The Attendance Percentage Calculator tells you what proportion of your classes you have attended, whether you meet your course’s minimum requirement, and how many more sessions you can afford to miss. It is built for students tracking the common 75% attendance rule and for anyone monitoring attendance against a target.
How it works
Your attendance percentage is simply:
percentage = (classes attended ÷ total classes) × 100
To work out how many absences you can still take, the tool first finds the maximum total absences allowed over the whole course while staying at or above your required percentage:
max absences = floor(total − (required ÷ 100) × total)
It then subtracts the absences you have already used (total − attended) to show how many remain.
Example
You have attended 42 of 50 classes, with a 75% requirement:
- Percentage = (42 ÷ 50) × 100 = 84% — you meet the requirement.
- Max absences allowed = floor(50 − 0.75 × 50) = floor(12.5) = 12.
- Absences used = 50 − 42 = 8, so 4 absences remain.
| Field | Value |
|---|---|
| Attendance | 84% |
| Required | 75% |
| Max absences | 12 |
| Absences left | 4 |
Everything is calculated in your browser and nothing leaves your device.