HESI Math Test Overview

The HESI (Health Education Systems, Inc.) A2 exam is a standardized admissions test used by nursing and allied health programs across the United States. The Math section is one of its core components, designed to assess whether prospective students have the quantitative skills necessary to succeed in healthcare education.

Purpose and Context

The HESI Math section evaluates a student’s ability to perform calculations that are directly relevant to clinical practice — such as dosage calculations, unit conversions, and basic arithmetic — alongside general math competency. Schools use the score to predict academic readiness for nursing or health science programs.

Test Format

The Math section typically consists of 50 questions, though some institutions may administer a shorter version. It is computer-based and timed, generally allowing 50 minutes (roughly one minute per question). Questions are multiple choice. Calculators may or may not be permitted depending on the testing institution’s policy — you should confirm this with your specific school beforehand, as it significantly affects preparation strategy.

Topics Covered

The HESI Math test covers a broad range of foundational and applied math topics:

Basic Arithmetic This is the foundation of the test. You’ll need to add, subtract, multiply, and divide whole numbers confidently and quickly, including operations with larger numbers and negative integers.

Fractions Expect questions on simplifying fractions, finding common denominators, and performing all four operations with fractions — both proper and improper. Mixed numbers are also included.

Decimals You should be comfortable converting between fractions and decimals, rounding decimals, and performing operations with them. Precision matters here, as small errors can compound.

Percentages Questions involve converting between percentages, decimals, and fractions, as well as solving for percent increase/decrease, finding what percent one number is of another, and calculating a percentage of a value.

Ratios and Proportions These appear frequently and are especially important for healthcare contexts. You’ll set up and solve proportions and interpret ratios correctly.

Dosage and Drug Calculations Some versions of the test include clinical math scenarios — such as calculating how many tablets to administer given a prescribed dose and an available dose, or how many mL per hour to set an IV drip. These bridge pure math and real-world nursing application.

Roman Numerals A somewhat unique feature of the HESI, Roman numerals appear because they are still used in some prescription writing. You should be able to convert between Roman and Arabic numerals, including less common combinations.

Military Time Converting between standard 12-hour time and 24-hour (military) time is tested, as military time is standard in clinical documentation.

Measurement Conversions You’ll need to convert within and between the metric system (grams, liters, meters) and household/apothecary systems (pounds, ounces, teaspoons, tablespoons, cups). Common conversions like 1 kg = 2.2 lbs, 1 tsp = 5 mL, and 1 oz = 30 mL are frequently needed.

Basic Algebra Expect simple one- and two-step equations where you solve for an unknown variable. Problems are generally straightforward and don’t venture into advanced algebra.

Word Problems Many questions are embedded in real-world or clinical scenarios rather than presented as abstract equations. Strong reading comprehension alongside math skills is important.

Scoring

HESI scores are reported on a scale of 0–100% (not a raw point scale). Most programs require a minimum score of 75% in the Math section, though competitive programs may set the cutoff at 80% or higher. Some schools average section scores and set a cumulative minimum. You should verify the specific requirement for any program you’re applying to.

How It Compares to Other Sections

The Math section is generally considered one of the more manageable sections of the HESI A2 by most test-takers, particularly those who are comfortable with basic arithmetic and fractions. The challenge lies primarily in the variety of question types (particularly Roman numerals, military time, and measurement conversions, which are easy to overlook in preparation) and the clinical application angle that sets it apart from a standard math test.

Preparation Tips

Master the fundamentals first. The bulk of the test rests on fractions, decimals, and percentages. If these feel shaky, dedicate serious time to them before moving on.

Memorize key conversions. You won’t have time to derive metric-to-household conversions on the spot. Flashcards work well for common ones.

Practice Roman numerals and military time. These are narrow topics but easy points if you prepare specifically for them.

Simulate timed conditions. One minute per question is a tight pace. Practicing under time pressure will help you develop speed and identify where you’re losing time.

Use HESI-specific study materials. The official HESI Admission Assessment Exam Review guide (published by Elsevier) is the most authoritative resource and includes practice questions with rationales.

Don’t neglect word problems. Practice extracting the relevant numbers from a sentence and identifying which operation to apply — this is a skill in itself.

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Overall, the HESI Math section rewards solid foundational preparation and familiarity with its specific quirks (Roman numerals, clinical conversions, military time). With focused study over two to four weeks, most students find they can reach or exceed the required cutoff score.