10 Free Online Chemistry Courses 2027

Chemistry is often called the “central science” because it connects physics, biology, and environmental science. Whether you’re studying matter at the atomic level or exploring how substances interact, chemistry provides the foundation for understanding the world around you.

Free online STEM classes make it easier to build this foundation without enrolling in a full degree program. As you explore your options, you’ll find courses that cover everything from atomic structure and chemical reactions to thermodynamics and materials science.

Are There Free Online Chemistry Courses?

Yes, there are many free online chemistry courses available through universities and open learning platforms. These courses often cover core topics such as atomic theory, chemical bonding, and reaction mechanisms.

Some courses are designed as full “General Chemistry” sequences, while others focus on specific areas like analytical chemistry or materials science. This variety allows you to build a broad understanding or dive deeper into particular topics.

Can I Learn Chemistry Online for Free?

Yes, you can learn many fundamental chemistry concepts online for free, especially through platforms like Coursera, edX, and OpenCourseWare. These courses typically include lectures, problem sets, and real-world examples.

While free courses can provide a strong foundation, more advanced study or professional pathways may require formal education. Still, they are an excellent way to build knowledge, prepare for exams, or explore an interest in science.

Best Free & Low-Cost Chemistry Courses

Free and low-cost online chemistry courses can help you build foundational knowledge or explore specialized topics before committing to a degree program. These options cover atomic structure, chemical reactions, thermodynamics, analytical methods, and the chemistry of materials and living systems.

Some providers offer complete courses for free, while others charge for full access or completion certificates. Check the enrollment options carefully, since a free preview does not necessarily include the entire course.

1. Duke University (Coursera) – Introduction to Chemistry: Structures and Solutions

Duke University’s Introduction to Chemistry: Structures and Solutions covers atomic and molecular structure, chemical bonding, phases of matter, and solutions. The course combines explanations, demonstrations, and quantitative problems to help learners connect molecular properties with observable behavior.

You can study at your own pace, although familiarity with basic chemistry will make some topics easier to follow. Coursera offers free previews of most courses, but full access and a certificate generally require payment unless another enrollment option or financial aid is available; completing this course does not earn Duke academic credit.

2. The Open University (OpenLearn) – Discovering Chemistry

Discovering Chemistry is a free introductory course covering atoms, the periodic table, chemical bonding, molecular shapes, and chemical reactions. It also explains chemical formulas, balanced equations, and the calculations used to count atoms and prepare solutions.

The course includes eight sessions with approximately 24 hours of study in total. By creating a free OpenLearn account and meeting the completion requirements, you can earn a statement of participation and a digital badge at no cost.

3. Khan Academy – High School Chemistry

Khan Academy’s High School Chemistry course provides a free foundation in atoms, periodic trends, bonding, chemical reactions, and stoichiometry. Additional units cover states of matter, thermochemistry, solutions, acids and bases, and reaction rates and equilibrium.

The course organizes concepts into individual skills, making it useful for reviewing specific topics or working through a broader learning sequence. It is particularly suitable for learners preparing for introductory college chemistry or rebuilding knowledge from earlier science classes.

4. Khan Academy – AP/College Chemistry

Khan Academy’s free AP/College Chemistry course explores atomic structure, molecular and ionic compounds, intermolecular forces, and chemical reactions. It also includes kinetics, thermodynamics, equilibrium, and acid-base chemistry, providing a more demanding progression beyond introductory study.

Practice activities and a course challenge help you identify topics that need additional review. The material supports AP Chemistry preparation and introductory college-level study, although using the course does not itself award college credit.

5. The University of Tokyo (edX) – Basic Analytical Chemistry

The University of Tokyo’s Basic Analytical Chemistry introduces methods for obtaining and interpreting chemical measurements. It emphasizes quantitative problem solving, analytical techniques, and evaluating the accuracy and precision of experimental data.

Applications connect the material to life sciences, environmental science, and geochemistry. The course is listed as self-paced, with a paid option advertised at $59; review the current enrollment choices for audit access and certificate terms before signing up.

6. MIT (OpenCourseWare) – Introduction to Solid State Chemistry

MIT’s Introduction to Solid State Chemistry connects general chemistry principles with the properties and uses of solid materials. Topics include electronic structure, chemical bonding, crystals, metals, glasses, semiconductors, polymers, and biomaterials.

The freely available course materials support independent study and are especially relevant if you are interested in materials science or engineering. OpenCourseWare provides educational resources rather than enrollment in an MIT class, so studying the materials does not earn an MIT certificate or academic credit.

7. Duke University (Coursera) – Introduction to Chemistry: Reactions and Ratios

Duke University’s Introduction to Chemistry: Reactions and Ratios focuses on chemical reactions, stoichiometry, nomenclature, and the periodic table. Lessons introduce measurement, matter, energy, and chemical calculations, with demonstrations that connect explanations to observable changes.

The course is designed for learners with limited chemistry experience, but a strong foundation in algebra is helpful for solving its problems. Free previews let you explore most Coursera courses, while full access and a completion certificate generally require a paid enrollment option or approved financial aid.

8. MIT (OpenCourseWare) – Principles of Chemical Science

MIT’s Principles of Chemical Science provides a broad introduction to the chemistry of biological, inorganic, and organic molecules. It covers atomic and molecular electronic structure, thermodynamics, acid-base and redox equilibria, chemical kinetics, and catalysis.

The course expects approximately one year of high school chemistry, making it better suited to learners who already understand the basics. Its free OpenCourseWare materials offer a substantial resource for independent study, but they do not include an MIT completion certificate or academic credit.

9. Rice University (Coursera) – General Chemistry: Concept Development and Application

Rice University’s General Chemistry: Concept Development and Application develops chemical principles through experimental observations and scientific reasoning. Its topics span atomic theory, bonding, gases, reaction kinetics, equilibrium, and thermodynamics, emphasizing why concepts work rather than simply asking you to memorize them.

The course uses a free online textbook and allows learners to study at their own pace. Unlike many Coursera offerings, its course-specific FAQ states that all features are free, although no certificate, credential, or completion report is awarded.

10. Kyoto University (OpenCourseWare) – The Chemistry of Life

Kyoto University’s The Chemistry of Life explores the intersection of chemistry and biology through topics such as DNA, RNA, amino acids, proteins, and fluorescent molecules. It also examines how chemical tools can help researchers investigate and influence biological processes.

Originally offered through edX, the course is now available as lecture videos through Kyoto University OpenCourseWare. These materials provide a free self-study resource for exploring chemical biology, with a focus on molecular applications and generating research ideas rather than a conventional general chemistry sequence.

How We Rank Courses

We evaluate chemistry courses based on how well they explain foundational concepts and support long-term learning. The goal is to highlight programs that balance clarity, depth, and real-world relevance.

• Affordability: We prioritize courses that are free or offer strong value with optional certification.
• Online availability: Courses must be accessible and flexible for self-paced or remote learning.
• Course provider reputation: We consider universities and platforms known for high-quality science education.

What You’ll Learn in an Online Chemistry Course

Chemistry courses focus on understanding matter at the atomic and molecular level, along with how substances interact and change. Many programs combine theoretical concepts with problem-solving exercises to help reinforce learning.

You may gain skills such as:

• understanding atomic structure and periodic trends
• analyzing chemical reactions and stoichiometry
• exploring thermodynamics and reaction rates
• interpreting chemical equations and data
• learning basic laboratory concepts and analytical techniques
• connecting chemistry to real-world systems like materials and biology

Many learners build these skills through self-paced online courses, which allows them to revisit challenging topics and practice at their own pace.

How Much Do Online Chemistry Courses Cost?

Many chemistry courses are available for free when you audit them through platforms like Coursera, edX, or OpenCourseWare. These options typically provide full access to lectures and course materials without requiring payment.

If you choose to earn a verified certificate, costs can vary depending on the provider and course structure. You can take free online classes for adults to strengthen foundational knowledge before advancing.

Who Should Consider Free Online Chemistry Courses?

These courses are a great fit if you’re studying science, preparing for exams, or exploring a potential career in a STEM field. They provide a strong foundation for students in chemistry, biology, engineering, and related disciplines.

They’re also useful for professionals or lifelong learners who want to better understand scientific concepts. Building a solid chemistry background can support further study in many technical fields.

Career Outlook for Chemistry Learners

Chemistry is a foundational subject that supports a wide range of careers, including healthcare, engineering, environmental science, and research. Understanding chemical principles is often essential for advanced study in these areas.

While online courses are typically just the first step, they can help you build the knowledge needed for academic or professional growth. With further education, chemistry can lead to diverse and rewarding career paths.

How to Choose the Right Free Chemistry Course

Choosing the right course depends on your experience level and learning goals. Taking a structured approach can help you build a strong and lasting understanding of the subject.

Start With Core Concepts

Look for courses that cover atomic structure, bonding, and reactions before moving into more advanced topics. These fundamentals are essential for understanding all areas of chemistry.

Focus on Conceptual Understanding

Choose courses that explain the “why” behind chemical behavior, not just formulas or memorization. This approach can make it easier to apply your knowledge in new situations.

Build Gradually Over Time

Chemistry can be complex, so it’s helpful to progress step by step. Selecting courses that build on each other can help you avoid feeling overwhelmed.

FAQs About Free Online Chemistry Courses

If you’re getting started with chemistry, you may have questions about how these courses work and what they can help you achieve. Here are some helpful answers to guide your learning.

Can These Courses Help You Prepare for AP Chemistry or a College Placement Exam?

Free chemistry courses that cover core topics like stoichiometry and chemical bonding can reinforce material tested on the AP Chemistry exam or a college placement test, though they're not designed specifically around those exam formats. Pairing a free course with official practice exams from the College Board or your target school gives a more complete picture of exam readiness.

Do These Courses Cover Organic Chemistry, or Mostly General Chemistry?

Many free introductory courses focus on general chemistry topics like atomic structure and reactions, while organic chemistry, which deals with carbon-based compounds, often gets its own separate course. Learners specifically preparing for organic chemistry, a common prerequisite for health science programs, should search for courses that name it directly.

Can These Courses Help You Pivot Into a STEM Career From a Non-Science Background?

A free chemistry course can help rebuild foundational science knowledge for someone returning to school or switching careers into a STEM field after years away from the subject. This kind of refresher often makes formal coursework, like a degree program's required chemistry classes, more approachable once you actually enroll.

Do These Courses Teach Lab Safety Practices Even Without Hands-On Labs?

Some free chemistry courses still cover lab safety concepts, like proper handling of chemicals and recognizing hazard symbols, even when the course itself doesn't include physical lab work. This background knowledge can make an eventual in-person lab course or job feel less unfamiliar once hands-on work actually begins.

Can Chemistry Knowledge From a Free Course Apply to Everyday Life?

Basic chemistry concepts, like understanding reactions and pH levels, show up in everyday activities like cooking, cleaning, and gardening, giving this knowledge practical value even outside academic or career goals. Many learners take a free chemistry course purely out of curiosity about how these everyday processes actually work.

Discover Affordable Science and STEM Programs

Free online chemistry courses are a great way to build a strong scientific foundation and explore how the world works at a molecular level. You can explore science and STEM programs on Learn.org to compare options, learn about different career paths, and connect with courses that align with your goals.