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Attendance Calculator (75 % Rule)

Most universities, VTU included, require 75 % attendance to sit the exam. This works out where you stand and, more usefully, exactly how many consecutive classes it takes to climb back over the line.

Attendance — can I still make 75 %?

Works out where you stand and what it takes to get back — how many classes you must attend without missing one, or how many you can still afford to skip.

65 %

Below the 75 % line — attend the next 16 classes without missing one to get back.

Current attendance
Classes to attend in a row
Classes you can still miss
  1. 1.Given: 26 attended out of 40 held, target = 75 %
  2. 2.FormulaAttendance % = attended ÷ held × 100Substitute= 26 ÷ 40 × 100Result= 65 %
  3. 3.FormulaClasses to attend in a row: (attended + n) ÷ (held + n) ≥ targetSubstituten ≥ (75 × 40 − 100 × 26) ÷ (100 − 75)Resultn = 16
Common trap: Attendance is usually counted per subject, not as one college-wide figure — you can be at 80 % overall and still be detained in the one subject you skipped. Check each subject separately, and remember most colleges round down.

The formula

Attendance % = (attended / total) × 100 ; classes needed n: (attended + n) / (total + n) ≥ 0.75

attended
classes you have attended
total
classes held so far
n
consecutive future classes needed to reach the threshold

Worked example

30 classes attended out of 45 held.

  1. Current: 30 / 45 = 66.7 %
  2. Need (30 + n) / (45 + n) ≥ 0.75
  3. 30 + n ≥ 33.75 + 0.75n → 0.25n ≥ 3.75

n = 15 — fifteen consecutive classes without a single miss to reach 75 %.

Where you'll use it

The calculation every student does too late. Note how the arithmetic punishes early absence: recovering from 66 % takes fifteen perfect classes, while staying above the line costs nothing.

Related calculators

VTU SGPA and CGPA CalculatorSGPA = Σ(Cᵢ × Gᵢ) / ΣCᵢ