Free tool

Semester attendance planner

Multiply teaching weeks by classes per week, then subtract holidays or cancellations to estimate the semester total. The planner shows the minimum classes to attend and the maximum you can miss.

Plan the whole semester

Subtract holidays and cancelled classes from the scheduled teaching weeks.

Turn the calculation into a planMark each class, simulate what happens next, then keep your timetable and tasks together. Free, offline-first, no Classly account.

Worked semester attendance example

A subject taught 3 times a week for 15 teaching weeks has 45 scheduled classes. If 3 are lost to holidays or cancellations, the estimated total is 42 classes.

At a 75% target, you may miss at most floor(42 × 25%) = 10 classes and must attend at least 32. Ten classes equal about 3.33 teaching weeks at three classes per week, but spreading absences across a semester can be risky if replacement classes are added.

Build a more reliable plan

  1. Use teaching weeks, not the full calendar span between term dates.
  2. Enter the weekly frequency for one subject; plan subjects separately when their timetables differ.
  3. Subtract only confirmed holidays and cancellations.
  4. Use your institution's current target and verify the final total in its attendance system.
  5. Keep a buffer instead of planning to use every allowed absence.

The planner estimates the full semester before all classes happen. For your live position after classes have started, use the current attendance calculator.

Common questions

How many classes are in a semester?

Multiply the number of teaching weeks by the weekly classes for that subject, then subtract known holidays and cancellations.

Should I count exam or reading weeks?

Count them only when your subject has attendance-bearing classes in those weeks. Check the current academic calendar and timetable.

Is this an official attendance total?

No. It is a planning estimate. Your institution's timetable and attendance record remain authoritative.

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