The HESI A2, formally known as the Health Education Systems Incorporated Admission Assessment, is a standardized entrance exam used by nursing and allied health programs across the United States to evaluate applicants before admission. It was developed to give academic institutions a reliable way to measure whether prospective students possess the foundational knowledge and skills necessary to succeed in rigorous health science curricula. The exam has become one of the most widely recognized pre-admission assessments in the nursing education field, accepted by hundreds of colleges and universities nationwide.
Most nursing programs require the HESI A2 as part of their application process, alongside transcripts, letters of recommendation, and personal statements. The exam helps admissions committees differentiate between candidates who are academically prepared and those who may need additional preparation before entering a demanding program. Because nursing education involves complex scientific concepts, patient care reasoning, and precise communication, programs rely on the HESI A2 to identify students with the right academic foundation.
Exam Structure Overview
The HESI A2 is a computer-based exam administered at approved testing centers or, in some cases, through proctored online platforms affiliated with institutions. The exam is divided into multiple sections, each targeting a specific academic subject area. Not every institution requires every section, which means the version of the exam a student takes may vary depending on which school they are applying to. It is essential to confirm with the admissions office which specific sections are required before registering.
In its most complete form, the HESI A2 covers academic content areas such as mathematics, reading comprehension, vocabulary, grammar, biology, chemistry, anatomy and physiology, and physics. It also includes a personality profile and a learning style assessment, though these sections are not scored in the traditional sense. The total number of questions depends on how many sections the institution requires, and students generally have a set amount of time to complete each subject area independently.
Mathematics Section Details
The mathematics portion of the HESI A2 tests a student’s ability to perform basic and applied arithmetic, algebra, and calculations commonly encountered in healthcare settings. Topics covered include fractions, decimals, ratios, proportions, percentages, and basic algebra. Students are also expected to perform conversions between units of measurement, which is a skill directly applicable to nursing tasks such as medication dosing and fluid management.
Many test-takers find the mathematics section manageable if they have a solid foundation in high school-level math. The questions are presented in a straightforward manner, often within a practical health context. A basic calculator is typically provided during this portion of the exam, though students should not rely solely on that tool and should instead develop mental math fluency. Consistent practice with timed math exercises can significantly improve confidence and accuracy on exam day.
Reading Comprehension Assessment
The reading comprehension section evaluates a student’s ability to extract meaning from written passages, identify main ideas, draw inferences, and distinguish between facts and opinions. Passages in this section are often related to health and science topics, which gives students a preview of the type of reading they will encounter throughout nursing school. Questions may ask about the purpose of a paragraph, the meaning of a specific phrase in context, or the logical conclusions that can be drawn from the information provided.
Strong reading comprehension is fundamental to success in any healthcare program, as nurses must regularly interpret patient charts, care protocols, research publications, and medication instructions. This section rewards students who read widely and who practice active reading strategies such as summarizing paragraphs, annotating key points, and questioning the author’s intent. Students who struggle with reading speed should focus on improving their efficiency without sacrificing accuracy, as this section requires careful attention to detail.
Vocabulary and General Language
The vocabulary section of the HESI A2 assesses a student’s command of words commonly found in medical and general academic contexts. Questions may present a word in isolation and ask for its definition, or they may present a sentence and ask students to identify the meaning of an underlined term based on context. Having a strong vocabulary is essential not only for the exam but also for daily communication in clinical settings where precise language directly affects patient safety.
Students preparing for this section benefit most from consistent study of medical terminology, root words, prefixes, and suffixes. Understanding the building blocks of medical language allows students to deduce the meaning of unfamiliar terms they encounter both on the exam and throughout their careers. Flashcards, vocabulary apps, and medical terminology workbooks are all effective tools for building word knowledge progressively in the weeks leading up to the exam.
Grammar Rules Tested
The grammar section evaluates a student’s understanding of standard English language rules, including subject-verb agreement, correct use of pronouns, proper punctuation, sentence structure, and verb tense consistency. Questions typically present a sentence with an underlined portion and ask the student to select the grammatically correct version from a list of choices. Some questions may also ask students to identify errors or choose the best way to rewrite a given sentence.
Clear written communication is a professional expectation in nursing and allied health fields, where documentation must be accurate and free of ambiguity. Nurses write patient notes, incident reports, and care plans that become part of permanent medical records. A grammar error in a clinical document can cause serious misinterpretation. Students who regularly read well-written prose and who practice grammar exercises from reputable resources will find this section approachable with adequate preparation.
Biology Concepts Covered
The biology section of the HESI A2 covers foundational life science concepts that form the basis of all healthcare knowledge. Topics include cell biology, cellular respiration, photosynthesis, biological macromolecules, genetics, and basic ecology. Students are expected to have a solid grasp of how living organisms function at the cellular and molecular level, as these concepts underpin more advanced topics they will encounter in nursing school, such as pharmacology and pathophysiology.
Preparation for the biology section typically involves reviewing high school or introductory college biology notes and textbooks. Students should pay particular attention to the structure and function of cells, how DNA encodes proteins, and how energy is produced and consumed within living systems. Diagrams, concept maps, and visual study tools are especially helpful for biology content, as much of this material is spatial and process-oriented in nature.
Chemistry Knowledge Required
Chemistry is another academic area assessed by the HESI A2, covering topics such as atomic structure, the periodic table, chemical bonding, acids and bases, chemical reactions, and basic biochemistry. While the depth of chemistry tested is generally at the introductory college level, students who have not taken chemistry recently may find this section challenging without deliberate review. Healthcare professionals encounter chemistry constantly, from understanding how medications work to interpreting laboratory results.
Students who feel less confident in chemistry should allocate extra study time to this section and consider using online tutorials or textbook companion guides that break concepts down into accessible explanations. Practice questions that mirror the format of the exam are especially valuable, as they allow students to identify gaps in their knowledge and address them before the actual test date. A firm grasp of chemistry fundamentals also prepares students for the pharmacology courses they will take during their nursing program.
Anatomy Physiology Questions
The anatomy and physiology section is among the most heavily weighted and commonly required sections of the HESI A2. It covers the major body systems, including the cardiovascular, respiratory, digestive, nervous, endocrine, musculoskeletal, and urinary systems. Students are expected to know the structures within each system, their functions, and how the systems interact to maintain homeostasis. This section directly reflects the content students will study intensively throughout their nursing education.
Given the breadth of material covered, anatomy and physiology requires the most systematic and thorough preparation of any section on the exam. Students should use a combination of textbooks, anatomical diagrams, online quizzes, and lab resources to reinforce both the names of structures and their physiological roles. Simply memorizing terms is not sufficient; students must also be able to explain processes and apply their knowledge to scenario-based questions that describe clinical presentations or physiological changes.
Physics Content Expectations
Not all nursing programs require the physics section, but for those that do, it covers foundational principles of physical science relevant to healthcare. Topics include motion, force, energy, work, pressure, electricity, and optics. These concepts apply to healthcare in practical ways, such as the physics of blood pressure measurement, the behavior of fluids in IV lines, and the principles behind imaging technologies like X-rays and ultrasound.
Students who have not studied physics recently should begin their preparation early for this section, as the concepts can feel abstract without contextual grounding. Connecting physics principles to real-world healthcare applications can make the material more meaningful and easier to retain. While this section tends to be shorter than others, it still requires focused attention, particularly for students whose academic background is more biology-oriented than physical science-oriented.
Scoring System Explained
Each scored section of the HESI A2 receives an individual score expressed as a percentage, ranging from zero to one hundred. A composite score representing overall performance across all completed sections is also calculated. Most nursing programs set a minimum score threshold that applicants must meet or exceed to be considered for admission. This threshold varies by institution, with some programs requiring a minimum of seventy-five percent per section while others set the bar at eighty or even higher.
It is important to note that different sections carry different weights in some institutional scoring formulas. Students should review their target school’s admissions requirements carefully to determine which sections are prioritized and whether any sections must be retaken if the minimum threshold is not met. Failing to meet the required score in even one section can result in disqualification from consideration, making thorough preparation for every required section critically important.
Retake Policies Vary
Retake policies for the HESI A2 differ significantly from institution to institution, and students should clarify these policies before they register for the exam. Some schools allow students to retake the exam after a waiting period of two weeks, while others require a wait of up to sixty days. Certain programs limit the total number of attempts a student may make within a given academic year, and a few institutions require students to retake the entire exam rather than individual sections.
Understanding retake policies ahead of time allows students to approach the exam strategically. If a student knows they have limited opportunities to retake the exam, they will be more motivated to invest deeply in preparation before their first attempt. Conversely, knowing that retakes are available and affordable can reduce test anxiety and encourage students to focus on learning rather than performing under pressure. Either way, the goal is to achieve the highest possible score on the first attempt.
Time Allotted Per Section
Each section of the HESI A2 has a designated time limit, and students must complete each section within that allotted period. Time limits vary by section, generally ranging from twenty-five to fifty minutes depending on the number of questions and the complexity of the content. The reading comprehension section tends to have more generous time allowances because passages must be read and analyzed before questions can be answered. Math sections may also require more time due to calculation demands.
Effective time management is a skill that students should practice during their preparation phase, not only on exam day. Simulating real testing conditions by timing practice sessions helps students develop a sense of how long they can afford to spend on each question. If a student gets stuck on a difficult item, the best strategy is to make a reasonable selection and move forward rather than spending excessive time on a single question and risking incomplete answers in the remaining portion.
Registration and Cost
Students register for the HESI A2 through their target institution or through an approved Elsevier testing center, as Elsevier is the company that publishes and administers the exam. Registration procedures and fees vary depending on whether the exam is taken at an institutional testing site or through an external provider. Fees generally range from fifty to one hundred dollars, though some schools bundle the exam cost with application fees or allow students to pay on the day of testing.
Before registering, students should verify the exact version of the exam their target school requires, including which sections are included and any specific accommodations for students with documented disabilities. Accommodation requests typically must be submitted in advance and may require documentation from a healthcare provider or educational specialist. Planning registration well in advance of application deadlines reduces last-minute stress and ensures students have adequate time to prepare thoroughly before their scheduled exam date.
Best Preparation Strategies
Preparation for the HESI A2 should begin several weeks or months before the exam, depending on how many sections are required and how much review the student needs across the relevant subject areas. The most effective study plans are structured and consistent, dedicating specific blocks of time each week to different subjects rather than attempting to cram all material in the days before the exam. Spacing out study sessions improves long-term retention and reduces cognitive overload.
Official HESI A2 study guides published by Elsevier are among the most targeted resources available, as they are aligned directly with exam content and format. Practice tests are especially valuable because they familiarize students with the question style and help identify areas of weakness. Students should supplement these official materials with subject-specific textbooks, online video lectures, and peer study groups where discussing concepts aloud can deepen retention and reveal misunderstandings that self-study alone might not catch.
Why Scores Matter
HESI A2 scores serve as one of the primary academic filters in a competitive nursing school admissions process. Because programs often receive far more applications than they have available seats, admissions committees use standardized exam scores to rank applicants objectively. A high HESI A2 score signals that a candidate is academically prepared and serious about their professional goals, which strengthens their overall application significantly.
Beyond admission, strong performance on the HESI A2 is associated with better outcomes in nursing programs and on the NCLEX licensing exam, which students must pass after graduation to practice as registered nurses. Students who perform well on the HESI A2 often report feeling more confident entering their first semester because the exam preparation process reinforced foundational knowledge across multiple subject areas. In this way, preparing for the HESI A2 is not merely an admissions exercise but an investment in long-term academic and professional success.
Final Thoughts
The HESI A2 is a meaningful gateway into the nursing profession, designed not to discourage aspiring healthcare professionals but to ensure that those who enter rigorous programs are prepared to succeed. Every section of the exam corresponds directly to knowledge and skills that nurses apply in real clinical settings, which means thorough preparation for the exam is simultaneously preparation for the demands of nursing school itself. Students who approach the HESI A2 with discipline, curiosity, and a long-term perspective tend to perform well and carry that positive momentum into their academic careers.
Success on the HESI A2 begins with a clear plan. Students should start by identifying which sections their target programs require, obtaining official study materials, and assessing their current knowledge across all relevant subject areas. From there, a consistent and focused study schedule built around honest self-assessment will yield measurable improvement over time. It is also worth cultivating a healthy relationship with the exam itself, viewing it not as an obstacle but as an opportunity to demonstrate readiness and commitment to a rewarding career in healthcare.
For students who feel anxious about standardized testing, it may help to remember that the HESI A2 is not a test of innate intelligence but of prepared knowledge. Every concept tested on the exam can be learned, reviewed, and retained with the right effort and resources. Many successful nurses began their journey by sitting down with a study guide and committing to a few hours of focused review each week. The path forward is clear and attainable for any student who is willing to put in the work required to meet the challenge with confidence and competence. Building that foundation now through careful preparation not only improves exam performance but also lays the groundwork for a fulfilling and capable professional life in nursing and allied health care for many years ahead.
