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About this tool
Check your current attendance percent and how many classes you must attend or can skip.
Attendance Percentage Calculator works out what percentage of classes you have actually attended, then answers the question that matters: how many classes in a row you must attend to climb back to the required percentage, or how many you can miss while staying above it. Add the number of classes left in the term and it also projects your best and worst possible end-of-semester attendance. Built for school and college students facing a 75% or 80% minimum attendance rule.
Open Attendance Percentage Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Shows classes needed when you are short and classes you can skip when you are safe.
Enter classes remaining to see your best case, worst case and how many you may still miss.
If attending every remaining class still falls short of the target, the tool says so instead of showing a fake number.
Attendance percentage = (classes attended / classes held) x 100. Only classes actually conducted count in the denominator, so a cancelled lecture affects neither side.
Solve (attended + n) / (held + n) = 0.75 for n, which gives n = (0.75 x held - attended) / 0.25. The tool rounds this up to a whole class, because you cannot attend a fraction of one.
Each new class adds one to both the numerator and the denominator, so recovery gets harder the more classes have already been held. Missing early in a term is far easier to fix than missing late.
That depends entirely on your institution's rules — some grant condonation or count duty leave as present, others do not. This is an informational estimate; confirm the treatment of your leave with your department before relying on it.
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