How Long Is the DAT?

How long is the DAT? Plan for five hours and 15 minutes of administration time, according to the American Dental Association DAT program. The four test sections account for four hours and 15 minutes of that total. The rest of the session is an optional tutorial at the start, an optional break in the middle and an optional survey at the end.

That makes the DAT longer than its question time alone suggests. You also have to arrive before your appointment, clear check-in and keep moving through sections that give you around a minute an item. Understanding the full schedule helps you choose a realistic appointment, practice under the right conditions and avoid being surprised by the length of the day.

DAT Timing at a Glance

• The complete administration lasts five hours and 15 minutes, while the four required test sections total four hours and 15 minutes.
• The only scheduled break comes after the Perceptual Ability Test. It lasts up to 30 minutes and the session restarts automatically when that time expires.
• Arriving 30 minutes early brings your planned time at the test center to about five hours and 45 minutes before any unexpected delay.
• Prepare for the actual section lengths with 90-minute and 60-minute timed blocks, plus at least one uninterrupted four-hour-and-15-minute practice run.

The DAT Test Day Schedule

The DAT contains four multiple-choice sections presented in Standard American English: Survey of the Natural Sciences, Perceptual Ability, Reading Comprehension and Quantitative Reasoning. Together, they contain 280 items. The exam is offered throughout the year, but appointment availability can affect when you test. Use IMA’s guide to DAT registration, test dates and scores when you are ready to plan the administrative side of your appointment.

The schedule below follows the 2026 DAT Candidate Guide published by the American Dental Association, updated December 11, 2025. It shows each part of the session in order, including the four test sections and three optional parts.

The table above separates administration time from question time. If you use the full tutorial, break and survey, the session reaches five hours and 15 minutes. If you skip all three optional parts, the four required sections still take four hours and 15 minutes.

Survey of the Natural Sciences

Survey of the Natural Sciences gives you 90 minutes for 100 items drawn from biology, general chemistry and organic chemistry. The guide allocates 40 items to biology, 30 to general chemistry and 30 to organic chemistry. Across the complete section, that works out to 54 seconds per item.

The average is a planning tool rather than a required limit for every question. A more involved item may need additional time, which means you need to recover that time elsewhere in the section. Practice should teach you when to keep working and when to move on rather than expecting every item to take exactly 54 seconds.

Perceptual Ability Test

The Perceptual Ability Test contains 90 items in 60 minutes, or an average of 40 seconds per item. Its six subtests cover apertures, view recognition, angle discrimination, paper folding, cube counting and spatial relations or three-dimensional form development.

This is the fastest average pace on the exam. Because the scheduled break comes immediately afterward, your first major test-day block consists of 90 minutes of natural sciences followed by 60 minutes of perceptual ability before you reach that break.

Reading Comprehension

Reading Comprehension provides 60 minutes for 50 items based on three scientific passages. Prior understanding of the passages’ science topics is not required. The section averages one minute and 12 seconds per item, or about 20 minutes per passage if you divide the hour evenly.

A passage-level target can be easier to use than checking the clock after every question. It gives you a broader checkpoint while preserving flexibility for passages and items that differ in difficulty.

Quantitative Reasoning

Quantitative Reasoning is the final required section. It has 40 items in 45 minutes, averaging about one minute and eight seconds per item. Topics include algebra, data analysis, quantitative comparison, probability and statistics, plus applied word problems. A digital calculator is available during this section.

How the DAT Break Works

You receive one scheduled break on the DAT. It comes after Survey of the Natural Sciences and the Perceptual Ability Test, before Reading Comprehension begins. The break is optional and can last up to 30 minutes. If you take it, the testing session resumes automatically when the 30 minutes expire.

That automatic restart makes the break a firm deadline rather than an open-ended pause. Plan enough time to complete any permitted break activities and return through the required test center procedures. The biometric information captured at check-in supports a faster return to testing after a break.

You may skip the scheduled break if you prefer to continue, but doing so removes the only planned pause in the testing session. You would move straight from the first two sections into Reading Comprehension and then Quantitative Reasoning. Plan for the break as though you will need it. Deciding on test day that you do not is easier than wishing you had one.

What Happens During an Unscheduled Break?

Any pause outside the scheduled break is an unscheduled break. During one, you may not access your locker or personal belongings, study or consult notes, use a phone, eat or drink anything stored in your locker or leave the test center. Those limits make an unscheduled break a poor substitute for the scheduled one.

The test timer pauses while an item loads on the screen, so loading time is not deducted from your allotted section time. That covers loading time only. It is not permission to stop the clock when you choose.

How Much Time Should You Reserve for Test Day?

Reserve at least five hours and 45 minutes from your required arrival time through the end of the full administration. That estimate combines the five-hour-and-15-minute administration with the instruction to report at least 30 minutes before your appointment. It does not include travel, parking or an unexpected check-in delay, so avoid placing another important commitment immediately afterward.

Arriving early matters because check-in involves more than showing an appointment confirmation. The test center electronically captures your identity through a method such as a photograph, fingerprint or palm vein scan, and you must consent before you can test. Staff inspect eyeglasses and hair accessories and may use a detection wand to check for electronic devices. Jewelry is prohibited except for wedding and engagement rings.

You also need two original, current physical IDs. Your primary identification must be government-issued and show your photograph, name and signature. Your secondary identification must show your name and signature. Expired identification is not accepted, and the name on both IDs must match your DAT application exactly. A mismatch can prevent you from testing and result in the loss of the appointment and application fee.

Do not treat the early arrival instruction as spare time. A candidate who arrives more than 30 minutes after the scheduled start can be refused admission and forfeit the full testing fee. Checking your route, identification and application name before test day protects more than your schedule.

What the Optional Tutorial and Survey Add

The optional tutorial appears at the beginning of the appointment and allows up to 15 minutes. It introduces how to use the computer to move through the exam before official questions begin. Once testing starts, items appear one at a time on the screen.

You can skip the tutorial, but using it gives you a final chance to become comfortable with the exam controls without spending section time. Even if you practiced beforehand, the tutorial can help you settle into the testing environment before the 90-minute science section begins.

The optional post-test survey appears after Quantitative Reasoning and also allows up to 15 minutes. Because it comes after all required sections, it does not affect the time available for test questions. Skipping both the tutorial and survey removes up to 30 minutes from the administration, while skipping the scheduled break removes another 30 minutes.

Can You Skip a Test Section?

No. Partial testing is not permitted, so you must take every DAT section. The lowest possible score is reported for an assigned test that is not taken. If you cannot complete the exam, you must submit a new application and fee before testing again.

Optional parts can shorten your time at the computer. They cannot turn the DAT into a partial exam or let you stop once the science and perceptual ability sections are behind you.

How to Build the DAT Into Your Study Calendar

No single preparation period fits every student, and the ADA does not publish one. The ADA starts somewhere more useful: take the DAT after you have completed the subjects it covers, especially organic chemistry. Its advice on applying to take the DAT points to the spring of your junior year or the summer between your junior and senior years.

Once you have a target period, work backward from the appointment. The ADA recommends applying and contacting Prometric 60 to 90 days before your intended test date because schedules can fill. After your application is processed, your eligibility generally lasts six months unless another rule shortens it. These deadlines matter when you are coordinating classes, application work or a pre-dental internship.

Your study blocks should reflect the test you will actually take. Use 90-minute sessions for natural sciences and 60-minute sessions for perceptual ability or reading comprehension. Before test day, complete at least one uninterrupted four-hour-and-15-minute run covering the full required testing span. That rehearsal helps you evaluate concentration and pacing across multiple sections rather than judging readiness from short question sets alone.

The ADA’s full practice test is useful, but it is not the same length as the real DAT. It allows three hours and five minutes, divides the work into timed sections and does not include a break. Some practice modules also contain fewer items than the corresponding exam sections. The practice tests report the number answered correctly rather than a score, and the ADA says their purpose is to demonstrate question types rather than predict performance.

If the test center environment itself concerns you, Prometric’s Test Drive covers scheduling and registration, the full check-in process, the staff and surroundings and a 15-minute generic sample test. It is a way to become familiar with the process, not a DAT content practice session.

Choose your appointment carefully because a retake affects your calendar. Candidates must wait 60 days between attempts and may take the DAT no more than four times in a 12-month period. In the longer view, this is one admissions test within the years required to complete dental school, but a rushed appointment can still disrupt your immediate application schedule.

Testing Accommodations and an Interrupted Exam

Approved testing accommodations can change the timing or conditions for a candidate with a documented disability or medical condition. You must request accommodations before testing and receive approval from the DAT Program. Accommodations must be requested with each application, although you do not need to provide new documentation for the same condition at future administrations after it has been approved. The accommodations provided are not identified in your examination results.

Do not wait until the appointment to raise a timing need. Follow the accommodation process when you apply and make sure approval is in place before test day. Plan your day around the conditions approved for you rather than the standard five-hour-and-15-minute schedule.

If something on the day stops you from finishing, the same rule applies: there is no partial administration, so retesting means a new application and fee. With the waiting period between attempts on top of that, an interrupted exam can cost you a testing window rather than a day.

Plan for the Full DAT Experience

Build your test-day plan around five hours and 15 minutes of administration plus the required early arrival. Within that period, expect four hours and 15 minutes of required testing, one optional 30-minute scheduled break and up to 30 additional optional minutes for the tutorial and survey.

Before booking, confirm that your coursework, practice stamina and application calendar support the date you want. Then rehearse the long testing blocks, check your identification and decide in advance how you will use the scheduled break. Once the DAT is behind you, you can turn your attention to comparing programs, including IMA’s overview of the best dental schools in the US.

Frequently Asked Questions

How Long Is the DAT With the Break?

The DAT lasts five hours and 15 minutes when you use the complete administration time, including the optional 30-minute scheduled break. The four required sections account for four hours and 15 minutes, while the tutorial, break and survey account for the remaining hour.

How Long Is Each DAT Section?

Survey of the Natural Sciences lasts 90 minutes, Perceptual Ability lasts 60 minutes, Reading Comprehension lasts 60 minutes and Quantitative Reasoning lasts 45 minutes. Together, the four sections take 255 minutes, or four hours and 15 minutes.

How Many Breaks Do You Get on the DAT?

You get one scheduled break. It comes after the first two sections, lasts up to 30 minutes and is optional. The session resumes automatically when the 30 minutes expire. A pause taken at another time is an unscheduled break with restrictions on locker access, food, drinks, phones and notes.

Can You Skip the DAT Tutorial or Break?

Yes. The 15-minute tutorial and 30-minute scheduled break are optional, as is the 15-minute post-test survey. Skipping all three reduces the session to the four hours and 15 minutes assigned to the required test sections.

How Early Should You Arrive for the DAT?

Arrive at least 30 minutes before your scheduled appointment. Adding that required arrival period to the full administration produces a planned test center commitment of about five hours and 45 minutes. Bring two current physical IDs and make sure their names exactly match your application.

Can You Stop the DAT After Two Sections?

No. Partial testing is not allowed, and every DAT section is required. The lowest possible score is reported for an assigned test you do not take. If you cannot complete the exam, you must submit another application and fee before retesting.

Do You Get a Calculator on the DAT?

Yes, for one section. The ADA provides a digital calculator during Quantitative Reasoning, the 45-minute section that holds 40 items.

How Long Is the ADA Full DAT Practice Test?

The ADA’s full DAT practice test allows three hours and five minutes. It uses timed sections but does not include a break, so it is shorter than the four hours and 15 minutes of required testing on the actual DAT. It reports the number correct rather than a score.