How to use the Attendance Calculator
- Enter the number of classes you attended.
- Enter the total classes held so far and the required percentage.
- Press Check attendance.
Attendance Calculator formula
Attendance % = Attended ÷ Total × 100
Classes needed = ⌈(Target × Total − 100 × Attended) ÷ (100 − Target)⌉
Classes you can skip = ⌊(100 × Attended − Target × Total) ÷ Target⌋
Worked example
Attended 42 of 60 classes = 70%. To reach 75%: (75 × 60 − 100 × 42) ÷ 25 = 12 → attend the next 12 classes (54/72 = 75%).
Frequently asked questions
How is attendance percentage calculated?
Divide the classes you attended by the total classes held and multiply by 100.
How many classes do I need to reach 75%?
Use the formula (75 × total − 100 × attended) ÷ 25 and round up, or enter your numbers above.
How many classes can I bunk?
If you are above 75%, you can skip ⌊(100 × attended − 75 × total) ÷ 75⌋ classes and stay at 75%.
Why is 75% attendance required?
Most Indian universities and boards require 75% attendance to be eligible for exams.
Does this work for 80% or 85% rules?
Yes. Change the required attendance field to your college's rule.