Calculate your attendance
instantly.
The most complete attendance calculator. Check percentage, plan bunks, track subjects, and predict your future attendance — all in one beautiful tool.
Attendance percentage calculator.
Enter your total classes and attended classes. See your percentage, skip allowance, and recovery plan instantly.
Quick attendance tips.
The 75% Rule
Most colleges need 75%. In a 120-class semester, you can miss max 30 classes.
Pro Tip
Track per-subject. Missing 5 in Math hurts more than 5 in an elective with fewer total classes.
Danger Zone
Below 65%? Most colleges won't let you sit for exams. Recovery gets exponentially harder.
Safe Zone
Above 85%? You're golden. You can safely miss 1 in every 7 upcoming classes.
Everything you need for attendance.
Six powerful tools — from basic calculation to multi-subject tracking and future prediction.
Why students choose AttendanceCalc.
Instant results
Get your attendance percentage the moment you type. Zero loading.
100% private
Everything runs in your browser. No data sent anywhere. No sign-up.
Works everywhere
Phone, tablet, laptop — perfectly adapts to any screen size.
How attendance is calculated.
The formula
Attendance % = (Classes Attended ÷ Total Classes) × 100
Example
(85 ÷ 100) × 100 = 85% attendance
Frequently asked questions.
How do I calculate my attendance percentage?+
Divide the number of classes you attended by the total classes held, then multiply by 100. Formula: Attendance % = (Classes Attended ÷ Total Classes) × 100. Example: (78 ÷ 100) × 100 = 78%.
How many classes can I miss and still maintain 75%?+
Use our Bunk Calculator. Formula: Max bunks = (Attended × 100 - 75 × Total) ÷ 75. If you attended 80/100 with 75% required, you can skip 6 more classes.
What if my attendance is below 75%?+
Our calculator shows how many consecutive classes to attend to recover. Formula: Classes needed = (75 × Total - 100 × Attended) ÷ 25. Most colleges bar students from exams below 75%.
Can I track attendance for multiple subjects?+
Yes — our Subject Tracker lets you add all subjects individually with per-subject percentages and overall average, saved in your browser. No sign-up needed.
Is this attendance calculator free to use?+
100% free forever. No sign-up, no ads, no hidden charges. All data stays in your browser — we never collect or store anything on any server.
Does this work for school attendance calculation?+
Yes. The formula is the same for schools, colleges, and universities: (Days Present ÷ Total School Days) × 100. Works for any attendance tracking need.
How many classes can I bunk in a semester?+
Depends on total classes and your required %. In a 120-class semester with 75% rule: 120 × 0.75 = 90 required, so max 30 absences. Our Bunk Calculator gives you the exact number based on your data.
Can employees use this attendance calculator?+
Absolutely. Replace 'classes' with 'working days' — the formula is identical: (Days Present ÷ Total Working Days) × 100. Our Working Days Calculator also computes business days between dates.
How to predict future attendance percentage?+
Use our Attendance Predictor. Enter current data + upcoming classes, and it simulates 5 scenarios: attend all, miss 25%, miss 50%, miss all, and minimum-to-pass. Each shows if you'll meet the requirement.
What is the minimum attendance required in Indian colleges?+
Most Indian colleges require 75% minimum attendance. Some engineering and medical colleges require 80-85%. Dropping below can result in exam debarment, fines, loss of marks, or semester repetition.
How to convert attendance to GPA or grade?+
Use our Grade Converter. Common mapping: 95%+ = A+ (4.0), 90% = A, 85% = A-, 80% = B+, 75% = B (3.0), 70% = B-, 65% = C+, 60% = C (2.0), below 50% = F. Scale varies by institution.
Is my attendance data saved between visits?+
Yes — the Subject Tracker saves data locally in your browser using localStorage. It persists between visits until you clear browser data. No account or cloud storage needed.
The most complete free attendance calculator for students.
AttendanceCalc is a free online attendance calculator designed specifically for college students, university students, school students, and working professionals who need to track and manage their attendance percentage. Whether you need to calculate your current attendance percentage, figure out how many classes you can safely skip, or predict your future attendance based on different scenarios — our suite of six powerful tools has you covered.
How to calculate attendance percentage
The attendance percentage formula is simple: divide the number of classes you attended by the total number of classes held, then multiply by 100. For example, if your college has conducted 120 classes in a semester and you attended 96 of them, your attendance percentage is (96 ÷ 120) × 100 = 80%. Our attendance percentage calculator does this math instantly and also tells you how many more classes you can miss before dropping below your required minimum — typically 75% in most Indian colleges and universities.
75% attendance rule explained
The 75% attendance rule is the most common minimum attendance requirement across Indian educational institutions. If your attendance drops below 75%, you risk being barred from examinations, losing internal assessment marks, paying fines, or even having to repeat the semester. In a typical semester with 120 total classes, maintaining 75% means attending at least 90 classes — giving you a buffer of only 30 absences across the entire semester. Our dedicated 75% attendance calculator shows you exactly where you stand and how many classes you can still miss safely.
Bunk calculator — plan your absences smartly
Every student wants to know: "How many classes can I bunk?" Our bunk calculator answers this precisely. Enter your current attendance data and the number of upcoming classes remaining in the semester, and the tool calculates the exact number of lectures you can safely skip while staying above your required attendance percentage. It even accounts for scenarios where you are already below the requirement and shows how many consecutive classes you must attend to recover.
Subject-wise attendance tracker
Unlike other attendance calculators that only compute a single percentage, our subject tracker lets you monitor attendance across all your subjects simultaneously. Add Mathematics, Physics, English, or any subject — log present/absent with one tap, and see per-subject percentages plus your overall average. All data is saved locally in your browser using localStorage, so your records persist between visits without any sign-up or account creation.
Attendance predictor and working days calculator
Planning ahead is crucial for maintaining good attendance. Our attendance predictor simulates multiple future scenarios: What if you attend all remaining classes? What if you miss 25%? What is the absolute minimum you must attend to pass? Each scenario is color-coded to show whether you will meet or fail the requirement. For employees and academic planners, our working days calculator computes business days between any two dates, excluding weekends and holidays — perfect for semester planning and leave management.
Why choose AttendanceCalc?
Our attendance calculator is completely free, requires no sign-up, and works on any device — phone, tablet, or laptop. All calculations happen instantly in your browser with zero data sent to any server, ensuring complete privacy. The tool supports custom attendance requirements (75%, 80%, 85%, or any custom percentage), provides visual progress rings and color-coded status indicators, and includes step-by-step formula breakdowns so you understand the math behind every result. Whether you are a college student worried about the 75% rule, a school student tracking daily attendance, or an employee monitoring working days — AttendanceCalc is the only attendance tool you will ever need.
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