Attendance Percentage Calculator
Enter how many classes were held and how many you attended to see your attendance percentage — plus how many more classes you can miss, or must attend in a row, to stay above a required threshold like 75%.
77.5%
Attendance
18
Classes missed
75%
Required
(62 ÷ 80) × 100 = 77.50%
You can miss 2 more classes and still stay at or above 75%.
misses m must keep 62 ÷ (80 + m) ≥ 0.75, so m ≤ 62 ÷ 0.75 − 80 = 2.67 → floor = 2
Frequently Asked Questions
- How is attendance percentage calculated?
- Divide the classes you attended by the classes held, then multiply by 100. Attending 68 of 80 classes is (68 ÷ 80) × 100 = 85%.
- How many classes can I miss and stay above 75%?
- If you miss m more classes, your attendance becomes attended ÷ (held + m). Keeping that at or above the target t means m ≤ attended ÷ t − held. The calculator rounds this down to a whole number of classes for you.
- I am below the required percentage — how many classes must I attend?
- Attending the next n classes in a row gives (attended + n) ÷ (held + n). Setting that equal to the target t and solving gives n ≥ (t × held − attended) ÷ (1 − t), rounded up to the next whole class.
- Why is 75% attendance the default target?
- 75% is the minimum attendance requirement at many universities and colleges, especially in India and the UK. You can change the target to whatever your institution requires, such as 80% or 85%.
- Why can I never reach a 100% target after missing a class?
- Once you have missed a class, every future ratio (attended + n) ÷ (held + n) stays below 1 no matter how many classes you attend. It approaches 100% but never reaches it, so the calculator reports the target as unreachable.