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Attendance Calculator: How Many Classes Can I Miss?

For college students watching the 75 percent rule. Enter classes attended and held to see your safe bunks or the classes you need.

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How to use

How to use the Attendance Calculator

  1. Enter the classes you attended and the classes held so far.
  2. Set the required percent, 75 in most colleges.
  3. Add the classes left this semester if you know them.
  4. Read how many you can miss or must attend.
Worked example

An example, step by step

You enter

42 of 54 classes attended, 75 percent required, 30 classes left

The tool shows

77.8 percent now: you can miss 2 classes and stay at 75 percent; the best possible by the end is 85.7 percent

FAQ

Questions about the Attendance Calculator

How many classes can I miss at 75 percent attendance?

Divide the classes attended by 0.75 and subtract the classes held so far; round down. The calculator does this for you.

How many classes must I attend to reach 75 percent?

Attend (0.75 x held - attended) / 0.25 classes in a row, rounded up.

Does medical leave count?

Rules differ by college; many allow condonation with proof. Check your college rules.

Is the Attendance Calculator free and private?

Yes. It is free, needs no sign-up and runs entirely in your browser, so what you type is not uploaded. You only sign in if you want to email a result to yourself or save it to your CareerByteCode profile.