There is no fixed number of hours that guarantees success because study quality usually matters more than only long hours. However, many science students study around 4–8 focused hours daily outside school or college, depending on their goals, exams, and difficulty level. Competitive exam aspirants may sometimes study longer with proper breaks and planning.
Subjects like Physics, Chemistry, Biology, and Mathematics often require both theory understanding and regular problem practice. Consistency, revision, sleep, and concentration are very important. Studying continuously without rest may reduce productivity and memory retention. Honestly, a well-planned 5–6 hours of focused study with discipline and regular revision is often more effective than studying 12–14 distracted hours daily.
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