Free HESI A2 study guide

HESI A2 Study Guide

Start by finding out which subjects your programme actually assigns. The HESI A2 is built per school from a menu of subject exams, so two applicants can sit completely different papers under the same name. Once you know your list, work the subjects below in the order that matches it.

Last updated August 2026

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  • Every subject we cover
  • Written to the Elsevier subject list

Math

4 topics · 250+ practice questions

HESI A2 Math is applied arithmetic rather than algebra for its own sake. Almost every question is framed the way a nurse meets it, which is why ratios, proportions and conversions carry most of the section.

Read the Math guide

Reading Comprehension

16 topics · 250+ practice questions

Passages are health-related but assume no clinical knowledge. Everything needed is in the text, so the skill being tested is finding it accurately under time pressure rather than knowing it in advance.

Read the Reading Comprehension guide

Vocabulary

9 topics · 250+ practice questions

Vocabulary leans towards words used in health settings, and towards words whose everyday meaning is not the one a clinician intends. Affixes are the highest-value topic here for the time they take.

Read the Vocabulary guide

Grammar

7 topics · 100+ practice questions

Grammar is tested where it changes what a sentence means rather than where it is only a matter of style. Agreement, punctuation and modifier placement carry most of the section.

Read the Grammar guide

Anatomy and Physiology

16 topics · 100+ practice questions

The heaviest subject for most candidates and the one worth starting earliest. Work one body system at a time and finish it before moving on: partial knowledge of every system scores worse than solid knowledge of most of them.

Read the Anatomy and Physiology guide

Biology

13 topics · 150+ practice questions

Foundational rather than advanced. If your last biology class was some years ago, this is the subject where a fortnight of steady work moves a score the most.

Read the Biology guide

Find out which subjects you sit

This is the single most valuable thing you can do before revising. Elsevier publishes a menu of subject exams; your nursing programme picks from it. Studying a subject you were never assigned is the most common way HESI candidates waste a fortnight.

  • Check your programme's admission page for a named subject list.
  • If it is not published, email admissions and ask which components you sit and how long you get.
  • Ask whether they require a minimum on each subject, or only an overall figure.
  • Confirm how many attempts you get and how long you must wait between them.

The full subject menu lists every component a programme can assign, and marks which of them our course covers.

Some programmes add Chemistry or Physics. If yours does, plan for them separately: they are the two subjects candidates most often discover late.

What order to study in

Sit a mixed set across your assigned subjects first, before revising anything. An evening spent finding out where you actually stand is worth more than an evening spent revising the subject that feels weakest, which is usually not the one costing you the most marks.

  1. Confirm your subject list with admissions.
  2. Sit a timed mixed set and read every rationale, including on the questions you got right.
  3. Give the weakest two subjects most of your remaining time.
  4. Move to full-length timed sets in the final fortnight.

The six-week HESI study plan sets that out week by week, and the HESI cheat sheet collects the facts worth carrying into the final few days.

Reading the guide is not the same as retaining it.

Sit a timed set across your assigned subjects and read the rationale on everything you miss.

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  • Rationale on every question