Yes, chemistry is required for nearly all nursing programs in the United States. Whether you’re pursuing a two-year associate degree (ADN) or a four-year bachelor’s degree (BSN), you’ll need to complete at least one chemistry course with a lab component before starting your nursing coursework. The specific type of chemistry course varies by school, but the requirement itself is nearly universal.
What Type of Chemistry You’ll Need
Most nursing programs require a single semester of general chemistry or introductory chemistry with a lab. This is typically a four or five credit course. At NYU’s College of Nursing, for example, the prerequisite is General Chemistry I or Inorganic Chemistry as a four-credit course with lab. Organic Chemistry and Biochemistry do not satisfy the requirement at many schools, and chemistry courses designed for non-science majors are typically not accepted either.
Some schools offer a chemistry course specifically tailored for health science students. The College of San Mateo’s nursing program, for instance, accepts either General Chemistry I (5 units) or Health Science Chemistry I (4 units). Harding University requires a course called Fundamentals of Chemistry that focuses on atoms, ions, molecules, biological substances, chemical reactions, and cellular processes. These health-focused chemistry courses cover the same foundational concepts as general chemistry but frame them around biological and clinical applications, which many nursing students find more engaging and relevant.
You won’t typically need a full chemistry sequence. One semester is standard for BSN programs, and ADN programs follow the same pattern. Accelerated BSN programs for students who already hold a bachelor’s degree in another field also require chemistry with a lab, so there’s no shortcut around it regardless of the path you choose.
Grades That Nursing Schools Expect
Passing the course isn’t always enough. Nursing programs set minimum grade requirements for prerequisite sciences, and chemistry falls under that umbrella. Concordia University Wisconsin, for example, requires at least a C in General and Biological Chemistry along with a minimum science GPA of 2.75. Many competitive programs expect higher. If you earn below the minimum, you’ll likely need to retake the course before your application will be considered.
Some nursing schools also require the HESI A2 entrance exam, which includes a dedicated chemistry section with 30 questions covering atomic structure, chemical reactions, stoichiometry, biochemistry, equilibrium, and scientific notation. Even if your program doesn’t require the HESI, strong chemistry knowledge will help you on whichever entrance exam you face.
Why Nurses Actually Use Chemistry
Chemistry isn’t just a box to check. The concepts show up repeatedly in clinical nursing practice, particularly when managing fluids, medications, and lab values.
One of the most direct applications is understanding IV fluids. Nurses need to know why a solution with 0.9% sodium chloride (called “normal saline”) behaves differently in the body than one with 0.45% or 3% sodium chloride. A solution that matches the concentration of dissolved particles in blood is isotonic and won’t shift fluid in or out of cells. A solution with a lower concentration (hypotonic) pulls water into dehydrated cells. A higher concentration (hypertonic) draws water out of cells and into the bloodstream. Choosing the wrong type can cause serious harm, and grasping the chemistry behind osmosis is what makes these decisions intuitive rather than memorized.
Acid-base balance is another area where chemistry knowledge is essential. Blood normally stays within a narrow pH range of 7.35 to 7.45. When carbon dioxide builds up in the blood, it forms an acid and drives pH down, a condition called acidosis. When pH rises above 7.45, the result is alkalosis. Nurses monitor these values, recognize when they’re off, and understand how the lungs and kidneys work to correct imbalances. None of that makes sense without a basic understanding of pH, hydrogen ions, and how gases dissolve in liquids.
Electrolyte management ties directly to chemistry as well. Sodium, potassium, calcium, and other charged particles move across cell membranes through processes like active transport, where the body spends energy to push ions against their natural concentration gradient. The sodium-potassium pump, one of the most important mechanisms in the body, is a chemistry concept you’ll revisit constantly in nursing school. Understanding it helps you recognize why a patient with low albumin (a blood protein) develops swelling, or why certain medications affect kidney function the way they do.
How to Prepare if Chemistry Feels Intimidating
If you haven’t taken chemistry since high school, or if you struggled with it then, you have options. Many community colleges offer preparatory or introductory chemistry courses that don’t count toward the nursing prerequisite but build the foundation you need. Starting there can make the required course far more manageable.
Focus your energy on the topics that matter most for nursing: solutions and concentrations, acids and bases, the behavior of ions in water, and basic atomic structure. You don’t need to master complex organic synthesis or advanced lab techniques. The chemistry nursing programs require is grounded in biology and health, not in the abstract theory that makes up much of a chemistry major’s coursework.
Taking the prerequisite at a community college is a common and accepted approach. Just verify with your target nursing program that they accept transfer credits from the institution you choose, and confirm the specific course number qualifies. Some programs maintain a list of approved courses or require that the course include a hands-on lab component, not just lecture hours.