Skip to the calculator

HomeStudents

Attendance calculator

Classes you must attend, or can still miss, to meet an attendance rule.

Runs in your browserNo sign-upNo ads

Quick answer

Enter classes attended, total classes held and the required percentage. At 60 of 90 classes (66.7%) with 75% required, you must attend the next 30 classes in a row.

Classes to attend in a row to reach the requirement

30

Your attendance
66.67%

You are below 75%. Attend the next 30 classes without a miss and you will meet it.

How it works

If you are below the rule, every class you attend raises both the top and the bottom of the fraction. The calculator finds how many in a row you need.

If you are above it, it shows how many classes you can skip before you drop to the limit.

Counts must be whole classes; some colleges count lab hours differently, so use their definition.

The formula

  • Attendance % = attended รท total ร— 100
  • Classes needed: x such that (attended + x) รท (total + x) โ‰ฅ required, so x = (required ร— total โˆ’ attended) รท (1 โˆ’ required)
  • Classes you can miss: m such that attended รท (total + m) โ‰ฅ required, so m = attended รท required โˆ’ total

A worked example

60 of 90 classes is 66.67%. For 75%: x = (0.75 ร— 90 โˆ’ 60) รท 0.25 = 30. After 30 more classes you have 90 of 120, which is exactly 75%.

Common questions

How is attendance percentage calculated?

Classes attended divided by classes held, times 100.

What attendance do colleges require?

Many Indian universities ask for 75%, but rules differ. Check your institution.

Do medical leaves count?

Some colleges allow condonation for medical leave. Ask your office; this tool uses plain counts.

Does it assume I never miss again?

For the classes you need, yes. For classes you can miss, it assumes you attend all the others.