Education
Attendance Calculator
Check your current attendance percentage, how many more days you need to attend, and how many you can safely skip — all instantly.
Enter your attendance details and click Calculate
Current attendance
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Days can miss
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Days need to attend
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0%75%100%
How is this calculated?
Current % = (Attended / Total) × 100
Days needed to reach target:
x = ⌈(Target% × Total − Attended) / (1 − Target%)⌉
Days you can safely miss:
y = ⌊(Attended / Target%) − Total⌋The "days needed" formula accounts for the fact that total days also increases as you attend more. The "days can miss" assumes all future days are absences.
Calculation history
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FAQ
Frequently asked questions
How do I calculate my current attendance percentage?
Divide the number of classes you have attended by the total number of classes held, then multiply by 100.
What if I need 75% attendance?
Enter your current attendance and your target (75%). The calculator will tell you exactly how many consecutive classes you must attend to reach it.
Can I calculate how many classes I can skip?
Yes. If you are above your target percentage, the calculator will show how many future classes you can miss while staying above the threshold.
Is this calculator for college or school?
It works universally for any school, college, university, or corporate training program that tracks attendance percentages.
Does missing one class drop my percentage significantly?
It depends on the total number of classes. Missing a class early in the semester has a larger mathematical impact than missing one later on.