How many hours should you revise for A-levels?
Dr Lavan Ganeshkumar, PhD · updated 4 October 2026
There is no single right number, but a useful rule of thumb is that focused, active revision of two to four hours on a school day is plenty, and more is only helpful if the quality holds up. Six hours of re-reading is worth less than ninety minutes of testing yourself.
Consistency matters more than volume: an hour every day beats a long Sunday.
A realistic amount
- Year 12 term time: a few hours per subject per week outside lessons, including homework, with regular short revisiting.
- Year 13 term time: more, as the content builds and mocks approach, but still spread across days.
- Exam period: four to six hours of real work a day is sustainable for most people; more usually means diminishing returns.
Quality over hours
Count hours of active work only: questions, recalling from memory, marking your answers. A timer on a page you are only reading does not count. Short focused blocks with breaks usually beat a single marathon.
Is three hours a day enough?
For most students on school days, yes, if those hours are active and spread across your subjects. If you are behind in content or aiming for top grades you may want more in the exam period, but extra hours should not replace sleep.
What about eight hours a day?
It is possible for short stretches but rarely productive for long. If you are doing it, check that you are testing yourself, not rereading, and that you are sleeping and eating properly.
Where Trayna fits, and where it does not
Trayna is a 24/7 online tutor in your pocket, on your tablet and on the web. Dr Lavan teaches you the topics in the app any time, anywhere, and an adaptive plan reinforces them each day from now to your exam. It is there for students who cannot afford 1-to-1 tutoring, and it is built to act like a 1-to-1 tutor: it teaches, it checks, and it adapts to how you are doing. The aim is that you really understand the subject and are prepared for it, not just that you have revised it. It is A-level only, for Maths, Chemistry, Physics and Biology. Maths follows Edexcel; Chemistry, Physics and Biology follow AQA.
A plan sets the daily amount at what you could still do on a bad day, which is more reliable than an ambitious number you drop.
It is for both Year 12 and Year 13. Year 13 students already use it, and Year 13 topics are being added as current students need them while Year 12 is the most complete, so check your topics in the app. If you only want free past papers, PMT does that better than we do, and we would rather you used it.
Common questions
How many hours a day should I revise for A-levels?
On school days two to four focused hours is plenty for most students, rising to four to six in the exam period. Active hours count; time spent rereading does not.
How many hours a week per subject at A-level?
A few hours outside lessons in Year 12, more in Year 13, depending on the subject and how secure you are. Spread them across the week.
Is 3 hours of revision a day enough?
Usually yes on school days if the time is active and covers all your subjects. You may need more near exams, but not at the cost of sleep.
Can I revise for 8 hours a day?
You can for short periods, but returns fall after a few hours. Make sure it is active work and that you sleep and rest.
Is it better to revise during the day or evening?
Whenever you can concentrate. Many students do their hardest work earlier in the day and recall practice later. Keep it consistent.
Trayna does this automatically. You enter your subjects, your exam dates and how long you have each day, and it builds the route from today to those exams, then adapts it as you go. Maths follows Edexcel; Chemistry, Physics and Biology follow AQA.
Get Trayna on the App Store · on Google Play
Free for 14 days, then from £9.99 a month. Cancel any time.