How to Calculate Attendance Percentage in College (Formula & Examples)
If you've ever done the math on a scrap of paper before a class you're thinking of skipping, you already know the stakes — most Indian colleges won't let you sit the exam if your attendance drops too low. Here's the exact formula, with worked examples, so you're not guessing.
The formula
That's it — two numbers. "Classes Held" means classes that have actually happened so far this semester, not the total scheduled for the whole term. Your percentage moves every single time a class happens, whether you're there or not.
Worked examples
Example 1 — early semester. 8 classes have been held, you attended 6. That's (6 ÷ 8) × 100 = 75% — right on the line. One more miss without an attend to balance it, and you're below.
Example 2 — mid-semester, been slacking. 40 classes held, you attended 27. That's (27 ÷ 40) × 100 = 67.5% — below the usual 75% minimum, and you'd need several attends in a row to climb back (see our bunk-margin guide for exactly how many).
Example 3 — comfortably ahead. 50 classes held, you attended 46. That's (46 ÷ 50) × 100 = 92% — well clear, with real room to skip a few before it matters.
Don't want to redo this math every week? Bunku tracks it automatically, per subject.
Get Bunku free →Two mistakes that throw the number off
1. Counting scheduled classes instead of held classes
Your total isn't "how many classes are on the timetable this semester" — it's how many have actually happened so far. A cancelled class, a holiday, or a professor being out doesn't count toward the total at all.
2. Averaging theory and practical together
Most engineering and science programs track theory and lab/practical attendance separately, each needing to independently clear the minimum. Averaging them into one number can make a real shortfall in one look fine on paper — and your college's actual records won't average them for you.
Try it yourself
Rather than doing the arithmetic by hand, plug your own numbers into the free attendance calculator — it also tells you how many classes you can still skip, or how many you need to attend to recover, for whatever minimum your college requires.