HESI A2 vs TEAS 7: Which Nursing Entrance Exam Is Harder?

Ask ten nursing students whether the HESI A2 or the ATI TEAS 7 is harder and you will get ten different answers — because they are answering a question about themselves, not about the exams. The two tests cover overlapping material but are built very differently: one is a fixed, tightly timed exam that everyone takes in full, the other is a modular battery your school assembles from a menu of sections. This guide puts them side by side — structure, content, timing, and scoring — so you can figure out which one is harder for your strengths and the program you are applying to.

The short answer

Neither exam is objectively harder. In practice, most students find that:

• The TEAS 7 is harder on pacing and science breadth. It is one long sitting with strict per-section time limits, and its science section moves quickly across anatomy and physiology, biology, chemistry, and scientific reasoning.
• The HESI A2 is harder on vocabulary and on section-level cutoffs. Programs often set a minimum for each required section, so a single weak area can sink an otherwise strong result — and if your school requires Anatomy & Physiology, Biology, and Chemistry as separate sections, the science load is deeper than the TEAS.

There is also a practical point worth saying early: you usually do not get to choose. Your program picks the exam, and many programs accept only one. Comparing the two matters most when you are applying to several schools that accept different tests, or when you are deciding where to spend limited study weeks.

Format head-to-head

This is the biggest structural difference, and it drives almost everything else.

ATI TEAS 7 — fixed and identical for everyone:

• 170 questions, 209 minutes total, taken in one sitting.
• Reading — 45 questions, 55 minutes
• Mathematics — 38 questions, 57 minutes
• Science — 50 questions, 60 minutes
• English and Language Usage — 37 questions, 37 minutes
• A portion of the items are unscored pretest questions mixed in; you cannot tell which, so treat every question as if it counts.
• Each section is timed separately. Run long on Reading and you do not get that time back.

HESI A2 — modular, assembled by your school:

• A menu of sections including Math, Reading Comprehension, Vocabulary and General Knowledge, Grammar, Biology, Chemistry, Anatomy & Physiology, and Physics. Your program chooses which ones you must take.
• Each academic section runs roughly 50 questions, a few of which are unscored pilot items.
• Some schools also assign the Learning Style and Personality Profile modules. These are not scored for admission — do not lose sleep over them.
• Timing is set by the school rather than by a single national rule. A full battery commonly runs around four hours, and per-section time is generally less punishing than the TEAS.

What this means for you: a three-section HESI is a much smaller exam than the TEAS. A seven-section HESI is a much bigger one. Before you compare difficulty, find out exactly how many sections your program requires.

Content differences that actually matter

Both exams test reading, math, English, and science at roughly a high-school level. The differences are in emphasis.

Math. TEAS math covers numbers and algebra plus measurement and data — expect equations, proportions, unit conversions, and interpreting charts. HESI math leans more nursing-practical: basic operations, fractions and decimals, ratios and proportions, percentages, household-to-metric conversions, military time, and Roman numerals. Both provide an on-screen calculator, so the challenge is setting the problem up correctly, not arithmetic speed.

Science. The TEAS bundles everything into one 50-question section, and the largest share of it is human anatomy and physiology, with smaller amounts of biology, chemistry, and scientific reasoning. The HESI splits science into separate sections — so if your school requires A&P, Biology, and Chemistry, you are facing roughly 150 science questions instead of 50, at greater depth. That single fact is why many students who have taken both call the HESI harder.

English. TEAS folds grammar, punctuation, sentence structure, and vocabulary into one English and Language Usage section. HESI separates Grammar from Vocabulary and General Knowledge, and its vocabulary section is a genuine memorization task — a mix of everyday words and medical terminology. Students who read widely tend to breeze through it; students who do not tend to find it the single hardest section on either exam.

Reading. Both test main idea, inference, author’s purpose, and following written directions. The TEAS adds real pressure: 45 questions in 55 minutes is about 73 seconds per question, including reading the passage.

How each exam is scored

This is where the two diverge in a way that changes your strategy.

TEAS 7 reports a total score (your percentage of scored items answered correctly), separate content area scores for each of the four sections, sub-content breakdowns, percentile ranks, and an academic preparedness level. Most programs quote a minimum total score, and many fold that score into a points formula alongside GPA. A weak section can often be absorbed by strong performance elsewhere.

HESI A2 reports a percentage score for each section plus a cumulative average. Many programs look for something in the 75–80% range, and — critically — a lot of them apply that minimum to every required section, not just the average. Score 92% on A&P and 68% on Vocabulary and you may still be turned away.

Two things are true of both exams:

• There is no official national passing score. Every requirement you will ever meet is set by the nursing program, not by ATI or Elsevier.
• There is no penalty for guessing. Never leave a question blank on either test.

Retake rules — how many attempts you get, how long you must wait, and which attempt counts — are also set by the school. Confirm them before your first attempt, not after.

Which one is harder for you?

Run yourself through this honestly. Each point is a reason one exam will feel harder than the other.

• You freeze under a clock. The TEAS will feel harder — its per-section limits are unforgiving.
• You took A&P recently and did well. A HESI battery heavy on A&P plays to your strength; the TEAS gives that knowledge less room to show up.
• Vocabulary is not your thing. The HESI will feel harder, and Vocabulary and General Knowledge is where you should start studying.
• You are strong overall but have one weak subject. The TEAS is friendlier, because a total-score requirement lets your strong sections carry the weak one. Per-section HESI cutoffs do not.
• Your school requires only three HESI sections. That is a substantially shorter exam than the TEAS — less material, less fatigue, fewer chances to lose points.
• You have not taken chemistry or physics. Check your school’s HESI section list carefully. Those sections exist, and if they are required, they need dedicated study time.

How to prepare for either one

The prep strategy is nearly identical. Only the content mix changes.

1. Confirm the exact requirement first. Which exam, which sections, what minimum score, whether section minimums apply, how many attempts, and how long scores stay valid. Read the current admissions page for your entry term, then confirm with an advisor.
2. Take a timed practice test before you study. A diagnostic tells you where your points are actually leaking, which is almost never where you assume.
3. Spend your time on the weakest required section, not the one you enjoy. This is the single highest-return decision in your whole study plan.
4. Read every rationale — on the questions you got right as well as wrong. Getting an item right for the wrong reason is a failure waiting to happen.
5. Practice under real time limits. Especially for the TEAS. Untimed practice will make you overconfident about pacing.
6. Build vocabulary daily if you are taking the HESI. Ten to fifteen words a day for a few weeks beats one panicked weekend.
7. Review A&P either way. It is the heaviest science content on the TEAS and a full standalone section on the HESI.

Bottom line: stop asking which exam is harder in the abstract. Find out which one your program requires and exactly which sections it includes, take a timed practice test to see where you stand, and spend your weeks on the sections that are costing you points. That plan works for either exam.