HESI: What It Is, Sections, Scores & How to Prepare

The HESI — Health Education Systems, Inc. exam — is a standardized pre-admission assessment used by nursing schools and allied health programs throughout the United States to evaluate applicants' academic readiness before acceptance into competitive nursing programs. The most widely used version is the HESI A2 (Admission Assessment), which measures competency across academic and health science content areas that predict success in nursing school coursework.

Unlike the NCLEX-RN (which you take after graduating from nursing school), the HESI A2 is taken before you're admitted — it's a screening tool that schools use to compare applicants and set admission thresholds. Nursing programs are highly competitive, and HESI scores are one of the primary quantitative factors schools consider alongside GPA, prerequisite course grades, and letters of recommendation.

The HESI exam is currently administered by Elsevier, which acquired Health Education Systems in 2006. Schools purchase licenses and administer the exam either on campus (proctored, usually in a computer lab) or at authorized testing centers. The version of the exam your target school requires may include all eight sections or just a subset — schools choose which sections to include based on their program's prerequisites and admission criteria.

It's important to understand that there's no single universal HESI score that gets you into nursing school — each institution sets its own minimum thresholds per section, and what counts as a competitive score varies. A 75% may be the minimum at one school while a competing school in the same city requires an 85% on the same section. Researching the specific score requirements of every program you're applying to is essential before you decide how much preparation time to allocate.

This guide covers every section of the HESI A2, what each tests, typical score benchmarks, how to register, and the most effective strategies for preparation and score improvement.

One key thing to know upfront: HESI scores expire. Most schools accept scores for two years from the test date. If you've taken the HESI before but your scores have expired — or if you scored below a school's threshold and want to retake — you can retake the exam after a waiting period (typically 60 days, but this varies by institution). Some schools limit retakes; others allow unlimited attempts with mandatory wait periods. Confirm your target school's retake policy before you register.

The HESI A2 is also used as an exit exam by some nursing programs — a different context than the pre-admission use. Exit HESI exams are administered during nursing school, typically before graduation, to predict a student's likelihood of passing the NCLEX-RN. If your nursing program uses the HESI as both an admissions tool and an exit exam, the stakes are clear at both ends of your nursing education. Your score on the admission HESI is your first opportunity to demonstrate the academic readiness that will carry you through the program and ultimately to licensure.

The Mathematics section tests arithmetic, basic algebra, fractions, decimals, percentages, ratios and proportions, and basic measurement conversions. Nursing-relevant math is emphasized — dosage calculation problems, unit conversion (metric and standard), and word problems that reflect clinical scenarios appear alongside general arithmetic. A basic four-function calculator is allowed on the HESI math section; however, speed and comfort with mental math still matter because time limits apply.

The Reading Comprehension section presents passages followed by questions that test your ability to identify the main idea, draw inferences, understand implied meaning, recognize author purpose, and analyze text structure. Passages are written at a college reading level and cover topics from health sciences and general academic content. This section rewards strong academic reading habits built over time, rather than last-minute cramming — though practicing with similar passages under timed conditions improves performance.

The Vocabulary and General Knowledge section tests academic and health science vocabulary in context. Words are drawn from the kind of terminology you'll encounter in nursing school coursework — anatomical terms, pharmacological vocabulary, clinical terminology. Studying health science vocabulary lists specifically (rather than general SAT-style vocabulary) is the most efficient preparation for this section.

The Grammar section tests English grammar rules: subject-verb agreement, correct pronoun use, verb tense consistency, sentence structure, and punctuation. Non-native English speakers and candidates who haven't done formal grammar review recently benefit most from targeted grammar practice before the exam.

The science sections — Biology, Chemistry, Anatomy and Physiology, and the optional Physics section — test content at the introductory college level. Biology covers cell structure, genetics, metabolism, and basic ecology. Chemistry covers atomic structure, chemical bonding, reactions, acids and bases, and the periodic table. Anatomy and Physiology — the most heavily weighted science section for nursing admission — covers all major body systems, organ functions, and physiological processes. These science sections require genuine content review, not just test-taking strategy, because the questions assume baseline course-level knowledge.

The HESI A2 practice test questions at PracticeTestGeeks let you work through section-by-section practice for all eight HESI A2 content areas, with explanations that reinforce the content knowledge the actual exam tests.

The Physics section, when required, tests basic concepts in mechanics (force, motion, energy), thermodynamics, fluid dynamics, electricity, and optics at an introductory level. Physics is the least commonly required HESI A2 section — check whether your target programs specifically require it before dedicating study time to physics review. Radiologic technology, respiratory therapy, and some BSN programs with strong physical science components are more likely to include physics than traditional nursing programs.

HESI scores are reported as a percentage for each section, ranging from 0 to 100%. Elsevier also provides a composite score. Schools set their own minimum thresholds — typically 70% to 85% per section, with competitive programs often expecting 80%+ across all academic and science sections. A few highly competitive programs consider 90%+ on key sections to be competitive for admission.

The score categories used in HESI reporting classify performance as follows: scores below 75% indicate an area that may need improvement; 75% to 79% is considered acceptable; 80% to 89% is considered good; and 90% to 100% is considered excellent. These are Elsevier's internal benchmarks — your target school's requirements may differ. A 75% that's "acceptable" per Elsevier may still be below a specific school's 80% minimum.

The HESI practice test at PracticeTestGeeks provides full-length simulated tests across all sections that give you a realistic sense of your performance relative to these scoring thresholds. Taking a baseline practice test before beginning serious study is strongly recommended — it tells you which sections need the most attention and which are already at or above your target scores.

For the HESI A2 exam registration, you don't register directly through Elsevier. Registration is managed by the individual schools — you either register through the nursing program's admission portal, through the testing center they work with, or by contacting the program's admissions office directly. Some schools allow open testing (anyone can register to take the exam at their facility even if applying to other schools), while others restrict HESI testing to current applicants.

The hesi a2 exam registration process and test date availability varies by school, so check directly with each program you're applying to. Some programs test frequently throughout the year; others have set testing windows tied to application deadlines. Plan your test date to allow enough time for score validity (tests taken too early may expire before your application cycle) and for a potential retake if your initial scores fall below a school's threshold.

Some nursing schools release historical data on admitted student HESI scores — this is worth researching. If a program's average admitted student HESI score on a given section is 83%, and you score an 84% on a practice test, you're at or slightly above average — competitive but not comfortable.

If your practice test scores are 10+ points above average for admitted students at your target programs, you can reasonably conclude your preparation is on track. Building a target score that's 5–7 points above a program's published minimum gives you a realistic buffer for variability between practice and actual exam performance.

Effective HESI preparation follows a predictable pattern for most candidates: take a diagnostic practice test to identify weak sections, build a section-by-section study schedule focused on your gaps, use targeted practice questions weekly, and take a full-length timed practice test two weeks before your actual exam date to assess readiness.

For the science sections — biology, chemistry, and especially anatomy and physiology — review your notes or a preparation book for each section systematically. The HESI A2 tests introductory course-level content, so if you've completed these courses, focused review of the major topics and practice with exam-format questions is usually sufficient. If you haven't taken these courses recently, a longer review period or using a focused HESI prep book that covers the content explicitly is necessary.

The math section is the area where specific calculator awareness matters most. The HESI provides an on-screen calculator for math questions — but only the four basic operations. You can't use it for fractions or complex expressions. Practicing with a basic four-function calculator builds the workflow efficiency the section requires. Dosage calculation practice is particularly valuable: nursing schools weight nursing-relevant math highly, and candidates who haven't encountered dosage calculation formulas before the exam often find these questions unexpectedly difficult.

The hesi a2 examination study plan at PracticeTestGeeks provides a structured day-by-day schedule for 30-day preparation that covers all eight HESI A2 sections in a systematic sequence. The plan allocates more time to the sections with the highest admission stakes (A&P, math, vocabulary) while ensuring you don't neglect weaker areas in your rush to prepare for the harder content.

For anatomy and physiology specifically — the section that most nursing school applicants find most challenging — system-by-system review works better than random topic review. Work through each major body system sequentially: integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive. For each system, learn the organs, their functions, and the key physiological processes that regulation involves. Drawing diagrams and creating mnemonics for complex processes (like the steps of the cardiac cycle or the pathway of blood through the heart) improves retention significantly over passive reading.

For students who completed A&P more than a year before their HESI exam date, a full systematic review rather than targeted gap-filling is more reliable. Returning to A&P after a gap often reveals that concepts felt clear during the course but have degraded significantly in memory. System-by-system review rebuilds the knowledge structure — but the second pass through the material is always faster than the first, so even a comprehensive review of all 11 systems is manageable in 4–6 weeks of consistent daily study time.

Understanding the broader role of the HESI A2 in the nursing school admissions process helps you approach preparation strategically rather than treating it as an isolated exam. Schools use HESI scores alongside GPA to create a composite ranking of applicants — a strong HESI score can compensate for a somewhat lower GPA in some programs, and vice versa. Knowing approximately where you stand on each factor and which schools weight HESI scores most heavily allows you to target programs where your profile is most competitive.

Some nursing programs offer conditional admission to applicants who fall slightly below a HESI threshold, contingent on retaking and improving scores before the program start date. Others have hard cutoffs and won't consider applicants below a minimum regardless of other qualifications. Knowing which type of program you're applying to affects whether investing preparation time to significantly improve a borderline score is worth delaying your application cycle.

The hesi examination context within the broader nursing career landscape matters too. HESI scores predict success in nursing school coursework, not ultimate clinical competence — they're a signal about academic readiness for the rigors of nursing programs, not a ceiling on career potential. Candidates who struggle with the HESI A2 but invest in genuinely building the underlying academic skills (rather than just memorizing test tricks) tend to perform better in nursing school and on the NCLEX-RN after graduation.

The resources at PracticeTestGeeks provide comprehensive HESI A2 preparation across all sections — from section-specific practice tests for anatomy and physiology, chemistry, biology, math, and grammar to full-length simulated exams that replicate the pacing and format of the actual assessment. Whether you're preparing for your first attempt or looking to improve a score that fell below your target school's threshold, structured practice across all tested domains is the most reliable path to a competitive HESI A2 result.

Nursing programs are among the most competitive undergraduate admissions processes in the country — at community colleges and universities alike. Treating HESI preparation as the serious academic undertaking it is, rather than as an administrative checkbox, is what distinguishes candidates who walk into testing centers with confidence from those who walk in hoping for the best.

The difference between a 78% and an 85% on the A&P section is not luck — it's the result of 15 or 20 additional hours of systematic review and targeted practice. That investment is absolutely achievable for any motivated candidate with a structured plan and the right preparation resources.

Your HESI score is the first measurable proof that you can handle what nursing school asks of you. Make it count.