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Class Attendance Calculator

Calculate your attendance percentage and determine how many classes you can miss while meeting your syllabus requirement.

Class attendance tracking
Current Attendance Rate
80.0%
● Good Standing (Minimum: 75%)

Attendance formulas

Track session attendance and calculate maximum allowable absences:

Attendance (%) = (Classes Attended ÷ Total Classes Held) × 100
Max Allowable Absences = Total Classes × (1 − Required % ÷ 100)

Attendance examples

Mid-semester 75% requirement check

Out of 30 lectures held so far, a student attended 24.

(24 ÷ 30) × 100 = 80.0% (Good Standing)

Maximum absences in a 45-class course

Course syllabus strictly mandates an 80% minimum attendance threshold.

45 × (1 − 0.80) = 9 classes maximum can be missed

Frequently asked questions

How do you calculate class attendance percentage?

Divide the number of classes attended by the total number of classes held, then multiply by 100: Attendance (%) = (Classes Attended ÷ Total Classes Held) × 100. For example, 24 attended out of 30 held is (24 ÷ 30) × 100 = 80.0%.

How do you calculate how many classes you can miss?

If the minimum attendance required is M% over N total semester classes, the maximum classes you can miss is: Max Missed = Floor(N × (1 − M ÷ 100)). For a 40-class semester requiring 75%, Max Missed = Floor(40 × 0.25) = 10 classes.

What happens if a class is cancelled by the professor?

Cancelled classes are not counted toward the total classes held. Adjust the total classes held input downward by the number of cancelled sessions.

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