptual Ability is not part of your Academic Average.

What is the DAT, and who takes it?

The DAT is a computer-based multiple-choice exam run by the American Dental Association's Department of Testing Services. Dental schools use it alongside your GPA to judge whether you are ready for the science load of a dental curriculum. Every U.S. dental school requires it.

Most applicants take it in the spring of junior year or the summer straight after, which is also what the ADA recommends, because that is after organic chemistry and before applications open. Our guide on when to take the DAT covers the trade-offs, and DAT test dates explains how scheduling works.

The exam tests four things: undergraduate science knowledge, spatial reasoning, scientific reading, and applied math. There is no essay, no manual dexterity task, and no interview component. The Canadian DAT is a separate exam with a manual dexterity test and no Quantitative Reasoning section.

The registration fee is $580 and is non-refundable, per the 2026 DAT Candidate Guide (PDF), which was last updated on August 4, 2026. A limited number of partial fee waivers cover 50 percent of the fee for a first attempt and 50 percent for a retest, plus one free full practice test. They are granted first-come, first-served in batches starting January 1, April 1 and July 1. The ADA has already granted every 2026 waiver, so the next batch opens on January 1, 2027.

DAT sections at a glance

The sections always appear in that order. You cannot skip ahead to a later section or go back to a section once its time expires.

DAT section order and test day timeline

This is the administration schedule in the current Candidate Guide. Note that there is exactly one scheduled break, and it is 30 minutes, not 15:

Two things follow from that table. First, you sit the first two sections back to back, 150 minutes of testing, before the only scheduled break. Plan your stamina around that block, not around a break after each section. Second, if you take the scheduled break, the testing session resumes automatically once 30 minutes have elapsed, so you do not control when it ends.

Any break you take at another point is an unscheduled break. During one you may not access your locker or personal belongings, study, use a phone, eat, or leave the test center. Report to the test center at least 30 minutes before your appointment; arriving more than 30 minutes late forfeits the full fee.

The test timer pauses while a question loads, so loading time does not count against you.

Section 1: Survey of the Natural Sciences (100 questions, 90 minutes)

The Survey of the Natural Sciences (SNS) is the first and longest section. It is 100 questions split into three subtests in a fixed order: 40 biology, 30 general chemistry, 30 organic chemistry.

You have 90 minutes for all 100 questions. There is no separate timer per subtest, so you choose how to spend the time across the three subjects.

One thing to know before you read any topic list: the ADA publishes the topics for each subtest but does not publish a percentage weight or an item count per topic. Percentage tables you find elsewhere are estimates, not official specifications. The lists below are the ADA's own, in its own order.

Biology (40 questions)

Biology is the largest single subject on the DAT. The Candidate Guide groups it into five areas:

Every area ends with "integrated relationships" in the official list, and that is the real signal: questions ask you to connect concepts across areas, such as how a genetic mutation changes a physiological system. Understanding beats memorizing.

Suggested pacing: about 30 seconds per question, roughly 20 minutes for biology. For more detail, see our complete DAT biology guide.

General Chemistry (30 questions)

Full section guide: how to study DAT general chemistry. On the reference you are given: does the DAT provide a periodic table?. The answer is yes, an on-screen periodic table is available during this subtest.

The official topic list, in the guide's order:

What to expect: no calculator anywhere in the SNS. Calculation problems are built to be solved with mental math and estimation, so practice without one.

Suggested pacing: about 75 seconds per question, roughly 37 minutes for general chemistry.

Organic Chemistry (30 questions)

Organic chemistry covers reactions, mechanisms, functional groups, nomenclature and stereochemistry. Learn reactions by functional group rather than by textbook chapter, because understanding why a reaction happens lets you solve a problem you have never seen.

The current specifications group the subtest into mechanisms, chemical and physical properties of molecules, stereochemistry, nomenclature, individual reactions of the major functional groups and multi-step synthesis, acid-base chemistry, and aromatics and bonding. If you have not finished Organic Chemistry II, the DAT-relevant material can still be covered through targeted DAT prep courses.

A specification update is pending, with no confirmed date. The ADA has published new organic chemistry examination specifications (PDF) that reorganize the subtest into mechanisms, chemical synthesis, acid-base chemistry, chemical and physical properties of molecules, and structural evaluation. The Candidate Guide updated in August 2026 still describes these updates as anticipated, still prints both the prior and the updated lists, and tells candidates to check the DAT website for the implementation date. So as of October 2026 the change has not been confirmed as live. The content itself is not changing much: the ADA says the update is mainly simpler topic names plus a fuller list of subtopics. Reference whichever specifications are in effect on your own test date.

One mechanics detail worth practicing: the DAT uses curved arrows both ways. You may be asked to predict products from starting materials and arrows, or to predict the arrows from starting materials and products. Full-headed arrows mean an electron pair moves, fishhook arrows mean a single electron moves.

Suggested pacing: about 60 seconds per question, roughly 30 minutes for organic chemistry.

Time management across the whole SNS: 20 minutes on biology, 37 on general chemistry and 30 on organic chemistry leaves about 3 minutes to revisit flagged questions before the section closes.

Section 2: Perceptual Ability Test (90 questions, 60 minutes)

The Perceptual Ability Test (PAT) is 90 two-dimensional and three-dimensional problems that measure how accurately you perceive object dimensions and manipulate objects mentally. Those skills map onto clinical dentistry: reading radiographs, working with models, judging three-dimensional tooth structure.

The ADA lists six subtests and uses its own names for them, which differ from the names students use. The ADA does not publish an item count per subtest.

Note the Cube Counting wording. The question is how much of each cube is exposed, not how many sides are painted a particular color, and reading it the official way avoids a classic error on the mixed-count answer choices.

What to expect: PAT is widely called the hardest section because it tests a skill most applicants have never practiced. It is also the most improvable section, which is why daily practice pays.

Study tips:

• Practice PAT daily for at least 30 minutes, starting early in your prep
• Use a generator for unlimited practice (DAT Booster and DAT Bootcamp both have one)
• Apertures and View Recognition are usually the hardest, so give them extra time
• Build a repeatable method for each subtest instead of relying on intuition
• Review the official PAT instructions before test day, because reading them under the clock wastes time

Suggested pacing: about 40 seconds per question. Do not spend more than a minute on any one item. Free timed practice: perceptual ability drill. Strategy: our full PAT study guide.

Section 3: Reading Comprehension (50 questions, 60 minutes)

Reading Comprehension gives you 3 science passages, each roughly 1,100 to 1,400 words, and each followed by approximately 15 to 20 questions. The topics come from basic science taught in an undergraduate curriculum, and you are not expected to know them in advance. Every answer is in the text.

What it tests: whether you can read, understand and analyze dense scientific writing at speed.

Question types

Study tips:

• Practice on dense, unfamiliar science passages under time
• Try "search and destroy": read the questions first, then scan for answers. Many students find it faster than reading the passage in full.
• Budget 20 minutes per passage, questions included
• RC rewards practice quickly, so it is a good place to find early points

Suggested pacing: about 72 seconds per question. Free timed practice: reading comprehension drill. More strategy: our DAT Reading Comprehension guide.

Section 4: Quantitative Reasoning (40 questions, 45 minutes)

Quantitative Reasoning (QR) is the final section. The 40 questions are 30 mathematical problems and 10 applied mathematics word problems. This is the only section with a calculator: a basic digital calculator appears on screen.

The official topic list is short. Mathematical problems cover algebra (equations and expressions, inequalities, exponential notation, absolute value, ratios and proportions, graphical analysis), data analysis, interpretation and sufficiency, quantitative comparison, and probability and statistics. The remaining questions are applied word problems.

There is no calculus and no advanced mathematics. The exam assumes the basic math, algebra, data analysis and probability of a first-year college student preparing for college science courses. The data analysis and critical thinking items were added in 2016, which is why older prep material underweights them.

Study tips:

• Review fractions, percentages, probability, basic trigonometry and unit conversions
• Estimate before you calculate: it catches errors and saves time
• Weight your practice toward word problems and data interpretation
• Practice mental math anyway, because the on-screen calculator is slow

Suggested pacing: about 67 seconds per question. Free timed practice: quantitative reasoning drill.

How the DAT is scored

DAT results are scale scores from 200 to 600 in 10-point increments (200, 210, 220 and so on), a system the ADA put in place on March 1, 2025 to replace the old 1 to 30 scale. There is no official passing score: each program sets its own standard.

A scale score is not a raw score and not a percentile. The Candidate Guide is explicit that scale scores are "neither raw scores (i.e., the number of questions answered correctly) nor percentiles," so a DAT score cannot be read as a percentage correct. Scores come from an item response theory model that accounts for each question's difficulty, how well it separates stronger from weaker candidates, and how susceptible it is to guessing. You are not penalized for guessing, and some questions on every form are unscored experimental items that look exactly like the rest.

What scores are reported?

You receive 8 scores:

Read that last row again, because it is the most common misconception about the DAT. Per the DAT User Manual (PDF), the Academic Average is "the rounded arithmetic mean of the quantitative reasoning, reading comprehension, biology, general chemistry, and organic chemistry scores." Perceptual Ability is not in it. Five scores go in, and PAT is reported separately for schools to weigh as they choose.

Both composites are means rather than sums, and both round to the nearest 10-point increment, so a calculated mean of 343 is reported as 340.

That changes how you budget study time. PAT still matters, because many schools set their own PAT expectations and it is half the test day's first block. But a point of PAT does not move your Academic Average, while a point of general chemistry moves it by a fifth of a point.

What the 2025 cohort actually scored

These are the means for every reported score, from the norms table in the same ADA User Manual linked above. They cover 17,430 DAT attempts between March 1 and December 31, 2025, the first cohort scored entirely on the 200 to 600 scale:

Reading Comprehension is the highest-scoring section in that cohort and general chemistry the lowest, a 29-point spread on a scale that moves in 10-point steps. That is worth knowing when you set section targets: an above-average RC score is a lower bar than an above-average general chemistry score.

What is a competitive DAT score?

Here are the real percentile anchors for the Academic Average, from the ADA's score reporting scale guide (PDF), which also carries the official old-to-new concordance table:

Both tables are built on a national normative sample of more than 30,000 DAT attempts. If you have seen the claim that the 75th percentile starts around 450, it does not: 430 is the 75th percentile and 450 is the 85th. Most competitive programs look for an Academic Average above the 50th percentile, and the stronger programs cluster around the 75th and up. For school-specific expectations see our DAT scoring guide and what counts as a good DAT score.

Pacing strategies by section

Time management is one of the biggest challenges on the DAT. These are our recommended splits, not ADA rules:

General tips:

• Never leave a question blank: there is no penalty for guessing
• Flag hard questions and return after the easy ones are banked
• Take full-length timed tests to build the stamina for a 150-minute opening block

FAQs about the DAT

What is the DAT?

The DAT is the Dental Admission Test, the standardized exam U.S. dental schools require from applicants. It is a computer-based multiple-choice test of 280 questions in four sections: Survey of the Natural Sciences, Perceptual Ability, Reading Comprehension, and Quantitative Reasoning. The appointment runs five hours and 15 minutes, and scores are reported from 200 to 600.

How many questions are on the DAT?

There are 280 multiple-choice questions: 100 in the Survey of the Natural Sciences, 90 in the Perceptual Ability Test, 50 in Reading Comprehension, and 40 in Quantitative Reasoning.

How long is the DAT?

Total administration time is five hours and 15 minutes. That covers an optional 15-minute tutorial, 255 minutes of scored testing, one optional 30-minute scheduled break after the first two sections, and an optional 15-minute post-test survey. Active testing time is 4 hours and 15 minutes, and you should arrive at the test center 30 minutes early.

How many breaks do you get on the DAT?

One scheduled break, and it is 30 minutes, taken after the Perceptual Ability Test. That means your first stretch of testing is 150 continuous minutes of Natural Sciences and PAT. You may step away at other times, but any other break is unscheduled, which means no locker access, no food, no phone, and no leaving the test center.

What is the order of DAT sections?

Always the same order: (1) Survey of the Natural Sciences, (2) Perceptual Ability Test, (3) Reading Comprehension, (4) Quantitative Reasoning. You cannot change the order or jump ahead, and once a section's time is up you cannot return to it.

Is the Perceptual Ability Test part of the Academic Average?

No. The Academic Average is the rounded mean of five scores: quantitative reasoning, reading comprehension, biology, general chemistry and organic chemistry. Perceptual Ability is reported as its own score and many schools set a separate PAT expectation, but it does not change your Academic Average.

What is a 70 percent on the DAT?

It is not a thing the DAT reports. DAT results are scale scores from 200 to 600, and the ADA states plainly that they are neither raw scores nor percentiles, so there is no percentage correct on your score report. If you want to know where a score stands, use the percentile rank table: an Academic Average of 430 is the 75th percentile. Our DAT percentile calculator converts any score.

Is a 25 on the DAT good? What about a 27?

Those are old-scale scores, and they are both strong. On the ADA concordance table an Academic Average of 25 on the old 1 to 30 scale is about 510 on the 200 to 600 scale, which is the 98th percentile. A 27 is about 540. If you are working from advice written before March 2025, our old-to-new DAT score conversion translates it.

Is a 400 a good DAT score?

A 400 Academic Average is the 54th percentile, so slightly above the midpoint and very close to the 2025 cohort mean of 407.8. It is an average score. Most competitive programs want more than the 50th percentile, and 430 puts you at the 75th.

What is the hardest section of the DAT?

It varies by student. The Perceptual Ability Test is the one most often named, because it tests spatial reasoning that few applicants have practiced. Biology is hard on volume. Organic chemistry is hard if you have not finished Orgo II. Quantitative Reasoning is usually the easiest for students with a solid math background. Our guide on how hard the DAT is goes section by section.

Do you get a calculator on the DAT?

Only during Quantitative Reasoning, and it is a basic on-screen calculator. There is none for the Survey of the Natural Sciences, the PAT or Reading Comprehension. General chemistry calculations are built to be solved by estimation and mental math. You do get an on-screen periodic table during general chemistry.

Are all DAT questions multiple choice?

Yes, all 280. There is no penalty for guessing, so answer every one. Some items on each form are unscored experimental questions, and they look identical to scored ones, which is another reason not to leave anything blank.

Can you go back to previous questions within a section?

Yes. Inside a section you can move between questions, flag them for review and return before time expires. Once a section ends you cannot go back to it.

How is the DAT scored?

On a 200 to 600 scale in 10-point increments, using an item response theory model rather than a raw count of correct answers. You receive 8 scores: biology, general chemistry, organic chemistry, Survey of the Natural Sciences, Perceptual Ability, Reading Comprehension, Quantitative Reasoning, and the Academic Average. The Academic Average is the mean of all of those except the SNS composite and Perceptual Ability. See our DAT scoring guide for the full picture.

How much does the DAT cost?

The examination fee is $580, non-refundable, and it includes score reporting to the schools you select when you apply. Extra score reports are $55 each, a score audit is $105, and a 45-day eligibility extension is $150. Partial fee waivers cover half the fee for eligible first-time candidates, and the next batch opens January 1, 2027.

What is the difference between the American DAT and the Canadian DAT?

The Canadian DAT is a separate exam run by the Canadian Dental Association. It includes a Manual Dexterity Test, has no Quantitative Reasoning section, and is administered on its own schedule. If you are applying to Canadian dental schools, prepare for that version specifically.

How should I prepare for each section?

Build a plan around your weak sections. Most students need a structured DAT study schedule of 10 to 14 weeks: content review first, then active practice, then full-length timed tests. Because PAT is the most improvable section and sits outside the Academic Average, treat it as daily practice rather than content review. Our full guide on how to prepare for the DAT walks through the sequence, and the free DAT study plan generator builds the calendar for you.

Where can I practice each section for free?

We have a free timed drill for every section of the Survey of the Natural Sciences and both reasoning sections: biology, general chemistry, organic chemistry, perceptual ability, reading comprehension, and quantitative reasoning. Each runs in a test-day-style interface with full explanations.

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