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Attendance Percentage Calculator

Enter the number of classes held and the number you attended to get your attendance percentage. Add your school’s minimum and it tells you how many more classes you can miss — or how many you must attend in a row to get back above the line.

Quick examples
%
Your numbers stay in your browser. They are never uploaded.
Attendance85%
Classes missed
6
More classes you can miss
5
Classes to attend in a row to recover
0

Saved setups

Save a set of inputs you reuse — your usual rate, your loan, your room sizes — and load it back in one tap.

    Your recent calculations

    Results you calculate here are kept on this device so you can come back to them.

      Formula

      Attendance % = classes attended ÷ classes held × 100
      Classes you can still miss = ⌊attended ÷ required rate − held⌋
      Classes needed to recover = ⌈(required rate × held − attended) ÷ (1 − required rate)⌉

      How to use it

      1. Enter the classes or days held so far.
      2. Enter how many you attended.
      3. Enter the required attendance percentage.
      4. Read your rate and your margin on either side of the requirement.

      Worked examples

      Attended 34 of 40 classes with a 75% requirement

      Attendance
      85%
      Classes missed
      6
      More classes you can miss
      5
      Classes to attend in a row to recover
      0

      Attended 35 of 50 classes with a 75% requirement

      Attendance
      70%
      Classes missed
      15
      More classes you can miss
      0
      Classes to attend in a row to recover
      10

      Why recovering takes so long

      Every class you attend adds to both the attended and the held totals, so the percentage climbs slowly. At 35 of 50 (70%), reaching 75% takes 10 straight classes — 45 of 60 — even though you are only 2.5 classes short today.

      Common thresholds

      Many colleges, particularly in India, require 75% attendance to sit exams. In US schools, a student is generally counted as chronically absent after missing 10% or more of school days — about 18 days of a 180-day year — whether the absences are excused or not.

      Questions people ask

      How do I calculate attendance percentage?

      Divide classes attended by classes held and multiply by 100. 34 out of 40 is 85%.

      How many classes can I miss and keep 75% attendance?

      With 34 of 40 attended, you can miss 5 more: 34 of 45 is 75.6%, while 34 of 46 would be 73.9%.

      What is 90% attendance over a school year?

      On a 180-day year, 90% means attending 162 days, or missing 18.

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