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About this tool
Class 10 and 12 board exam countdown with a subject-wise datesheet, free study days between papers and marks-needed maths.
This countdown turns a Class 10 or Class 12 board datesheet into the numbers that matter: days to each paper and the free study days sitting between papers, counting out the exam days themselves. It is built for CBSE and state-board students planning a paper-by-paper revision schedule, and it also inverts the percentage formula to show the theory marks a target percentage demands once internal or practical marks are locked in, against the 33% pass requirement.
Open Board Exam Countdown on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
Shows free study days before every paper, because the datesheet — not the total countdown — decides your revision order.
Computes the theory marks needed for any overall percentage after internals, and flags targets that full theory marks cannot reach.
Papers, dates and the theory-internal split are all editable, so state-board schemes fit as well as CBSE's 80+20 and 70+30.
Free days before a paper are the days between the previous paper and this one, minus one — the day of the previous paper is spent writing it and the exam day itself is not a study day. For the first paper still ahead, every day from today up to the paper counts. A five-day gap between two papers therefore gives four free study days.
33% is the passing requirement in CBSE board exams. In subjects with a practical or internal component, a candidate must score 33% in the theory paper and the practical separately as well as in the aggregate. This tool shows the theory marks that 33% works out to for each subject's split.
A standard CBSE theory paper runs 3 hours (180 minutes), preceded by 15 minutes of reading time during which candidates may read the question paper but not write in the answer book. Some shorter papers run 2 hours — the datesheet and question paper state the duration for each subject.
Multiply the target percentage by the subject's total marks, then subtract the internal or practical marks already secured. In an 80+20 subject with 18/20 internals, 90% overall means 90 marks, so 90 − 18 = 72 of 80 in theory. If the answer exceeds the theory maximum, the target is arithmetically out of reach in that subject — this tool flags that instead of showing an impossible number.