What is an Attendance Calculator?
An Attendance Calculator works out your current attendance percentage and how many classes you need to attend, or can miss, to stay at a required level.
Many colleges require 75% attendance to sit exams. Knowing exactly how many classes you can miss helps you plan around illness or travel.
How to use the Attendance Calculator
- Enter classes attended.
- Enter total classes held.
- Enter required attendance.
- Tap Calculate to see the result.
- Tap Reset to clear the fields and try again.
Who should use it
- College and school students
- Students close to the minimum attendance
- Teachers doing quick checks
Key terms
- Classes attended
- The number of classes you were present for.
- Required attendance
- The minimum percentage your college sets.
Frequently asked questions
What is the usual attendance rule?
Many colleges require at least 75%.
Does it count future classes?
It assumes every future class counts the same as past ones.
Can I use it for labs separately?
Yes. Enter lab figures on their own.
Is my data stored?
No.
Is my data stored?
No. Everything you enter stays in your browser and is cleared when you close the page.
Last updated: 1 November 2026