What is the KL attendance calculator?
"KL" here refers to KL University (Koneru Lakshmaiah Education Foundation), where students regularly check attendance before exams. This calculator turns two numbers, classes held and classes attended, into your attendance percentage, then tells you how many classes you can still miss or how many you must attend to reach your required percentage.
How attendance percentage is calculated
Classes you can still miss (when you are at or above the requirement) is the largest whole number n where attended ÷ (held + n) is still at least the required percentage.
Classes you must attend in a row (when you are below the requirement) is the smallest whole number x where (attended + x) ÷ (held + x) reaches the required percentage. Both values assume you attend every class counted in x and miss every class counted in n.
Worked example
Held 120, attended 98, required 85%. Attendance is 98 ÷ 120 = 81.67%. To reach 85% you must attend x classes in a row: (98 + x) ÷ (120 + x) ≥ 0.85, so x = 27.
Simple vs LTPS mode
Use Simple when one attendance figure covers the subject. Use LTPS when your portal lists Lecture, Tutorial, Practical and Skilling separately. In LTPS mode each component gets its own percentage. With weights entered, the final figure is the weighted average: Σ(weight × component %) ÷ Σweight. With weights left blank, all classes are pooled and counted equally. The calculator never assumes weights, because they depend on your programme.
Using the result
Treat the result as a planning aid. Condonation, medical leave and other adjustments are decided by the university, so confirm eligibility on your official attendance record.