Enter the classes held and attended so far to see your attendance percentage, how many classes you can still miss and how many you must attend in a row to reach your college’s required percentage.
Every result comes from three numbers: classes held (H), classes attended (A) and the required percentage (T). Remaining classes (R) are only used for the term-end figures.
Floor rounds down and ceil rounds up, because you cannot attend or miss part of a class. Some colleges count lab sessions, tutorials or medical leave differently, or calculate attendance per subject rather than overall. If yours does, enter the numbers for the subject or the way your college counts them.
A student has had 80 classes and attended 56. Current attendance is 56 ÷ 80 = 70%. With a 75% target:
A second student with 54 of 60 classes (90%) can miss 54 × 100 ÷ 75 − 60 = 12 classes and still be exactly at 75% (54 of 72). These figures are illustrative; your own numbers and your college’s rule decide.
Your college’s attendance rule decides; check the handbook. The required percentage, what counts as a class, whether condonation or medical leave is allowed, and whether the rule is applied per subject or overall are set by the institution or university in its ordinances and academic regulations. 75% is the default in this calculator only because students search for it most; it is not a legal threshold this page vouches for. If your handbook says 80%, 85% or 90%, enter that figure. When in doubt, ask the department or the examination office.
“What is the attendance rule for my course, and does medical leave count?” is the kind of question a student helpdesk on WhatsApp answers from a college’s own handbook and circulars, citing the document and page, at any hour. Colleges preparing those documents can start with the college chatbot knowledge base checklist and the guide to student enquiry management.
Divide the classes you attended by the classes held and multiply by 100. For example, 56 attended out of 80 held is 70%.
Classes you can miss = floor(attended × 100 ÷ 75 − held). With 54 of 60 attended, that is 72 − 60 = 12 classes. If the result is negative, you are already below 75% and cannot miss any.
Classes needed in a row = ceil((75 × held − 100 × attended) ÷ 25). With 56 of 80 attended, that is 400 ÷ 25 = 16 classes. For an 80% or 90% target, replace 75 with the target and 25 with 100 minus the target.
Not necessarily. The required percentage and any condonation or medical-leave rules are set by your college or university, so check your student handbook or ask the examination office.
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