Attendance Calculator

Divide the classes you attended by the total number held, then multiply by 100. If 52 classes have been held and you attended 38, that is 38 divided by 52, which comes to 0.7308, or 73.08 percent.

That part is simple arithmetic, and it is not really why anyone opens a page like this. The question people actually have is the next one: so how many can I still miss? Or, when the number has already slipped, how many do I have to attend from here? Both of those need a different calculation, and both are what this tool gives you alongside the percentage.

One detail worth being careful about. Use whatever unit your register uses, and use it on both sides. Hours attended against hours held is fine. Classes attended against classes held is fine. Hours attended against classes held produces a number that looks perfectly reasonable and is wrong.

There is a trap in the way this percentage moves, and it catches almost everyone. Every class you attend from now on is added to the classes you attended and to the total held. The denominator keeps growing, so each class you turn up to lifts your percentage by less than the last one did.

Say you are at 60 percent after 20 classes, needing 75. Attending the next 10 in a row without missing one does not get you there. You would be at 22 attended out of 30, which is 73.33 percent. It takes a longer unbroken run than the gap suggests, and the further you fall the steeper the climb becomes.

This is the single strongest reason to check the number in week five rather than week fifteen. Missing three classes early costs a handful of attendances to repair. Missing fifteen can be arithmetically impossible to repair before the term ends, and no amount of effort in the final fortnight changes that. The tool will tell you honestly when you have crossed that line.

Plenty of students work out a single overall figure, see a comfortable 82 percent, and relax. Then they are barred from one exam. The reason is that many institutions apply the minimum to every individual subject, not to your average across all of them.

Under that rule, four subjects at 90 percent and one at 55 percent is not an average of 83 percent. It is one subject you cannot sit. The average is a comforting number with no authority behind it.

So check which rule your college uses before trusting any single figure, including one from this page. If it is per subject, run each subject through the tool on its own. It takes a minute per subject and it is the only version of the calculation that reflects what you are actually judged on. If you also want your marks worked out, the marks and percentage calculator handles each subject separately for the same reason.

If you add the number of classes still to come, you get a plan rather than a snapshot. Four things become clear at once.

The best percentage you can finish on, if you attend every remaining class. The worst, if you miss all of them. The minimum you must attend to land on your target. And whether that target is reachable at all, which is the one people most need to know and least want to ask.

That last figure is the useful one for planning around anything you cannot move, such as a wedding, a medical appointment or travel. Knowing you can miss four more classes but not five turns a vague worry into a decision you can actually make.

Then the tool says so, in words, instead of printing a number that cannot happen. This matters more than it sounds, because a calculator that quietly returns an impossible figure is worse than one that returns nothing.

Two situations produce it. A 100 percent target is unreachable from the moment you miss a single class, because nothing you do later removes that miss from the total. And any target becomes unreachable once there are not enough classes left in the term to lift the percentage far enough, however perfect your attendance from here.

If you are in that position, the number is still worth having. Knowing the best you can finish on is what you need for the conversation with your department, and departments generally respond better to an exact figure and a documented reason than to a rounded guess.

Yes, and the reason is structural rather than a promise. The calculation is done by a small piece of JavaScript that arrives with this page and runs inside your browser. Your numbers are never sent anywhere, because there is nowhere for them to be sent. There is no account, no saved history, and nothing left behind once you close the tab.

You can prove it for yourself. Load this page, disconnect from the internet, and the calculator keeps working exactly as before. That only holds if the maths is genuinely running on your own device.

The rest of the tools here work the same local way. If you are putting together an assignment or a leave application, text to PDF and JPG to PDF run entirely in the browser too, and you can browse everything in one place under all calculators.