PADI Open Water Exam: How to Pass Your Final Test and Get Certified
Everything you need to know about the PADI Open Water Diver final exam — number of questions, passing score, what topics are covered, and how to prepare effectively with free practice quizzes.
PADI Open Water Exam: How to Pass Your Final Test and Get Certified
You have completed your eLearning modules, practiced mask clears and regulator retrievals in the pool, and now there is one last hurdle standing between you and your Open Water Diver certification: the final exam.
For many student divers, the PADI Open Water Exam is the most nerve-wracking part of the course. The good news? It is designed to test what you already learned — not trick you. With the right preparation, you can walk into the exam room confident and ready.
This guide covers everything you need to know: how many questions are on the exam, what topics appear, what the passing score is, and the most effective ways to study.
If you are new to the course, start with our complete guide to Open Water Diver certification to understand the full training path before diving into exam prep.
PADI Open Water Exam Structure
The PADI Open Water Diver final exam follows a standard format regardless of where you take your course:
- Number of questions: 50 multiple-choice questions
- Time limit: Typically unlimited within reason (most dive shops allow 1–2 hours)
- Passing score: 75% — you must answer at least 38 out of 50 questions correctly
- Language: Available in multiple languages through PADI eLearning
- Format: The test is closed-book and administered through PADI's digital system or on paper at some dive centers
You will also complete shorter Knowledge Reviews at the end of each of the five sections of the eLearning. These are shorter, open-book quizzes that prepare you for the final exam. Each knowledge review has 10–20 questions and covers material from that specific section. Completing them thoroughly is the single best way to prepare for the final.
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.
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.
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
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.
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.
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.
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
Frequently Asked Questions
How many questions are on the PADI Open Water final exam?
The final exam has 50 multiple-choice questions drawn from all five sections of the eLearning course.
What is the passing score for the PADI Open Water exam?
You need at least 75% correct — that is 38 out of 50 questions.
Can I retake the exam if I fail?
Yes. PADI allows retakes. Your instructor will review your weak areas before you try again. Some dive centers charge a small fee for retakes.
Is the exam harder than the Knowledge Reviews?
The exam covers the same material as the Knowledge Reviews but is closed-book and uses different questions. If you understood the Knowledge Reviews well, you will be fine on the final.
Are there free practice tests for PADI Open Water?
Yes. You can test your knowledge with our free PADI Open Water Diver practice quiz to prepare for the real exam.
How long does the PADI Open Water course take?
Most students complete the course in 3–4 days. For a full breakdown, read our guide to how long scuba certification takes.