How to Calculate Attendance Percentage (and What You Can Still Miss)
Attendance percentage is classes attended divided by classes held, multiplied by 100. The more useful question is usually the second one: given the classes left this term, how many can you still miss and stay above the required threshold?
The two calculations
- Current attendance: attended ÷ held × 100.
- Classes you must still attend: required% × (held + remaining) − attended.
- Classes you can still miss: attended + remaining − required% × (held + remaining).
- If the first result exceeds the classes remaining, the threshold is out of reach for this term.
Why the denominator keeps moving
Attendance is judged at the end of term against total classes held, not against today's count. Every additional session scheduled raises the number of attendances you need, which is why a comfortable 80% in week four can slide below the line by week twelve without a single extra absence being planned.
Rules that change the maths
- Condoned or medical leave may be excluded from the denominator or credited as attended.
- Some institutions calculate per subject, others across the whole programme.
- Lab and tutorial sessions sometimes carry separate minimums.
- Shortage of attendance can block exam eligibility, not just reduce a grade.
Key takeaways — Attendance Percentage Calculator
- Attendance % = attended ÷ held × 100.
- Plan against end-of-term totals, not today's count.
- Check whether approved absences leave the denominator or enter as attended.