Fill in your details and click Calculate to see your attendance rate, absent days, and whether you meet the required minimum.
Attendance percentage is one of the simplest calculations to understand. You divide the number of days you were present by the total number of days the class or workplace was open, then multiply by 100.
Formula: Attendance % = (Days Present ÷ Total Days) × 100
For example, if you attended 152 days out of 180 total school days, your attendance rate is (152 ÷ 180) × 100 = 84.4%.
The result tells you what portion of available time you were actually present — a key metric for academic eligibility and workplace performance.
Most schools and colleges enforce a minimum attendance rule — usually 75%. If your rate drops below this level, you may be declared "detained" and barred from sitting exams, regardless of your grades.
Knowing where you stand — and how many days you can still miss — helps you plan ahead and avoid surprises.
Once you know the total number of days in your term, you can work out the maximum number of absences allowed before breaching the minimum requirement.
Formula: Max absent = Total days × (1 − Required rate)
| Total Days | 75% Min | 80% Min | 85% Min |
|---|---|---|---|
| 100 days | 25 absent | 20 absent | 15 absent |
| 150 days | 37 absent | 30 absent | 22 absent |
| 200 days | 50 absent | 40 absent | 30 absent |
| 240 days | 60 absent | 48 absent | 36 absent |
If your attendance has already slipped below the required level, you need to attend a certain number of consecutive days to bring your rate back up. The calculator shows this number automatically.
Recovery formula: Days needed = (Required % × (Current total + X) − Current present) ÷ Required %
Solving for X (future consecutive days needed) gives:
X = (Required % × Total − Present days) ÷ (1 − Required %)
Note: The further behind you are, the more consecutive days you need — the recovery curve gets steep fast. Staying above the threshold at all times is always easier than trying to recover later.
Quick lookup: find your attendance percentage for common total-day counts.
| Present Days | Out of 100 days total |
Out of 150 | Out of 180 | Out of 200 | Out of 240 | Out of 365 |
|---|
Green = at or above 75%. Yellow = 70–74.9%. Red = below 70%. Formula: (Present ÷ Total) × 100.
How many days you can miss at each required attendance level before breaching the threshold.
| Total Days | 75% Min max absent |
80% Min | 85% Min | 90% Min | 95% Min | Min Days Present (75%) |
|---|
Formula: Max absent = Total × (1 − Required %). Fractional results are floored down to be safe.
If your current rate is below 75%, this table shows how many days you must attend in a row to hit the threshold.
| Current Rate | Total 100 days | Total 150 days | Total 180 days | Total 200 days | Total 240 days |
|---|
Formula: Recovery days = (0.75 × (Total + X) − Present) = 0. Solving: X = (0.75 × Total − Present) ÷ 0.25. "N/A" means already at or above 75%.
A reference guide to typical minimum attendance rules around the world.
| Country / Region | Min Attendance | Applies To | Consequence of Breach | Medical Exemption | Standard |
|---|---|---|---|---|---|
| 🇮🇳 India | 75% | Universities, colleges | Barred from exams | Up to 25% extra | UGC guidelines |
| 🇺🇸 USA | 90–95% | K-12 public schools | Truancy proceedings | Doctor's note | State law varies |
| 🇬🇧 UK | 90% | Schools (under 16) | Parent fined | Allowed | DfE guidelines |
| 🇦🇺 Australia | 90% | Schools | Welfare check / fine | Allowed | State regulation |
| 🇩🇪 Germany | Compulsory | All schools | Legal penalty | Required | Schulpflicht |
| 🇯🇵 Japan | ~80% | Universities | Course failure | Varies | University policy |
| 🇨🇳 China | 80–85% | Universities | Exam ban | Allowed | MOE regulation |
| 🇧🇷 Brazil | 75% | Universities (LDB) | Fail the course | Some courses | LDB Art. 47 |
| 🇿🇦 South Africa | 80% | Schools | Academic retention | Allowed | SASA policy |
| 🇸🇬 Singapore | 90% | Primary / secondary | Report to MOE | Medical cert required | MOE guidelines |
| 🏢 Typical Employer | 96–98% | Full-time employees | Warning / dismissal | Sick leave policy | Company HR policy |
| 🏛️ Professional Courses | 85–100% | Medical, law, etc. | Removed from course | Case by case | Accreditation body |
Rules vary by institution, course type, and jurisdiction. Always verify with your specific school or employer. This table is for reference only.
How many days absent per month maps to annual attendance percentage, assuming a standard working month.
| Days Absent/Month | Monthly Rate | Annual Rate (×12) | Annual Days Absent | vs. 75% Min | vs. 90% Min |
|---|
Assumes 22 working days per month × 12 months = 264 total working days per year.
How employee absenteeism rate affects annual working days and typical employer response.
| Attendance Rate | Days/Year (260 total) | Days Absent | Absenteeism Rate | Employer Classification | Typical Response |
|---|
Assumes 260 working days per year (52 weeks × 5 days). Employer thresholds vary by company and country. This is a general benchmark — always check your own HR policy.