Attendance Calculator: How Many Classes Can You Miss?

Attend the next 12 classes in a row to reach 75%.

70%

Current attendance

Minimum required

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42 ÷ 60 × 100 = 70%

Working while you study? Online and distance degrees have different attendance rules. Ask a counsellor which suit you.

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The short answer

Divide the classes you attended by the classes held and multiply by 100 to get your attendance. To stay at 75%, you can miss classes only while attended ÷ held stays at or above 0.75. Enter your numbers and the calculator tells you exactly how many you can miss, or must attend.

How to use it

  1. 1

    Enter how many classes have been held so far.

  2. 2

    Enter how many of those you attended.

  3. 3

    Set your college’s minimum, usually 75%, and read the result.

How the attendance maths works

Attendance % = classes attended ÷ classes held × 100

  • Above your target: you can miss x more classes while attended ÷ (held + x) stays at or above the target.
  • Below your target: you need x classes in a row so that (attended + x) ÷ (held + x) reaches it.
  • Your university’s ordinance sets the actual minimum and any condonation for illness or approved leave. Check it before you plan around a number.

Questions students ask

How do I calculate attendance percentage?

Attendance % = (classes attended ÷ classes held) × 100. If you attended 45 of 60 classes, your attendance is 75%.

How many classes do I need to attend to reach 75%?

Keep attending until (attended + x) ÷ (held + x) reaches 0.75. From 40 of 60 (66.7%), you need 20 classes in a row to reach 75%. The calculator works this out for any numbers.

Why is 75% attendance required?

Many universities and regulators set 75% as the minimum to sit end-semester exams. The exact rule, and any condonation for medical reasons, comes from your own university’s ordinance.

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