Bunk Calculator: How Many Classes Can I Bunk? (75%)

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Formula at a glance

Bunk Calculator: Attendance — Attended ÷ held × 100. Example: 45 of 60 classes, 75% needed → Your attendance: 75% — How the Bunk Calculator works: Attendance — Attended ÷ held × 100

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📘 About the Bunk Calculator

Most Indian colleges and universities — AICTE, UGC colleges, AKTU, VTU, Anna University and many schools — need 75% attendance to sit the end-semester exam. Falling short can mean a detention or a condonation fee.

Enter the classes held and attended. The calculator shows your attendance, how many classes you can bunk and stay at the target, or how many you must attend in a row to reach it. Add the classes left in the term to see the best you can still reach, and add each subject to check them one by one.

🧮 Formula

Attendance

Attended ÷ held × 100

Classes you can bunk

⌊(100 × attended − target × held) ÷ target⌋

Classes you must attend

⌈(target × held − 100 × attended) ÷ (100 − target)⌉

✏️ Worked examples

45 of 60 classes, 75% needed

You enter
Classes held so far	60
Classes attended	45
Required attendance	75%
Classes left this term (optional)	40
Classes a week (optional)	20

You get
Your attendance	75%
You can bunk	0 classes and stay at 75% or above 😎
If you attend every remaining class	85% at the end of term
Bunks allowed for the rest of the term	10 of the 40 classes left

Attendance 75%.

40 of 60 classes

You enter
Classes held so far	60
Classes attended	40
Required attendance	75%
Classes left this term (optional)	40
Classes a week (optional)	20

You get
Your attendance	66.67%
You must attend	20 classes in a row to reach 75%
If you attend every remaining class	80% at the end of term
Bunks allowed for the rest of the term	5 of the 40 classes left
Time to recover	about 1 weeks of full attendance

66.67%; 20 classes in a row to reach 75%.

🧭 How to use this calculator

What you enter

Classes held so far
Classes attended
Required attendance (%)
Classes left this term (optional)
Classes a week (optional)
Subject 1 (optional)
Subject 1: classes held
Subject 1: attended
Subject 2 (optional)
Subject 2: classes held
Subject 2: attended
Subject 3 (optional)
Subject 3: classes held
Subject 3: attended
Subject 4 (optional)
Subject 4: classes held
Subject 4: attended
Subject 5 (optional)
Subject 5: classes held
Subject 5: attended
Subject 6 (optional)
Subject 6: classes held
Subject 6: attended

What you get

Your attendance
You can bunk
If you attend every remaining class
Bunks allowed for the rest of the term

💡 Smart attendance tips

Check the attendance portal every week.
Save bunks for emergencies and exam prep, not the first weeks.
Lab and practical classes often count separately.
Keep medical certificates for any illness.

❓ Frequently asked questions

How many classes can I bunk with 75% attendance?

For every 4 classes you attend you can miss 1. With 60 attended out of 70 held you can miss 10 more and still be at 75% (60 ÷ 80).

How many classes do I need to attend to reach 75%?

Each class you attend raises your percentage a little. From 40 out of 60 (66.7%) you need 20 classes in a row to reach 75% (60 ÷ 80).

What happens if my attendance is below 75%?

Rules vary: you may need a medical certificate, pay a condonation fee (often allowed down to 65%), or be barred from the exam. Check your college rules.

Is attendance counted subject-wise?

At many universities, yes — you need 75% in each subject, not just overall. Enter subjects separately to check.

😎 Bunk Calculator: How Many Classes Can I Bunk?