Calculators
Attendance Calculator
Enter classes attended and held to see your attendance, how many classes you need for your target and how many you can safely miss.
Enter classes attended and classes held to see your attendance.
Per-subject attendance and timetable
Many colleges apply the minimum to every subject separately, so check each one. Add how many classes each subject has per week and the weeks left in term to plan ahead.
Enter attended and held counts for at least one subject.
Processed on your device — nothing is sent anywhere. Check your institution’s own rules for the minimum, condonation and how labs or tutorials are counted.
Works in your browser. No account needed.
Frequently asked questions
How is attendance percentage calculated?
Divide the classes you attended by the classes held and multiply by 100. If you attended 42 of 60 classes, your attendance is 42 ÷ 60 × 100 = 70%. Check with your department whether labs, tutorials and cancelled classes count toward the number held.
How many classes do I need to attend to reach 75%?
Attending x more classes gives (attended + x) ÷ (held + x). Setting that equal to 75% gives x = (75 × held − 100 × attended) ÷ 25, rounded up. From 42 of 60, you need (4500 − 4200) ÷ 25 = 12 classes in a row, reaching 54 of 72, which is exactly 75%. For other targets, replace 75 and 25 with the target and 100 minus the target.
How many classes can I miss and stay above 75%?
Missing y classes gives attended ÷ (held + y). The largest y that keeps you at 75% or more is 100 × attended ÷ 75 − held, rounded down. With 54 of 60, that is 5400 ÷ 75 − 60 = 12 classes, which leaves you at 54 of 72, exactly 75%. Missing one more would drop you below it.
Is 75% the minimum everywhere?
No. The minimum, whether it applies per subject or overall, and how shortages can be condoned all depend on your board, university or college. VTU’s 2022 B.E./B.Tech regulations, for example, require 85% in each course and let the Vice-Chancellor condone a shortage of up to 10%. Set the target to whatever your own rules say.
How does the timetable planner work?
It multiplies each subject’s classes per week by the weeks left to estimate how many classes remain. To finish at your target you must attend at least target × final classes ÷ 100 − classes attended so far, rounded up; the rest of the remaining classes can be skipped. If that number is more than the classes left, the target cannot be reached this term. Holidays and cancelled classes change the count, so update it as you go.
Is my attendance data saved or uploaded?
No. The calculator runs in your browser and nothing you type is sent to a server or stored. Reloading the page clears the fields.
About this tool
This attendance calculator answers the three questions students ask most: what is my attendance right now, how many classes do I have to attend to get back to the minimum, and how many can I miss without falling below it. Enter the classes you attended, the classes held and your target, and each answer appears with the formula and your own numbers, so you can check it by hand.
The maths is exact. Current attendance is attended ÷ held × 100. Classes needed is the smallest whole number x for which (attended + x) ÷ (held + x) reaches the target, which works out to (target × held − 100 × attended) ÷ (100 − target), rounded up. Classes you can miss is the largest whole number y for which attended ÷ (held + y) stays at or above the target, 100 × attended ÷ target − held rounded down. Because classes come in whole numbers, both answers are rounded the safe way and checked against the target again.
Rules differ between institutions, and many apply the minimum to each subject separately. The table lets you track every subject side by side, flags which ones need classes and how many, and shows your overall figure as total attended ÷ total held. Add each subject’s classes per week and the weeks left in term, and the planner shows how many of the remaining classes you must attend and how many you can skip while still finishing at the target.
The target is yours to set. 75% is filled in because it is a common rule, but some institutions use a higher figure: VTU’s 2022 regulations require 85% per course, with up to 10% condonable by the Vice-Chancellor. Treat the results as planning figures and confirm the exact rule, including condonation and how practicals are counted, with your college. Nothing you enter leaves your device.