Attendance Calculator — How Many Classes Can You Skip?

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Know exactly where you stand — your attendance percentage, how many classes you can still skip, or how many you must attend in a row to be safe.

Classes held so far

Classes you attended

Required attendance (%)

Most universities and schools in Bangladesh require 75% attendance to sit for exams — some require 80% or 60%. Enter your institution's rule.

How to use this tool

1. Enter how many classes have been held so far this semester (check your register or portal).
2. Enter how many you actually attended.
3. Set your institution's required percentage — 75 is the common rule in Bangladesh.
4. Press Calculate to see your percentage, your safe margin, and exactly what to do next.

Example

40 classes held, you attended 32, required 75%: 32 ÷ 40 = 80% attendance — you are safe, with room to skip 2 more classes (32 ÷ 42 = 76.2% still ≥ 75%). Skip a third and you land at 74.4% — short.

The formula

attendance % = attended ÷ held × 100   |   max skips = ⌊ attended × 100 ÷ required − held ⌋

What the result means

The SAFE badge means you are at or above the line; the number beside it is your margin — how many absences you can still absorb. SHORT means you are below the line, and the tool tells you the unbroken attendance streak needed to climb back. The mathematics assumes every future class happens and you attend all of them.

Frequently asked questions

Does the 75% rule apply everywhere?

It is the most common requirement in Bangladeshi schools and universities, but it varies — some institutions use 60%, 80% or count per-course. Always confirm your own institution's rule and enter it in the required field.

What if medical leave or holidays change the class count?

Adjust the numbers: add held classes only for those that actually took place, and check your institution's medical-leave policy — many excuse absences with proper documents.

Why does it say I must attend every class from now on?

Because that is the fastest mathematical recovery. Each additional held class dilutes your absence record; the streak number is the shortest path back to the required line.

Is my attendance data stored?

No. The calculation happens entirely in your browser and nothing is saved or sent anywhere.

Can I use this as a teacher?

Yes — the math works for any register: enter the class totals and a student's count to see who is near the line.

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Explore the island world

• Scholar Bay — the university island where this tool lives.
• The Main Island — drive the boat, explore the whole world.
• The 90s Kids Island — where most of us started school.

Privacy & data: this tool runs entirely in your browser — nothing you type is uploaded, saved or sent anywhere. · Disclaimer: results are for guidance only; always confirm important academic decisions with your university or official documents. · Privacy Policy · Disclaimer