Attendance Calculator
Enter classes held and classes attended to get your current attendance percentage. Set a target (like 75%) and it tells you exactly how many more classes you need to attend to reach it - or how many you can safely miss.
How to use
- Enter the total number of classes held so far and how many you attended.
- Set your target attendance percentage (75% is common, but check your institution's rules).
- Click Calculate to see where you stand and how many more you need to attend.
Related tools:
Most colleges require 75% attendance to sit for exams. Falling below that means a fine, a detention, or being barred from the exam entirely. The calculator tells you two things: your current attendance percentage, and how many more classes you need to attend (without skipping any) to reach your target percentage.
It also works the other direction - if you have a buffer above the required threshold, it shows how many classes you can skip while staying above the cutoff. Finals week planning gets a lot easier when you know exactly how much slack you have left.
Frequently Asked Questions
How is attendance percentage calculated?
Attendance % = (classes attended / total classes held) x 100. If 100 classes have been held and you attended 72, your percentage is 72%.
How many classes do I need to reach 75%?
If you have attended A classes out of T total held, and need to reach P% with future classes: you need to attend enough consecutive classes so that (A + x) / (T + x) >= P/100. Solve for x: x >= (P*T - 100*A) / (100 - P). Enter your numbers and the calculator solves it.
What if I have already fallen below 75%?
With very low attendance, it may be mathematically impossible to recover to 75% in the remaining classes. The calculator will show you exactly how many consecutive classes you would need - which might be more than the total left in the semester.