Attendance Calculator

Attendance %, classes you can skip, or classes needed to reach 75%.

Runs in your browser — nothing is uploaded

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How to use Attendance Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

Attendance = attended ÷ held × 100

Classes needed = ⌈(r·held − attended) / (1 − r)⌉