The Bachelor of Science (BSc) is one of Australia's most versatile and respected undergraduate degrees, typically completed over three years of full-time study. It provides students with a rigorous, research-led foundation in the natural and physical sciences, equipping them with deep disciplinary knowledge alongside highly transferable analytical, problem-solving, and data interpretation skills. Students generally choose one or two majors from a broad suite of disciplines including biology, chemistry, physics, mathematics, environmental science, genetics, microbiology, neuroscience, ecology, earth sciences, psychology, and data science. The degree is structured to combine core scientific theory with hands-on laboratory, field, and computational work, preparing graduates to think critically, conduct experiments, interpret data, and communicate findings to technical and non-technical audiences alike.

The Bachelor of Science is designed for intellectually curious students who want to explore how the world works — from the molecular level to entire ecosystems. It suits those with a strong interest in STEM subjects who may be drawn to careers in research, healthcare, environmental protection, biotechnology, education, government, or industry. Many universities in Australia offer significant flexibility, allowing students to pair a science major with business, law, education, or technology, or to pursue a double major within science itself. Graduates may also use the degree as a pathway to postgraduate study in medicine, engineering, law, research, or specialised science fields.

Employers of Bachelor of Science graduates span a wide range of sectors in Australia: government departments (including the CSIRO, Department of Health, Department of Environment, and various state agencies), private sector corporations (mining companies, pharmaceutical firms, agribusinesses, and environmental consultancies), hospitals and pathology laboratories, food and beverage manufacturers, technology companies, universities, and research institutes. The degree is also a recognised stepping stone towards further postgraduate qualifications in fields such as medicine, dentistry, pharmacy, and engineering, dramatically expanding the career horizons available to graduates.

For domestic students, entry to a Bachelor of Science in Australia is primarily based on the Australian Tertiary Admission Rank (ATAR), which varies considerably between institutions. Highly competitive universities typically require ATARs in the range of 80–95, while regional and newer universities may accept students with ATARs from around 50–65, or have no minimum ATAR threshold at all. Most programs require completion of senior secondary education (Year 12 or equivalent) with prerequisites in English and often one or more of Mathematics, Chemistry, Biology, or Physics — the specific prerequisites depend on the chosen major. Students who do not meet ATAR thresholds may be able to gain entry through alternative pathways such as TAFE diplomas, foundation programs, enabling courses, or recognition of prior learning.

For international students, English language proficiency is mandatory. The most commonly accepted test is IELTS Academic, with a typical minimum overall score of 6.5 and a minimum of 6.0 in all bands, though requirements vary by institution. Alternative tests such as TOEFL iBT (minimum overall score of around 87), PTE Academic (typically 64), and Cambridge English may also be accepted. International applicants must also meet academic entry requirements equivalent to Australian Year 12, assessed on a country-by-country basis by the relevant Tertiary Admissions Centre or the university directly.

For mature-age applicants or those who completed secondary education more than two years ago, many universities assess eligibility based on previous TAFE, diploma, or undergraduate study relevant to science. Work experience in a scientific field is generally not counted as a formal entry criterion for undergraduate programs, though it may strengthen a personal statement or be considered under special entry schemes. Equity access schemes and bonus point adjustments — such as those for rural and regional students, first-in-family applicants, and Indigenous Australians — are widely available and can meaningfully lower the effective ATAR needed to gain entry.