Study Hours Calculator

Working out exam study hours from the material itself is more reliable than picking a number of hours and hoping it fits. Count the topics or chapters you have to cover, judge how hard the material is, and multiply. The calculator then divides that across the days you have left and tells you whether the plan fits inside the hours you can actually give it.

The formula: Total study hours = Topics × Hours per topic Plus review: add 20%, because a first pass is not retention Daily hours needed = Total ÷ Days until the exam

Hours per topic by difficulty:

• Easy (review, or material you already half know): 1.5 hours per topic
• Moderate (some genuinely new concepts): 3 hours per topic
• Hard (mostly new, or conceptually dense): 5 hours per topic

Those are the figures the calculator uses. They are deliberately generous, because the single most reliable finding about study planning is that people underestimate. If your own past experience says otherwise, trust that over the default.

Worked example: Eight chapters of moderate-difficulty material, exam in 14 days, four hours a day available.

• Study hours: 8 × 3 = 24 hours
• Review at 20%: 4.8 hours
• Total: 28.8 hours
• Daily: 28.8 ÷ 14 = 2.1 hours a day, comfortably inside a four-hour ceiling

Push the same eight chapters into three days and it becomes 9.6 hours a day, which is where the plan stops being a plan.

Why 20% for review

Reading a chapter once and moving on feels like progress and produces very little retention. The 20% is the minimum needed to come back to earlier material before it fades. If the exam is more than a fortnight out, budget closer to 30%, because the first chapters will have decayed substantially by the time you reach the last.

Looking at a whole semester instead of one exam?

That is a different question and it works from credit hours rather than chapters: the standard guideline is roughly two to three hours of outside study per credit hour per week, which puts a 15-credit load at 30 to 45 hours a week on top of class time. The Semester Course Load Planner does that calculation, including the difficulty weighting and whether the result fits in a week alongside a job.