“How many hours should you study a week?” has a useful first answer and a better second one. The first is a budget: about two hours of study outside class for each credit hour. The second is the week you can actually keep, split by subject, written down after you do the work.
Start with two hours per credit
College advising offices commonly tell full-time students to plan two to three hours of study per week for every hour they spend in class. A 3-credit course is therefore about 6 to 9 hours outside class. A 12-credit load is about 24 to 36 hours. A 15-credit load is about 30 to 45. Class time sits on top of that. A 15-credit term plus the study budget is close to a full-time job, which is why a 20-hour campus job and a 15-credit load collide.
Treat the range as a planning number, the way a department uses it when it warns you about course load. It is a starting budget for the term. It is a poor scoreboard. A student who already knows the material in one course can sit under two hours per credit there and still be fine. A student meeting a proof-based course for the first time often needs three or four hours per credit on that course alone.
- 12 credits, mixed difficulty: budget about 24–30 study hours.
- 15 credits, one hard sequence: budget about 30–40, and give the hard course the extra hours first.
- One 3-credit course beside a full-time job: 6–9 hours can be the whole study week. That is a serious week, not a small one.
High school and online courses use different clocks
A high-school day already contains most of the class time. Applying a 30-hour college budget on top of a 7-hour school day produces a fantasy schedule. For secondary school, a practical week is often 7 to 14 hours of real homework and revision outside school, more in exam season, less in a light week. The point is the same as in college: name the hours, then see whether they happened.
Fully online courses sometimes quote about three hours per credit per week because the “class” is inside that number. Read the syllabus. If it already includes lectures, do not add another two hours per credit on top unless the work is actually that heavy.
Change the multiplier by difficulty
A single weekly total hides the course that can fail you. Split the budget before you split the week. A familiar writing course might need one hour of study per class hour. A first chemistry sequence might need three or four. Write the hours per subject, then add them. If the sum is larger than the free hours in your week, drop a credit, drop a shift, or accept that one course will run light — and choose which one, on purpose.
Example for a 12-credit term: biology, high difficulty, 3 class hours × 3 = 9 study hours. Calculus, high, 3 × 3 = 9. A medium writing course, 3 × 2 = 6. A low-difficulty elective, 3 × 1 = 3. Total study budget: 27 hours, plus 12 in class. If you work 15 hours, that week is already about 54 hours of obligations before meals and commuting. The elective is the first place to cut study time, not the calculus.
Fit the number to the week you have
There are 168 hours in a week. Sleep at 8 hours a night is 56 of them. A target you miss every Sunday teaches you to ignore the tracker. Set the weekly study hours a little above what you actually did last week, not at the number that would look impressive in a group chat. After two honest weeks you will know whether 18 hours is your real ceiling. Raise one subject by an hour. Leave the rest.
Spread the hours across the days you can protect. Twenty hours over five days is four hours a day. Twenty hours imagined as “I’ll do it Saturday” is how the log stays empty until Sunday night. If you want the blocks on a grid before the week starts, the time blocking guide is the planning half. The log is the other half.
Count focused work, then check the subjects
A study hour is a sitting where you produced something: problems finished, a section annotated, a past paper attempted, a lecture paused and rewritten. Commuting, an open PDF during dinner, and a group chat do not belong in the total. A week of 25 hours on the easy elective and 2 hours on the course you are failing is a bad week that looks productive if you only read the grand total.
That is why the number has to live on a study progress tracker with a goal per subject, not as one sticky note that says “study more.” The study hours log is how those hours get recorded without a spreadsheet you abandon. Block length is a separate choice: 25 minutes is enough for drills, 45 or 60 for a chapter. The Pomodoro write-up covers that choice.
How to put the budget in StudyTracker
StudyTracker will not calculate credits for you, predict a grade, or tell you that 27 hours is “enough.” You type the weekly hour goal. It compares that goal with minutes the timer actually ran.
- Study Plan. One subject per course, eight at most. Type the weekly hours you chose — anywhere from 0 to 168. The bar reads logged time over that target for the current week, Sunday through Saturday, then starts over. Extra hours still count in the total after the bar is full.
- Timer. On the study timer, pick the subject and a length (25, 30, 45, 60, or 1–180 minutes). Minutes are written while the focus countdown runs. The 5-minute break state is not written to the subject.
- Seven-day graph and calendar. The bars show whether the hours landed across the week. The calendar is a log of days you already studied. It does not schedule next Tuesday.
No account is required; the log stays in the browser. Google sign-in only syncs your own devices. There is no CSV export. On a computer, the same site is the study tracker for PC — nothing to install.
Questions that usually follow the rule
How many hours a day should I study?
Divide the weekly budget by the days you will actually sit down. Four hours across five days is a 20-hour week. Eight hours every day is a 56-hour week, which almost nobody keeps beside class. Daily targets that ignore sleep fail first.
Is two hours a day enough?
Two hours a day is about 14 hours a week. That can cover one hard course beside a job. It is a light budget for a full-time 15-credit term. Check the per-subject split before you decide the total is fine.
Should the week before an exam be longer?
Move hours toward the exam subject. Do not inflate every course. The revision hours guide is the way to do that without turning the month into a streak contest.
Pick the weekly number from the credit rule, cut it until it fits, then let the study tracker show whether each subject received its share.