TOOL 03 / ATTENDANCE
Target Attendance Calculator
Find the minimum consecutive future classes you must attend to reach your chosen percentage.
Free · No sign-up · Browser-only
Work toward your target.
Use class counts, not names. Required fields are labelled; optional fields may be left blank.
Downloads are generated on this device. Printing opens your browser’s print dialog.
Behind the result - No mystery in the method
Let A be attended classes, T classes held and p the target divided by 100. We solve (A + x) ÷ (T + x) ≥ p. If the target is not yet met and p < 1, x = ceiling((p × T − A) ÷ (1 − p)). The result is checked using unrounded arithmetic and counts whole classes. If you have already missed a class, 100% cannot be reached with any finite number of new classes. All x future classes must be attended; the tool does not know how many are actually scheduled.
It does not fetch school records, verify official attendance, or store student data. All tool inputs are processed in this browser tab only. Blank optional fields are omitted. Any text you enter is displayed literally, not interpreted as HTML. Do not enter names, student IDs, contact details or other personal information.
Before you go
Why can 100% be impossible?
If you already missed a held class, adding attended classes makes the fraction approach 100% without ever reaching it exactly. The tool reports that finite impossibility rather than rounding it away.
Does the plan include future absences?
No. Every calculated future class must be attended. Recalculate after any missed class or change to your starting counts.
What if the term ends before that many classes?
The tool cannot know your schedule. Compare the result with the remaining classes confirmed by your school; a mathematical target may not be feasible this term.
Does the site store student names or data?
These tools do not store or transmit entered data. They run in memory in this tab. The web host may still log ordinary page requests; see the Privacy Policy. Saved files, printer queues and shared devices are outside the tool’s control.