Calculate class attendance as a percentage and estimate how many additional absences remain before a chosen minimum attendance threshold is reached. Enter held sessions, sessions attended, planned future sessions, and the attendance requirement used by your course or institution.
The current rate shows your record so far, while the projected rate assumes you attend every remaining planned session. The absence allowance is a simple whole-session estimate and should be checked against official policies, which may treat late arrivals, excused absences, labs, or partial sessions differently.
1. Enter sessions held
Count all sessions included in the attendance record.
2. Enter sessions attended
Use the number credited as present.
3. Add future sessions
Enter sessions still scheduled in the period.
4. Set the minimum rate
Use the requirement stated by the course or institution.
5. Review the allowance
Treat the additional absence figure as an estimate, not an official ruling.
Attendance rate = Sessions attended ÷ Sessions held × 100
Projected attendance assumes all future sessions are attended. Additional absences allowed are estimated from the maximum total absences compatible with the selected minimum rate.
The main result is the share of held sessions you attended.
Official attendance rules may use different counting methods, so consult the syllabus before relying on the absence allowance.
Given: 24 sessions held, 22 attended, 12 future sessions, 75% minimum.
Calculation: 22 ÷ 24 × 100 = 91.7%. If all remaining sessions are attended, 34 ÷ 36 × 100 = 94.4%.
Result: Current attendance is 91.7%.
Policies differ. Enter attendance exactly as the course records it.
No. The calculator blocks that input because it is not a valid attendance record.
This calculator uses whole sessions. Convert partial attendance to an equivalent session value only if your policy permits it.
It rounds down to whole sessions so the projected rate does not fall below the threshold.
Yes. The projected rate assumes every future session is attended.