Attendance so far, classes needed to reach 75% and how many you can still miss
Runs in your browser. Nothing you type is sent anywhere. Updated on 24 Oct 2026.Attendance percentage is classes attended divided by classes held, times 100. At 45 out of 64 it is 70.3%, and 12 classes in a row bring it back to 75%, since 57 out of 76 is exactly 75%. At 60 out of 70, ten classes can be missed before falling below 75%.
Under Count, pick All classes for one total or Per subject to list each subject with Add a subject.
Enter Classes attended and Classes held, or Attended and Held for every subject.
Type the Classes left this term and the Minimum attendance your college requires.
Read your attendance, how many classes to attend in a row to reach the minimum, and how many you can miss; Share result copies a link.
The Attendance Percentage Calculator works out your attendance from the classes you attended and the classes held, then answers the two questions that follow: how many classes you must attend in a row to reach the minimum, and how many you can miss and still stay at or above it.
The minimum is a box, set to 75% as an example because that is the figure students most often meet. Your college, university or board sets its own in its regulations or student handbook, sometimes with medical or duty leave counted separately, so enter the figure that applies to you.
The formulas. Attendance is attended divided by held, times 100. To reach a minimum of T percent from a attended out of h held, attending x classes in a row gives (a + x) / (h + x), and the smallest whole x that reaches T is (T × h − 100 × a) / (100 − T), rounded up. At 45 out of 64 and 75%, that is (4,800 − 4,500) / 25 = 12. The classes you can miss is 100 × a / T − h, rounded down: at 60 out of 70, 80 − 70 = 10.
The rest of the term. If you know how many classes are left, enter them. The page works out how many of those you must attend to finish at or above the minimum, how many you can skip, and the best percentage you could still reach, which tells you early if a shortfall can no longer be made up.
Per subject. Many colleges apply the minimum to each subject as well as the total. Switch to subjects, enter each one, and the page shows each subject's percentage, the classes it needs or can spare, and the combined figure.
The page counts classes, not hours or lab sessions of different lengths, and it does not know your college's rules on condonation or leave. Check the attendance figure your college publishes, which is the one that counts. Nothing you type leaves your browser.
Divide the classes you attended by the classes held and multiply by 100. Attending 45 of 64 classes gives 45 divided by 64, times 100, which is 70.3%. Add every subject's attended and held classes first if your college reports one combined figure, or check each subject separately.
Work out 75 times the classes held, minus 100 times the classes attended, divided by 25, and round up. At 45 of 64 that is (4,800 minus 4,500) divided by 25, or 12 classes in a row. After them attendance is 57 of 76, exactly 75%.
Divide 100 times the classes attended by 75, subtract the classes held, and round down. At 60 of 70 that is 80 minus 70, so 10 classes. Missing an eleventh leaves 60 of 81, which is 74.1%, below the line.
No single figure applies to every institution. Colleges, universities and boards set their own minimum in their regulations, and 75% is the figure students meet most often, which is why it is the example here. Some allow medical or duty leave to be condoned. Enter your own college's figure in the minimum box.
Both, if your college applies the minimum to each subject. A comfortable overall figure can hide one subject below the line. Switch to subjects, enter each one, and the page lists every subject's percentage with the classes it needs or can spare, plus the combined figure.
Enter the classes left this term. The page shows the fewest of them you must attend, how many you can skip, and the best percentage possible if you attend every one. When even that best figure is below the minimum, speak to your department about condonation early.
Formula only: no rates or limits are read from an official source.
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