OAT Practice Test 2026 — Free OAT Exam Prep Questions
The OAT is the admission test used by schools and colleges of optometry in the U.S. and Canada. It covers the Survey of the Natural Sciences (biology, general chemistry, organic chemistry), Reading Comprehension, Physics and Quantitative Reasoning. Our practice set follows the official 2026 test specifications, with emphasis on optics and the visual system, science problem solving, a science reading passage and applied math.
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OAT format, scoring & key facts
Computer-based at Prometric test centers. Sections in order: Natural Sciences (90 min), Reading Comprehension (60 min), optional 30-minute break, Physics (50 min), Quantitative Reasoning (45 min). Total appointment 5 hours 5 minutes including the optional tutorial and survey. A periodic table is available in General Chemistry and an on-screen calculator in Quantitative Reasoning only.
| Structure | Natural Sciences 100 items (Biology 40, General Chemistry 30, Organic Chemistry 30), Reading Comprehension 50, Physics 40, Quantitative Reasoning 40 |
|---|---|
| Timing | 90 + 60 + 50 + 45 minutes, with an optional 30-minute break after Reading Comprehension; 5 hours 5 minutes in total |
| Scores | 200–400 for each test plus Total Science and Academic Average; no passing score and no guessing penalty |
| Calculator | On-screen calculator in Quantitative Reasoning only (none in Physics); periodic table available in General Chemistry |
| Organic Chemistry | Updated test specifications in effect since June 2026 |
| Reading Comprehension | Three science passages of about 1,000–1,500 words, each followed by about 15–20 questions |
| Retakes | 60 days between attempts; up to 4 attempts in 12 months |
| Score release | Unofficial report at the test center; official scores to schools in 3–4 weeks |
Facts last verified Oct 26, 2026. Source: oat.ada.org/-/media/project/ada-organization/ada/oat/files/oat_candidate_guide.pdf. Always confirm details with ASCO before your exam.
When can you take the OAT?
Offered year-round at Prometric test centers (no longer in Quebec). After your application is processed you have 6 months to test; book 60–90 days ahead.
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What the OAT covers
Every PrepBanq OAT test mirrors the official domain weights.
Domain distribution
% of the exam| Content domain | Weight | ≈ Questions on exam | Our practice questions |
|---|---|---|---|
Biology40 items: cell and molecular biology, diversity of life, structure and function of systems, genetics, evolution and ecology. | 17% | ~39 | 26 questions → |
General Chemistry30 items: stoichiometry, gases, liquids and solids, solutions, acids and bases, equilibria, thermodynamics, kinetics, redox, atomic and molecular structure, periodic properties, nuclear reactions, laboratory. | 13% | ~30 | 20 questions → |
Organic Chemistry30 items: mechanisms, chemical synthesis, acid-base chemistry, chemical and physical properties of molecules, structural evaluation. | 13% | ~30 | 20 questions → |
Reading Comprehension50 items on three scientific reading passages; no prior science knowledge required. | 22% | ~51 | 32 questions → |
Physics40 items: units and vectors, kinematics, statics, dynamics, rotational motion, energy and momentum, simple harmonic motion, waves, fluid statics, thermodynamics, electrostatics, D.C. circuits, optics. | 17% | ~39 | 26 questions → |
Quantitative Reasoning40 items: algebra, data analysis, interpretation and sufficiency, quantitative comparison, probability and statistics, applied word problems. | 17% | ~39 | 26 questions → |
How to register for the OAT
Retake policy
Wait 60 days between attempts, with at most 4 attempts in any 12-month period. After 3 or more attempts you must apply for permission and show proof of a recent optometry school application; after the 5th attempt you may retest once per 12 months.
Score release
An unofficial score report is given at the test center. Official scores are sent to your selected schools and posted to your OAT PIN account within 3–4 weeks.
Credential renewal
Scores become part of your permanent record and cannot be voided; all attempts are reported to schools.
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OAT FAQ
How many questions are on the OAT?
The OAT has 230 questions and you have 4 hours 5 minutes to finish. Question types: All multiple choice. Survey of the Natural Sciences (Biology, General Chemistry, Organic Chemistry), Reading Comprehension (three scientific passages of about 1,000–1,500 words), Physics and Quantitative Reasoning. Some questions are unscored experimental items that look like scored ones..
How long is the OAT exam?
Testing time for the OAT is 4 hours 5 minutes.
What is the passing score for the OAT?
OAT passing standard: No official passing score: each optometry program decides what score it accepts. Score range: 200–400 in 10-point increments.
How much does the OAT cost?
The OAT registration fee is $520 for July 1, 2025–June 30, 2026; the fee changed on July 1, 2026 (check the current OAT Candidate Guide). Additional score reports $55 each; score audit $105; 45-day eligibility extension $150. Check the official site for current fees before you register.
What is on the OAT?
The OAT covers Biology (about 17%), General Chemistry (about 13%), Organic Chemistry (about 13%), Reading Comprehension (about 22%), Physics (about 17%), Quantitative Reasoning (about 17%).
Who administers the OAT?
The Optometry Admission Test (OAT) is administered by ASCO. Delivery: Computer-based at Prometric test centers. Sections in order: Natural Sciences (90 min), Reading Comprehension (60 min), optional 30-minute break, Physics (50 min), Quantitative Reasoning (45 min). Total appointment 5 hours 5 minutes including the optional tutorial and survey. A periodic table is available in General Chemistry and an on-screen calculator in Quantitative Reasoning only.
Can you retake the OAT?
Wait 60 days between attempts, with at most 4 attempts in any 12-month period. After 3 or more attempts you must apply for permission and show proof of a recent optometry school application; after the 5th attempt you may retest once per 12 months.
Is there a free OAT practice test?
Yes. PrepBanq has 15 free OAT practice tests with 150 exam-style questions in the real OAT formats, and every answer is explained. No credit card is needed.
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