Source: JNTUH R22 B.Tech Academic Regulations (official PDF) . Clauses 6.1, 6.2 and 6.4 of the R22 B.Tech Academic Regulations. JNTUH requires 75% in aggregate; between 65% and 75% a shortage may be condoned on genuine grounds, and below 65% the regulation says it shall in no case be condoned. Checked 22 August 2026.
Condonation is permission, not a right — where a university offers it at all, it is granted on stated grounds, usually with a fee and an application through your college. Treat the middle band as “ask immediately”, not as “you are fine”.
How attendance is calculated
Your attendance percentage is simply the classes you attended divided by the classes that were held:
Attendance % = (classes attended ÷ classes held) × 100
So if 60 classes were held and you attended 40, that’s 40 ÷ 60 × 100 = 66.67%.
The calculator above also answers the two questions that actually matter mid-semester, which the plain percentage doesn’t tell you.
“How many more classes can I miss?”
If you’re currently above the requirement, there’s a fixed number of classes you can still skip before you drop below it. The calculator works this out exactly rather than leaving you to guess.
Worked example: you’ve attended 48 of 60 classes, which is 80%. At a 75% requirement you can miss 4 more — that puts you at 48 out of 64, which is exactly 75%. Miss a fifth and you’re at 73.85% and short.
“How many classes must I attend to get back?”
If you’re already below, the calculator tells you how many consecutive classes you need to attend without missing any.
Worked example: 40 attended out of 60 held is 66.67%. To reach 75% you must attend the next 20 classes straight — that gets you to 60 out of 80, exactly 75%. Attend only 19 and you land on 74.68%, still short.
This is the number most students underestimate. Recovering attendance is much slower than losing it, because every class you attend also increases the total held.
The JNTUH rule, and condonation
If you are on a JNTUH-affiliated course, the R22 regulations set three bands rather than one line, and the calculator above tells you which one you are in:
- 75% and above — eligible to sit the semester end examinations. Clause 6.1.
- 65% to just under 75% — the shortage may be condoned on genuine grounds. Clause 6.2 allows condonation of up to 10%.
- Below 65% — clause 6.4 states the shortage “shall in NO case be condoned”. There is no application that fixes this one.
The middle band is the one people misread. Condonation is permission you apply for, not a status you automatically hold — it is granted on genuine grounds, usually with a fee, through your college. If you are sitting at 68% in October, the useful move is to start the application and start attending, not to relax because you are “in the condonation range”.
Source: JNTUH R22 B.Tech Academic Regulations, clauses 6.1, 6.2 and 6.4.
Outside JNTUH, 75% is the common minimum at Indian engineering colleges — but your own institution sets the rule that counts. Some departments require 80%, and some count practicals separately from theory. Check your regulations rather than assuming.
Common questions
Does this store my data? No. The calculation runs entirely in your browser. Nothing you type is sent anywhere or saved.
Should I count practicals and theory together? Only if your college does. Many count them separately, in which case run the calculator once for each.
What about medical leave? That depends entirely on your institution’s condonation policy, which this calculator can’t know. Treat the result as your raw attendance and check the rules for exemptions.
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