PADI Open Water Exam & Final Assessment: How to Pass Your Test

You have completed your five eLearning modules, practiced mask clears and regulator retrievals in confined water, and now there is one final academic step standing between you and your certification card: the PADI Open Water Exam (called the PADI Open Water Final Assessment in PADI eLearning).

For many student divers searching for a scuba test or diving exam study guide, the final assessment sounds intimidating. The good news? It is designed to verify that you understand core safety rules — not trick you. With the right preparation, you can pass on your first attempt.

This guide covers everything you need to know: how the 50-question paper exam and digital PADI Open Water Final Assessment work, what happens during the in-shop Quick Review, what topics appear, and how to practice.

If you are new to the course, start with our complete guide to Open Water Diver certification, check out the PADI Open Water swim test requirements, or jump straight into 25 explained scuba diving test questions.

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PADI Open Water Exam & Digital Final Assessment Structure

Whether you take your scuba certification test on paper at a dive center or online through PADI eLearning, the core requirements are standardized worldwide:

• Number of questions: 50 multiple-choice questions on the full exam (plus a 15–20 question in-shop Quick Review if you completed the PADI Open Water Final Assessment online via eLearning)
• Time limit: Untimed / self-paced (most students finish in 30–45 minutes)
• Passing score: 75% (at least 38 out of 50 questions correct)
• Prescriptive review: Even when you score above 75%, your instructor will go over every question you missed so you understand 100% of the material before certifying
• Knowledge Reviews first: Before unlocking the Final Assessment, you complete five shorter open-book PADI Knowledge Reviews at the end of Sections 1–5

Retake Policy

If you do not pass the first time, do not panic. PADI allows retakes. Most dive centers will review your incorrect answers with you and let you retake a different version of the exam. Some shops may charge a small administrative fee for retakes, so it is worth asking about this upfront.

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Topics Covered on the Exam

The PADI Open Water final exam draws questions from all five sections of the eLearning course. Here is what each section covers:

Section 1: The Aquatic World

• Basic underwater physics (pressure, buoyancy, light, sound)
• Gas laws relevant to diving (Boyle's Law, Dalton's Law, Henry's Law)
• How water affects your body at depth

Section 2: Dive Equipment

• Scuba tank types and sizes
• Regulator function and maintenance
• Buoyancy Control Device (BCD) operation
• Exposure suits (wetsuits vs. drysuits)
• Weight systems and proper weighting

Section 3: Dive Planning and Procedures

• Using dive tables or dive computers
• No-stop limits and repetitive diving
• Dive profiles and residual nitrogen time
• Pre-dive safety checks (BWRAF)

Section 4: Dive Environment

• Marine life awareness and hazards
• Environmental conditions (currents, visibility, thermoclines)
• Dive site orientation and navigation

Section 5: Recreational Dive Planning

• Using the Recreational Dive Planner (RDP) or equivalent
• Pressure groups and surface intervals
• Emergency procedures and problem management

Questions on the exam are randomly drawn from a large pool, so no two tests are identical. However, the distribution across these five sections is roughly even.

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Study Strategies That Work

1. Complete All Knowledge Reviews

Each of the five eLearning sections ends with a Knowledge Review — about 10–20 questions covering that section's material. These are open-book and you can take them as many times as you need. Do not skip them. They are the closest thing to the final exam and reveal which topics you need to review.

2. Take Free Practice Quizzes

The best way to simulate exam conditions is to take practice quizzes online. They help you identify weak areas and build confidence with the multiple-choice format.

Test your knowledge right now with our free PADI Open Water Diver practice quiz. It covers the same topics as the real exam and gives you instant feedback on each answer.

3. Focus on Your Weak Areas

After each knowledge review or practice quiz, note which topics you got wrong. Spend extra time rereading those sections in the eLearning or your manual. Common stumbling blocks include:

• Gas laws (Boyle's, Dalton's, Henry's) — students often mix up which law applies to which situation
• Dive table calculations — practice these until the steps become automatic
• Equipment identification — make sure you can name every part of a regulator and BCD

4. Study with a Buddy

Partner up with another student diver and quiz each other. Explaining a concept out loud reinforces your understanding far more than rereading the text. Your dive buddy can also point out gaps in your knowledge that you might miss.

5. Review Dive Table Problems

Even if you plan to use a dive computer for real diving, the exam includes dive table questions. Practice calculating:

• Pressure groups after a dive
• Minimum surface intervals
• New pressure groups after surface intervals
• Total bottom time for repetitive dives

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What to Expect on Exam Day

Most students take the final exam on the last day of their course, after completing all confined water sessions and before or after the open water dives. The environment is typically relaxed:

• Your instructor will review the exam rules and answer procedural questions
• You are expected to work independently — no phones or notes
• Most students finish in 30–60 minutes
• If a question confuses you, skip it and come back
• Trust your first instinct — changing answers without reason often backfires

After the exam, your instructor reviews your results with you. If you passed, congratulations — you are almost a certified diver! If you did not, your instructor will explain which areas need improvement and arrange a retake.

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Common Myths About the PADI Open Water Exam

"The exam is designed to fail students."

False. PADI instructors want you to pass. The exam tests minimum safety knowledge, not perfection. The questions are straightforward when you have studied the material.

"You need 100% to pass."

False. The passing score is 75%. That means you can get 12 questions wrong and still pass.

"The final exam is the same as the knowledge reviews."

Partially true. The topics are the same, but the final exam uses different questions and is closed-book. Treat the knowledge reviews as study tools, not answer keys.

"You have to memorize every dive table."

False. You learn how to use dive tables for the exam, but real-world diving relies on dive computers. The table exercises teach you the principles of no-stop diving, not memorization.

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Free Practice Quiz

Ready to test your knowledge? Try our free 20-question practice quiz covering the core topics from the PADI Open Water Diver course. Each question includes instant feedback so you can learn as you go.

👉 Take the PADI Open Water Diver Practice Quiz

Every question you answer wrong highlights a topic worth revisiting in your course materials. Take the quiz multiple times as you study to track your improvement.

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Next Steps After Passing

Once you pass the exam and complete your open water dives, you will be a certified Open Water Diver. From there, the underwater world opens up:

• Dive to 18 meters (60 feet) with a buddy anywhere in the world
• Rent gear and book dive trips at any PADI-affiliated center
• Continue your education with the Advanced Open Water Diver course, which lets you explore deeper sites and try new specialties
• Check out our other practice quizzes for Advanced Open Water, Enriched Air / Nitrox, and specialty topics
• Review worked exam examples in our 25 sample scuba diving test questions guide and prepare for your PADI Open Water swim test