Calculator
Attendance calculator
The calculator shows the share of presences in all classes held and solves for the future consecutive presences required to reach a selected target.
Reviewed: 3 August 2026Processed locally
Calculator
Enter data
The classes held, absences and the attendance percentage you want to reach. Fields marked with an asterisk are required.
How to use the calculator
- Enter the number of classes held and your absences.
- Set the target percentage and calculate the result.
Calculation details
Formula and calculation method
Attendance = (classes held − absences) ÷ classes held × 100%.
Worked example
With 100 classes and 12 absences, there are 88 presences and attendance is 88%.
Limitations
- A school register may treat lateness, excused absences or optional classes differently.
Sources
Engine version: 1.0 · Last reviewed: 3 August 2026
Frequently asked questions
Does an excused absence reduce attendance?
That depends on the school’s rules and how the absence is recorded.
Is the result rounded?
The displayed rate uses two decimals, while the target is solved with unrounded values.