How long is the DAT, and how many questions?
The DAT takes up to 5 hours and 15 minutes at the test center. That includes an optional 15-minute tutorial, an optional 30-minute break and an optional 15-minute survey. The four test sections take 4 hours and 15 minutes. Added up, they hold 280 multiple-choice items: 100 in Natural Sciences, 90 in Perceptual Ability, 50 in Reading and 40 in Quantitative Reasoning.
The ADA's 2026 DAT Candidate Guide sets the order: tutorial, Survey of the Natural Sciences, Perceptual Ability, the optional break, Reading Comprehension, Quantitative Reasoning and the survey. Natural Sciences puts 40 biology, 30 general chemistry and 30 organic chemistry items into one 90-minute block. The ADA states the 5 hours 15 minutes total. The 280 items and 4 hours 15 minutes of testing are our own sums of the section numbers in the guide.
That works out to about 54 seconds per Natural Sciences item, 40 seconds per Perceptual Ability item, 72 seconds per Reading item and about 68 seconds per Quantitative Reasoning item. The break after the first two sections is the only scheduled one. If you take it, the test starts again on its own after 30 minutes. The guide asks you to arrive 30 minutes before your appointment.
Some older ADA pages still say the test takes 4.5 hours, so go by the Candidate Guide for your year. Since 2025, DAT scores run from 200 to 600, and there is no official passing score: each dental school decides what it accepts. You must wait 60 days between attempts, with at most four attempts in 12 months.
| Part | Items | Time |
|---|---|---|
| Tutorial (optional) | - | 15 min |
| Survey of the Natural Sciences | 100 (40 biology, 30 general chemistry, 30 organic chemistry) | 90 min |
| Perceptual Ability | 90 | 60 min |
| Break (optional) | - | 30 min |
| Reading Comprehension | 50 | 60 min |
| Quantitative Reasoning | 40 | 45 min |
| Survey (optional) | - | 15 min |
| Testing time | 280 | 4 h 15 min |
| Total with optional parts | 280 | 5 h 15 min |
- 1Take one full practice test in the real order, with the 30-minute break after Perceptual Ability.
- 2Time each section and compare it with the real limits: 90, 60, 60 and 45 minutes.
- 3Find the section where you ran out of time first and drill it with timed sets.
- 4Do a few Perceptual Ability drills every day, because speed there comes from practice, not facts.
- 5Take at least two more full-length tests in the last weeks, and plan to arrive 30 minutes early on test day.