Bunk calculator
You can bunk classes until attended ÷ held drops to your minimum. For a 75% rule, that is one class for every three you have attended. Enter your numbers to see your exact limit and what bunking the next few classes does to your percentage.
What if I miss more classes?
See your percentage after missing the next few classes.
How many can I bunk in total?
Count every class held so far, including the ones you missed.
How bunking changes your attendance
A bunked class still counts as held, so your percentage falls every time. The limit for a target is:
bunks left = ⌊ attended × 100 ÷ target − held ⌋
With 34 of 40 classes attended (85%) and a 75% rule: 34 × 100 ÷ 75 − 40 = 5.33, so you can bunk 5 classes. After those you would be at 34 ÷ 45 = 75.55%. A sixth bunk would take you to 34 ÷ 46 = 73.91%.
The one-in-four rule of thumb
For a 75% minimum, at least three of every four classes must be attended. So the most you can ever have missed is a third of the classes you attended: 30 attended allows 10 missed, 45 attended allows 15. The table on the 75% attendance calculator lists it for common class counts.
Before you bunk
- Calculate per subject. A safe overall percentage can hide one subject below the line.
- Keep one or two classes in reserve for days you are ill. Medical leave is not always approved.
- Check whether your college rounds 74.5% up. Many do not.
Common questions
How many classes can I bunk with 75% attendance?
At most one class for every three you attend. Exactly: bunks allowed = attended × 100 ÷ 75 − held, rounded down. With 34 of 40 attended, that is 5 more classes.
Is it better to bunk early or late in the semester?
Late, if at all. Early in the term each class is a big share of the total, so a single absence moves your percentage a lot, and you do not yet know how many classes will be cancelled or how strict the subject is.
Do labs and tutorials count separately?
At many colleges, yes: a lab or tutorial is often its own subject with its own attendance. Check how your timetable lists it and calculate each one separately.
Does a bunk on a day with two classes count twice?
If the subject meets twice that day, both classes are held and both are missed, so it counts as two. Enter classes, not days.