Attendance Percentage Calculator
Check your attendance in seconds and find exactly how many classes you must attend — or can safely miss — to stay above the 75% rule.
Your attendance
Use the numbers from your school diary or ERP app.
Plan ahead
How your percentage changes over the next few classes.
| Next classes | If you attend all | If you miss all |
|---|
Step-by-step working
Subject-wise attendance
Add each subject — your list is saved on this device.
| Subject | Held | Attended | Attendance | Status | |
|---|---|---|---|---|---|
| Total | 0 | 0 | — |
Never fall short of 75% again
Three numbers are all you need. The calculator does the maths and tells you exactly what to do next.
Enter classes held
The total number of periods or working days counted so far.
Enter classes attended
How many of those you were present for.
Pick the requirement
75% is the CBSE board-exam rule; many colleges use 75% or 80%.
Follow the plan
See classes needed to recover, or how many you can safely miss.
Attendance formula
Attendance % = (Attended ÷ Held) × 100
Example: 84 classes attended out of 120 → 84 ÷ 120 × 100 = 70%.
Classes needed to reach the target
x = (p × H − A) ÷ (1 − p)
Here p is the target as a decimal (0.75), H is classes held and A is classes attended. Round x up to the next whole class.
Classes you can miss
y = A ÷ p − H
Round y down. If y is 0 or less, you cannot miss any class without dropping below the target.