Passing the CNA Certification Exam

A clear, plain-English guide to what the CNA exam covers, how the written and skills portions work, and study habits that help you walk in prepared.

Reviewed by the Pop Nursing editorial team · Updated June 2026

What the CNA Exam Is and Why It Has Two Parts

The Certified Nursing Assistant (CNA) certification exam is the competency test you typically take after completing a state-approved nurse aide training program. Under long-standing federal rules, that training is usually at least 75 hours, including a minimum number of supervised clinical hours, though many states require more. The exact requirements vary by state and program, so always confirm the details with your training provider.

The exam is designed to confirm two different things. First, do you know the core information a nurse aide needs? Second, can you safely perform the hands-on care itself? Because of that, the exam is almost always split into a written (or oral) knowledge test and a clinical skills evaluation. In most states you must pass both parts to earn certification and be placed on the state nurse aide registry.

One important note up front: there is no single nationwide CNA exam. States contract with different testing vendors (you may see names like Credentia, Prometric, Pearson VUE, Headmaster/D&S, or a state-run provider), and the format differs accordingly. Treat the numbers in this article as typical ranges, and rely on your own state's official candidate handbook for the specifics that apply to you.

The Written (or Oral) Knowledge Test

The written portion is a multiple-choice test, typically somewhere in the range of about 60 to 75 questions depending on the vendor and state. Some of those questions may be unscored "pretest" items that don't count toward your result. You usually have roughly 90 minutes to two hours, but the time limit varies.

Most states offer an oral version for candidates who find reading difficult; the questions are read aloud, often through a headset, and may include a short word-recognition section. Availability and rules for the oral exam differ by state, and accommodations for English-language learners specifically are handled differently from state to state.

The questions are spread across the core knowledge areas a nurse aide uses every day. These commonly include:

• Physical care skills (the largest share), such as activities of daily living, basic nursing skills, and restorative care
• Psychosocial care, including emotional, mental-health, and dignity-related needs
• Role of the nurse aide, including communication and being part of the care team
• Safety and emergency procedures
• Infection control
• Legal and ethical responsibilities, including residents' rights

The precise weighting of each area varies by testing vendor, but physical care and safety-related topics generally make up the biggest portion.

The Clinical Skills Evaluation

The skills evaluation is often the part candidates feel most anxious about, because you perform real tasks in front of a live evaluator. You'll typically be asked to demonstrate about 3 to 5 skills drawn from a published skills list, and the specific skills are usually selected at random on test day. Many providers require hand hygiene (handwashing) either as a graded skill or as a step you must perform, and it is one of the most commonly emphasized items.

Common skills on these lists include measuring vital signs, assisting with feeding or ambulation, providing perineal or oral care, performing range-of-motion exercises, applying support devices, and helping a resident transfer or reposition. Each skill is scored against a checklist of required steps, and certain steps are treated as critical. Missing a critical safety step (for example, locking wheels on a wheelchair, checking water temperature, or maintaining the resident's privacy and dignity) can cause you to fail that skill even if the rest went smoothly.

The skills portion usually takes around 25 to 35 minutes. Because the checklist rewards consistency, many candidates do best when they perform every skill the same careful way each time: introduce yourself, wash your hands, provide for privacy, explain what you're doing, keep the resident safe and comfortable, and wash your hands again at the end. The exact skills list, the number tested, and the scoring are set by your state and testing vendor, so study from your provider's official checklist rather than a generic one.

If You Don't Pass the First Time

Not passing on the first attempt is more common than people expect, and in many states it does not mean starting over. A frequent arrangement is that if you pass one part (say, the written test) but not the other, your passing part may stay valid for a period while you retake only the portion you didn't pass. There is also usually a limit on the number of attempts within a set time frame (often something like three attempts within roughly two years), and sometimes a short waiting period between tries.

These rules are an area where states differ a great deal. Some allow fewer attempts, some have different waiting periods, and after a certain number of unsuccessful attempts you may be required to repeat training before testing again. None of this is a guarantee or a uniform national policy, so check your state's official candidate handbook for the retake rules, deadlines, and any fees that apply to you.

How to Prepare and What Comes After

A practical study plan blends knowledge review with hands-on rehearsal:

• Use your own state's materials. Download the official candidate handbook and skills checklist for your testing vendor, and study from those rather than generic lists.
• Practice skills out loud and with your hands. Rehearse each skill step by step, ideally with a partner or instructor watching, until safety steps like hand hygiene and privacy feel automatic.
• Take practice questions. Sample tests help you get comfortable with the multiple-choice style and reveal which knowledge areas need more review.
• Build steady habits. Short, frequent study sessions and a calm test-day routine (rest, a meal, arriving early with required ID) tend to help more than last-minute cramming.

Once you pass both parts, you're typically added to your state's nurse aide registry, which is what allows you to work as a CNA in that state; certification must usually be renewed on a schedule, and rules for working in a different state vary. As a sense of the field, the U.S. Bureau of Labor Statistics reported a median wage of roughly $39,500 per year for nursing assistants as of May 2024, with most earners falling within a range below and above that figure. Actual pay varies widely by location, employer, shift, and experience, and CNA work is often a meaningful first step for people who later pursue LPN or RN paths. This article is for general educational purposes and is not a guarantee of certification, employment, or earnings.

This article is for general educational purposes only and is not admissions, career, financial, or medical advice. Program length, cost, accreditation, and licensing requirements vary by school and by state — always confirm details with the school and your state board of nursing.