Education calculator
Attendance Calculator
Track attendance and compare it with a required percentage.
Attendance rate
90%
How the attendance calculator works
Calculate attendance percentage and the number of additional absences available before a target is missed.
Attending 18 of 20 sessions produces 90% attendance.
Assumptions and limitations
Every session is weighted equally and excused absences are included unless removed from the totals.
Inputs and results stay in your browser. Blank, invalid, or mathematically undefined inputs show a clean placeholder instead of a broken number.
Practical use
Use this education calculator to explore scenarios quickly, then verify important decisions against the original source data or requirements.
Frequently asked questions
Does the attendance calculator send my data anywhere?
No. It runs client-side in your browser and makes no network requests.
Why is the result blank or shown as a dash?
One or more inputs are blank, outside the accepted range, or would make the calculation undefined. Check the labels and enter finite values.
Can I use decimal values?
Yes, where decimals are meaningful. Counts that represent whole items may require integers.