Most study timetables fail for one quiet reason: they divide the week evenly, as if every subject deserved the same hours. They do not. A six-credit subject you find hard needs more of your week than a four-credit subject you could pass in your sleep. This study hours planner does the division properly: you enter the weekly hours you can genuinely give, then each subject’s credits and how difficult it feels on a 1–5 scale, and it allocates your hours in proportion to credits × difficulty — the result is an editable table of hours, minutes and percentage share per subject.
How the split works
Each subject gets a weight = credits × difficulty. Credits stand for how much the subject counts and how much syllabus it carries; difficulty stands for how expensive each hour of progress is for you personally. Your weekly hours are then divided in the same proportions as the weights. A subject with twice the weight of another gets twice the time. Nothing fancier is going on — and that is the point: the method is transparent enough to argue with, and the table stays editable so you can override it when a deadline moves.
The worked example in the tool
The planner opens with 20 hours and three subjects. Mathematics: 6 credits, difficulty 4 → weight 24. History: 4 credits, difficulty 2 → weight 8. English: 4 credits, difficulty 3 → weight 12. The weights total 44, so Mathematics takes 20 × 24/44 = 10.91 hours (655 minutes, 54.5% of the week), English takes 20 × 12/44 = 5.45 hours (327 minutes) and History takes 20 × 8/44 = 3.64 hours (218 minutes). Check any even-split timetable against that and you can see the usual failure: History would have been given the same 6–7 hours as Mathematics, and Mathematics would quietly drown.
Setting the difficulty honestly
Difficulty is the input students lie about. A workable scale: 1 = you could teach it, 2 = comfortable with revision only, 3 = average effort, steady progress, 4 = you fall behind without regular work, 5 = you have failed it or fear you will. Grade pain, not prestige — the planner cannot help a subject you scored 2 out of pride. Re-score every few weeks: as a hard subject improves, its hours should flow to the next problem while there is still time to fix it.
Turning hours into a week you can keep
Book the minutes, not the rounded hours — the minute column is computed before rounding, so the blocks always add up to your full week. Split each subject’s block into sessions of 25–50 minutes with real breaks; three focused sessions beat one long sit. Put the heaviest subject in your best hours of the day, not the leftovers. And protect one buffer block per week that belongs to no subject: the week something goes wrong, the buffer absorbs it instead of the plan collapsing.
What this planner does not do
It does not tell you how many total hours a syllabus needs — that depends on the volume of material and your reading pace, a different question (our Spanish companion tool works that way for exam syllabuses). It also cannot make the hours exist: if the honest total is more than your week holds, the fix is a bigger budget or a smaller subject list, not a cleverer split. Used straight, though, twenty well-aimed hours outperform thirty evenly spread ones — because the hours finally land where the weight is.
When the honest answer is “more hours”
Sometimes the planner’s real message is in the total, not the split: if a difficulty-5 subject with heavy credits lands on 12 hours a week and you know from experience it needs 15, no redistribution will save it — the week itself is too small or the subject load is too big. Read the table as a budget negotiation with yourself. Adding two hours to the week, dropping an elective, or moving one subject to a later term are all legitimate outputs of a planning tool; pretending the arithmetic away is not. The planner’s job is to make the trade-off visible while it is still cheap to change.
Related tools
Versión en español: Planificador de Horas de Estudio Semanales: Reparte tu Tiempo por Asignatura según Créditos y Dificultad · ECTS Workload Calculator.
Embed this tool on your website — free
Copy the code below to add this working tool to your own page. A small credit link stays with it — that’s all we ask.