Skip to content

Attendance Calculator

Calculate your current attendance percentage and how many classes you need — or can miss — to hit your target.

%

About the Attendance Calculator

Calculate your current attendance percentage, and find out how many more classes you need to attend — or how many you can still miss — to hit a target attendance percentage.

How to use the Attendance Calculator

  1. Enter the total number of classes held and the number you've attended.
  2. Enter your target attendance percentage.
  3. Press Calculate to see your current attendance and how many classes you need or can miss.

Tips for the Attendance Calculator

  • If you're already at or above your target, the calculator shows how many additional classes you can safely miss without falling below it.

Formula used by the Attendance Calculator

Current Attendance % = Attended ÷ Total × 100 Classes needed to reach target: x = ⌈(Target × Total − 100 × Attended) ÷ (100 − Target)⌉ Classes that can still be missed: y = ⌊Attended × 100 ÷ Target − Total⌋

Example: Attendance Calculator

42 of 50 classes attended, targeting 85% attendance

  • Classes held / attended: 50 / 42
  • Target attendance: 85%

Result: Current attendance 84% — attend 4 more consecutive classes to reach 85%

Current = 42 ÷ 50 × 100 = 84%. Since that's below target, x = ⌈(85×50 − 100×42) ÷ (100−85)⌉ = ⌈530 ÷ 15⌉ = 4 more classes needed.

Related calculators