Attendance Calculator
Calculate your current class attendance percentage and find out how many more classes you can miss — or must attend in a row — to hit your target attendance requirement.
Inputs
Result
Fill in the fields to see your result.
Formula
Current attendance is the share of held classes you attended, expressed as a percentage.
currentPercent = (classesAttended / totalClasses) × 100When you're above target, the maximum number of additional classes you can miss and stay at the target is found by solving for how many more total classes could be held before your percentage drops to the target.
maxMissable = floor(classesAttended × 100 / target − totalClasses)When you're below target, the number of classes you must attend in a row is found by solving for the smallest count that brings your percentage back up to the target.
needed = ceil((target × totalClasses − 100 × classesAttended) / (100 − target))Step-by-step
- 1
Enter classes attended
Count how many class sessions you've actually attended so far.
- 2
Enter total classes held
Enter the total number of sessions held to date, not the total for the whole term.
- 3
Set your target attendance
Enter the minimum percentage your school or employer requires — defaults to 75%.
- 4
Read your result
See your current percentage and exactly how many classes you can miss or must attend to meet your target.
Examples
Above target with room to spare
- classes Attended
- 27
- total Classes
- 30
- target Percent
- 75
90.00% attendance — you can miss 6 more classes and stay at 75%.
Below target, catching up
- classes Attended
- 20
- total Classes
- 30
- target Percent
- 75
66.67% attendance — attend the next 10 classes in a row to reach 75%.