The HESI isn't one test. It's a family of nursing exams built by Elsevier, and most candidates run into either the admissions version (HESI A2) or the program exit version (the Exit Exam). The wrapper most people search for — the HESI study guide — really means "what should I actually study, and in what order, before I take this thing." That's the question this guide answers.
Here's the short version. You'll see five academic sections on the A2 — math, reading, vocabulary, grammar, and either A&P or biology depending on your program — plus a learning-style and personality profile that doesn't affect your score. Pass marks live between 75 and 80 for most schools. The exit exam is different beasts entirely; it's longer, scored 0–1500, and predicts NCLEX readiness. Knowing which one you're sitting matters more than any study trick.
Most nursing applicants underestimate the HESI A2 until they sit a timed mock. The math isn't hard. Reading isn't tricky. But put them back-to-back at exam pace, with vocabulary you've never seen, and the brain starts skipping questions. So the plan we walk through below isn't about memorising 4,000 vocabulary cards. It's about building stamina across five sections, calibrating against a real HESI practice test, and fixing the two sections that bleed the most points.
One more framing thing before we dive in. The candidates who pass the A2 on a first attempt aren't the smartest in the room. They're the ones who took the cold mock in week one without flinching, then spent five weeks fixing exactly what the mock revealed. Smart prep beats long prep — every single time on this exam.
The A2 has up to nine subsections, but your school picks which ones count. Math is always included — and it's pre-algebra, not calculus. You'll do basic operations, fractions, decimals, percentages, ratios, household-to-metric conversions, dosage calculations, and a sprinkle of algebra. Calculators are built in. Reading comprehension throws short passages at you with main-idea, inference, and vocabulary-in-context questions. Vocabulary leans medical and health science. Grammar checks parts of speech, sentence structure, and common errors. The science sections (A&P or biology, sometimes chemistry or physics) are program-specific.
The exit exam, by contrast, mirrors NCLEX. It uses an HESI proprietary score (HPS) on a 0–1500 scale, and most schools want 850 or higher to clear you for the real licensure test. That's a different study problem — it's about clinical judgment, not arithmetic — and we cover it briefly in the HESI Exit Exam section below. For now, assume "HESI" means A2 unless your program told you otherwise.
One quick note on what isn't on the test. The A2 doesn't test pharmacology, dosage protocols, or NCLEX-style critical thinking. So those nursing-school review books? They're not your friend yet. You want a guide focused on entry skills, not exit ones.
HESI A2 (admissions) and HESI Exit Exam are different tests with different prep paths. The A2 is pre-college academic skills; the Exit Exam is NCLEX-style clinical judgment. Make sure you know which one you're sitting before you build a plan.
Pass marks vary, and that matters because chasing a 95 when your school wants 75 is wasted prep. Community college nursing programs typically require a 75 composite. Four-year BSN programs ask for 80. Competitive accelerated BSN tracks — the ones where 400 people apply for 40 seats — quietly want 85 or higher. Many programs also require minimums per section, not just on the composite, so a 95 in math won't rescue a 68 in vocabulary.
Read your school's nursing handbook. Not the website blurb — the handbook PDF. It'll list the section-by-section minimums and whether you can retake (most allow one retake after a 30 to 60 day wait). Some accept superscoring across attempts. Some don't. You need this information before you book.
If you're applying to multiple programs, target the highest score across all of them. A single sitting that clears every threshold beats two retakes. Our HESI A2 study guide and section-specific drills line up to a 90+ benchmark if you want that headroom.
Composite 75 minimum is typical for two-year associate degree in nursing programs. Some sections may have 70 floors that override the composite. One retake is usually allowed after 30 days. Sections are often weighted equally rather than science-heavy. Strong applicants land in the 80-85 range to stay competitive in waitlist-heavy programs that admit by score ranking.
Composite 80 standard for traditional bachelor of science in nursing tracks. Section minimums often 75 each — so a single weak area can fail you even if your composite clears the threshold. Competitive applicants land 85 or higher to stay in contention for admissions decisions. Many programs publish a recommended composite separately from the absolute minimum.
Composite 85+ to be competitive in 12 to 18 month accelerated bachelor tracks for second-degree students. Some programs use HESI as a primary admissions filter and superscore across attempts when allowed. These programs often have 10:1 application ratios, so a strong HESI is one of the few objective levers applicants control directly.
Composite 70-75 common for licensed practical nurse and licensed vocational nurse programs. Math and reading are often weighted more heavily than science sections in final ranking. Some schools accept TEAS interchangeably with HESI A2 for LPN admissions — confirm with the specific program rather than assuming.
Six weeks is the sweet spot for most working students. Four weeks is doable if you've got recent academic chops. Eight weeks helps if you've been out of school more than two years. The plan below assumes 8 to 10 hours per week — that's roughly 90 minutes a day, five days a week, plus a longer weekend session.
Week 1 — Baseline. Sit a full-length HESI practice exam under timed conditions. Don't study before it. Just take it cold. Score it. The point is to find your two weakest sections, not to feel good about yourself. Most people land between 68 and 78 on a cold run. That's normal.
Week 2 — Math foundations. If math came back below 80, this week is yours. Drill fractions to decimals, percent conversions, and ratio-proportion problems. Then move to metric conversions and dosage problems (mg/kg, drops per minute, IV rates). One hour a day, mixed reps, no calculator for the first 20 minutes of each session. Your HESI test prep hub has section-specific question sets.
Week 3 — Reading and vocabulary. Reading is timing more than skill. Read three passages a day, set a 3-minute clock per passage, force yourself to commit. Vocabulary is volume — flashcards 20 minutes a day, focus on health-science words (palpate, exacerbate, edema, supine, distal). Anki or Quizlet, doesn't matter, just use one.
Week 4 — Science. If your program wants A&P, focus on body systems with the highest yield: cardiovascular, respiratory, nervous, musculoskeletal. Biology programs need cell structure, genetics basics, and basic physiology. Six hours total across the week is plenty if you've taken the courses before. Double it if you haven't.
Week 5 — Grammar and weak spots. Grammar usually doesn't need a full week, but it does need attention. Two days on grammar drills (subject-verb agreement, modifiers, parallel structure), then three days revisiting whichever two sections still feel shaky. The trap here is over-studying your strong areas because they feel good. Don't.
Week 6 — Full mocks. Two full-length timed mocks, 48 hours apart, then targeted review the days in between. The second mock should score 5 to 10 points higher than the first. If it doesn't, you're studying wrong — usually too passive, too much reading, not enough doing.
Week 1 — Baseline mock. Take a cold full-length mock under timed conditions before any studying. Score it carefully. Flag the two weakest sections — they get prep priority for the next four weeks. Don't peek at answers before you finish each section, or you'll skew the diagnostic.
Week 2 — Math foundations. Fractions, decimals, percent conversions, metric and dosage calculations. One hour a day, no calculator for the first 20 minutes. Daily reps beat weekend marathons here.
Week 3 — Reading and vocabulary. Three passages a day at 3 minutes per passage. Vocabulary flashcards 20 minutes daily, focused on health-science words mined from your mock review, not generic word lists.
Week 4 — Science. A&P programs need cardiovascular, respiratory, nervous, musculoskeletal coverage. Biology programs focus on cell structure, basic genetics, and physiology. Six total hours across the week is enough if you've taken the courses recently.
Week 5 — Grammar and weak spots. Two days on grammar drills (subject-verb agreement, modifiers, parallel structure), then three days revisiting whichever two sections still feel shaky. Resist the urge to drill comfort areas.
Week 6 — Full mocks. Two full-length timed mocks 48 hours apart, with targeted review between them. The second mock should beat the first by 5-10 points; if not, prep style needs adjustment.
Math. Build a personal cheat sheet of conversions you keep missing — pounds to kilograms, Fahrenheit to Celsius, teaspoons to millilitres. Drill them daily for a week and they stick. For dosage problems, write the unit you want on the right and cancel units left-to-right. It looks slow. It prevents the panic-multiply error that costs 4 to 6 points on test day.
Reading. Read the questions before the passage if you're a slow reader. Counter-intuitive but it works for about half of students. Try both approaches in week 1 mocks and stick with what scores higher. Don't get lured into answer choices that "sound smart" — HESI loves to bait with technical-sounding distractors.
Vocabulary. Build the list from your wrong answers, not from a generic "1,000 HESI words" PDF. Most premade lists are stuffed with words you'll never see. Mine the question reviews from your mocks instead.
Grammar. The single biggest gain comes from sentence-correction practice. Twenty questions a day for two weeks, reviewed honestly, lifts most candidates from 75 to 88. Pronoun reference and verb tense agreement are the two most common error types on the A2.
A&P / Biology. Diagrams beat text. If you can sketch the cardiac conduction pathway from memory and label the major arteries, you're close to test-ready. Use a colouring book (seriously — anatomy colouring books work) rather than re-reading textbooks.
Bring two forms of ID. Schools vary on whether you can bring a snack — check. The on-screen calculator is basic, so practise with a calculator that has only those buttons (most phone calculators in basic mode work). You get one short break between sections. Use it. Walking 90 seconds resets your attention better than scrolling Instagram.
Each section is independently timed, and once you move on, you can't go back. So if you're stuck on a math question at the 40-second mark, guess and move. Coming back is not an option, and one bombed question is way better than five rushed ones at the end.
Scores appear immediately after you finish. Print or screenshot them. Some schools want the official report uploaded; some pull it directly from Elsevier. Your testing centre will tell you.
If you're searching for "HESI study guide" near the end of nursing school, you probably mean the HESI Exit Exam, not the A2. That's a different ball game. It predicts NCLEX-RN or NCLEX-PN performance, runs 150 questions, and uses the proprietary 0–1500 score. Most programs treat 850 as a pass; some go higher.
The prep is fundamentally different. You're not reviewing pre-algebra. You're doing clinical judgment items — prioritization, delegation, safety, medication administration — under NCLEX-style stems. The HESI test family includes specialty exit exams (med-surg, peds, OB, mental health) that work the same way.
Stick to NCLEX-style review banks (UWorld, Kaplan, HESI's own remediation modules) and case studies. Practice tests for the exit exam should be done in sets of 25 to 75, not full mocks, because volume of varied questions trains the pattern recognition that scores well on these tests.
The biggest one? Studying passively. Watching review videos isn't studying. Re-reading chapters isn't studying. Doing questions, getting them wrong, understanding why, and re-attempting them — that's studying. If you can't recall what you "learned" two days ago without prompts, you didn't learn it.
Second mistake: skipping the timed mocks. Practice without a clock builds false confidence. Even one timed mock per week corrects pacing better than a hundred untimed problems.
Third: over-investing in one section. Most candidates spend 60% of their hours on math because it feels concrete and improvable. Meanwhile vocabulary stays at 70 and tanks the composite. Spread your time roughly proportional to your weakness, not your comfort.
Fourth: cramming the week before. Diminishing returns hit hard after week 5. The last three days should be light review, sleep, and logistics — not 14-hour study marathons. Tired brains take tests badly.
Most candidates need one full-length question bank, a vocabulary set, and a math drill source. That's it. The free PDFs floating around online are mostly recycled from 2014 and don't match the current question style. The HESI A2 exam question pool was refreshed in 2022, so anything older skews wrong.
Mometrix and Trivium publish solid printed guides. Pocket Prep and UWorld run good apps. ATI's own HESI A2 study materials are pricey but match the exam closely if your program has site licenses. Your library probably has a copy of Saunders or Davis's HESI guide — borrow before buying.
For free practice, the HESI A2 practice test bank here gives section-level drills with explanations. We update questions quarterly to match the current exam format.
About 30% of A2 candidates retake at least one section. That's not failure — it's normal. If you scored within 5 points of your school's minimum, retake the weak section after 30 days and study only that section. If you bombed multiple sections, take a full eight weeks and restructure from scratch. Don't retake in two weeks hoping for a miracle.
One pattern that helps: people who fail the first time and then over-study end up scoring lower on the retake from test anxiety. So the goal of a retake isn't to master more material — it's to walk in calmer, having ironed out one specific weakness.
Wait out the mandatory 30 to 60 day cooling period. Retake only the failing section if your school allows section-level retakes. Drill 20 questions a day in that area, review every wrong answer the same evening, and re-do your timed mock the week before the retake to confirm pacing has improved.
Pause and rebuild from week 1 of the plan. Eight full weeks of restructured prep beats a rushed retake every time. Use the gap to identify whether the issue is academic gaps, pacing, or test anxiety — each requires a different fix and lumping them together wastes the second sitting.
Take an honest look at what went wrong. Test anxiety, fatigue, and life stress can compound and tank an entire sitting. Fix those root causes alongside the academic prep — a sleep-deprived brain doesn't pass HESI no matter how many practice questions you've drilled.
These respond fastest to volume. Two weeks of daily passages at 3 minutes each and 30 minutes of focused flashcards usually shifts these sections 5 to 8 points. Mine vocabulary from your own wrong answers — generic 1,000-word lists rarely overlap with what HESI actually tests.
Your program might accept either HESI A2 or TEAS (ATI's competing exam). They overlap heavily but score differently. HESI gives section percentages and a composite. TEAS uses a percentile and a national average. If both are offered, pick the one your program weights more heavily — sometimes one is just for placement, the other for admissions ranking.
Some programs run an in-house version called the HESI INET. Same publisher, slightly different sections. Check your program's specific requirements rather than assuming a generic "HESI" prep guide covers it.
A HESI study guide that works isn't the thickest book or the longest course. It's a six-week plan, two timed mocks, daily question reps, and honest weakness-tracking. Most candidates pass on the first attempt with 8 to 10 weekly hours and a structured approach. The ones who fail usually didn't take a baseline mock, or they over-studied math and ignored vocabulary. Don't be that candidate. Take the cold mock this week, find your two weakest sections, and build from there.
One last thing. Your nursing application is bigger than this score. Strong essays, real recommendation letters, and the right shadowing hours all matter. But the HESI is the one item on the file that's fully in your hands and fully objective.
Get it right and you remove the easiest reason for a school to say no. Eight to ten hours a week for six weeks — that's the whole price tag. Block the time. Take the mock. Fix the weak sections. The plan isn't fancy and it doesn't need to be — it just needs to be the plan you actually do.