75% attendance: how many days do you have to attend?
Updated: 2026-11-04
The quick answer: total days × 0.75, rounded up
To find the days you must attend for 75% attendance, multiply the total number of days by 0.75 and round up. Rounding down is the common mistake: 75% of 22 days is 16.5, and attending 16 days gives 72.7%, which is below the line. You need 17.
days to attend = ⌈ total days × 75 ÷ 100 ⌉ · days you can miss = total − days to attend
Days to attend in a month
| School or class days in the month | Attend at least | Can be absent |
|---|---|---|
| 20 | 15 | 5 |
| 22 | 17 | 5 |
| 25 | 19 | 6 |
| 30 | 23 | 7 |
Check the 25-day row: 19 ÷ 25 = 76%, while 18 ÷ 25 = 72%. The safe minimum is 19 even though 75% of 25 is 18.75.
Days to attend in a semester or school year
| Total days in the period | Attend at least | Can be absent |
|---|---|---|
| 90 | 68 | 22 |
| 120 | 90 | 30 |
| 180 | 135 | 45 |
| 200 | 150 | 50 |
| 220 | 165 | 55 |
| 240 | 180 | 60 |
The 90-day row also needs rounding: 75% of 90 is 67.5, but 67 days is 74.4%, so the minimum is 68.
Which days count in the total?
Use the days your institution actually counts, not the calendar. Weekends, public holidays and days with no teaching usually do not count. Check whether your record counts days, periods or hours: a day with six periods may be six entries. If one number is days and another is classes, the result will not match the official record. Our class-hours calculator handles hours.
What if the year is already under way?
Most people ask this in the middle of a term, so work from your record. Two questions matter:
- How many more days can I miss? attended × 100 ÷ 75 − held, rounded down. With 120 attended out of 150 held (80%), that is 160 − 150 = 10 more days; 120 of 160 is exactly 75%.
- How many days in a row must I attend to recover? ⌈(75 × held − 100 × attended) ÷ 25⌉. With 70 attended out of 100 held, you need 20 days in a row: 90 of 120 is exactly 75%.
Put your own numbers into the attendance calculator, or open the recovery calculator if you are already below the line.
Do not treat the limit as a target
The number of days you can miss is a boundary, not a plan. Illness, transport problems and a corrected record can each take a day or two. Keep a buffer of a few days, and check your own tracker against the official record regularly.
Rules differ between schools, boards and universities. Many use 75%, but some use a different percentage, count per subject, or allow condonation for medical reasons. Read your own rule before relying on any calculator, including ours.
More attendance tools
Common questions
75% attendance means how many days in a month?
In a 20-day month attend at least 15 days; in 22 days, 17; in 25 days, 19; in 30 days, 23. Always round up, because 16 of 22 days is only 72.7%.
How many days must I attend if the school year has 200 days?
At least 150 days at 75%, which allows 50 absent days. For 180 days it is 135 and for 220 days it is 165.
Is 75% counted on the whole year or only on days so far?
That depends on your institution's rule. Many count the whole year or term, so a bad start can be repaired later, but your percentage so far is still what you can check today.
How many days in a row must I attend to reach 75%?
Use ⌈(75 × held − 100 × attended) ÷ 25⌉. With 70 attended out of 100 held you need 20 days in a row, which gives 90 of 120, exactly 75%.