Attendance Calculator: Classes Needed for 75%

How it works

Must attend = ⌈required % × (held + remaining)⌉ − attended; can skip = remaining − must attend

Attendance percentage is attended divided by held, and the classes still to come are the only lever you have. Solving for the minimum total attended at the end of term tells you exactly how many you must be present for, and therefore how many you may miss. Universities often apply the rule per subject, so run it separately for each course with a strict teacher.

Worked example

42 of 60 attended (70%) with 30 to go: 75% of 90 is 68, so attend 26 of the last 30 — you can skip 4. Twelve straight classes would lift you back over 75%.

Frequently asked questions