Attendance Calculator
Find your attendance percentage, how many classes you can miss or need to attend to stay above 75% (or any minimum), track each subject, and plan the rest of the term day by day.
At a glance
- Attendance % = classes attended ÷ classes held × 100. The calculator gives the exact number of classes to attend in a row to reach your minimum, or how many you can miss and stay at it.
- At 75%, each class you miss has to be balanced by three you attend: 30 of 50 (60%) needs 30 more in a row, while 45 of 50 (90%) can miss 10.
- Works with any minimum – 75% (CBSE board exams and many colleges), 70% per subject (law, under the BCI rules), 75% theory and 80% practical (MBBS) – using exact whole-number arithmetic, so 75% of 40 is exactly 30.
- An option for colleges that round to the nearest whole percent, where 74.5% counts as 75%.
- Counts approved medical, duty or OD leave as present if your college does, and with the classes left this term says how many you must attend – or that the minimum can no longer be reached.
- Subject-wise tracker with one-tap Present and Absent buttons and Undo, the overall percentage, the subjects below the minimum and a CSV download.
- Term planner: enter classes per weekday, holidays and the last day of classes, then tick the days you plan to miss to see your percentage after every day. Everything is saved in your browser only.
Step by step
How to calculate attendance and the classes you can skip
- 1
Set your minimum
Type your college’s requirement or tap 75%, 80% and so on. Choose Rounded % if your college rounds to whole percent.
- 2
Enter your classes
On Calculator, type the classes held and attended (or missed). Add leave counted as present and the classes left this term if you know them.
- 3
Read the answer
See your percentage, how many classes you can miss or must attend in a row, and the what-if table.
- 4
Track each subject
On Subjects, enter each subject’s numbers once, then tap Present or Absent after every class.
- 5
Plan the term
On Term planner, fill in your weekly timetable, holidays and the last day of classes, and tick the days you plan to miss.
Features
Everything you need, nothing you don’t
The answer students want
“You can miss the next 4 classes” or “Attend the next 12 in a row” – with the percentage before and after, and the working.
Every subject at a glance
One row per subject with its percentage, a bar against your minimum and what it allows, plus the overall figure most colleges also check.
Tap after each class
Present and Absent buttons keep the numbers current without retyping them; Undo fixes a wrong tap.
Plan the whole term
From your timetable and holidays it lists every class day left, so you can see which days you can afford to miss – and which you cannot.
Any rule
Set 60, 75, 80, 85% or any figure, and choose exact or rounded comparison to match your college’s handbook.
Private
No sign-up and no upload: your numbers stay in this browser for the next time you check.
Attendance formulas
Attendance % = attended ÷ held × 100. To find how many classes you must attend in a row to reach a minimum p (as a fraction, 75% = 0.75), solve (attended + x) ÷ (held + x) ≥ p, which gives x ≥ (p × held − attended) ÷ (1 − p), rounded up.
To find how many you can miss and still have p, solve attended ÷ (held + y) ≥ p, which gives y ≤ attended ÷ p − held, rounded down.
| You have | Attendance | At 75% | At 80% |
|---|---|---|---|
| 30 of 50 | 60% | attend the next 30 | attend the next 50 |
| 36 of 50 | 72% | attend the next 6 | attend the next 20 |
| 40 of 50 | 80% | can miss 3 | can miss 0 |
| 45 of 50 | 90% | can miss 10 | can miss 6 |
| 54 of 60 | 90% | can miss 12 | can miss 7 |
How many classes can I miss?
The minimum decides how many classes you must attend for every one you miss. Over a whole term this is the largest share of classes you can miss:
| Minimum | Attend for every class missed | Most you can miss |
|---|---|---|
| 60% | 1.5 | 40% of classes |
| 65% | 1.86 | 35% of classes |
| 70% | 2.33 | 30% of classes |
| 75% | 3 | 25% – 1 in 4 |
| 80% | 4 | 20% – 1 in 5 |
| 85% | 5.67 | 15% of classes |
| 90% | 9 | 10% – 1 in 10 |
Attendance rules you may meet
Colleges and universities set their own rules on top of these, often per subject and overall, and some count labs as two or more periods. Check your handbook – and count periods the same way it does.
| Where | Rule |
|---|---|
| CBSE Class 10 and 12 | 75% to sit the board exams (Examination Bye-Laws); shortages of up to 25% can be condoned for medical emergencies, national or international sport and other serious reasons, with documents |
| MBBS in India (NMC) | 75% in theory and 80% in practical and clinical training |
| Law degrees in India (BCI) | 70% in each subject; a college may condone down to 65% in a subject if the overall attendance is 70% |
| Schools in the United States | missing 10% or more of school days, excused or not, is “chronic absenteeism” |
| Schools in England | missing 10% or more of sessions (half days) is “persistent absence” |
If you are short of attendance
- Act early: every week left in the term is classes that can still pull the percentage up.
- Attend everything for a while – the What if table shows how fast the figure climbs.
- Get approved medical, sports or duty leave on record now, with documents; it is much harder afterwards.
- Ask how condonation works at your college: who decides, how far below the minimum is allowed, and the deadline.
- Watch each subject, not just the overall figure – one short subject can stop you sitting its exam.
FAQ
Frequently asked questions
How do I calculate my attendance percentage?
How many classes can I miss and still have 75%?
How many classes do I need to attend to reach 75%?
Does medical leave count as attendance?
Is the 75% rule per subject or overall?
What if I can’t reach 75% this term?
Are my numbers saved?
Keep going
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