Class Attendance Percentage Calculator

Class attendance percentage calculator for meeting minimum attendance rules

Many schools, colleges, and training programs require a minimum attendance percentage before you can sit for exams, submit final assessments, or receive course credit. The problem is that attendance is easy to misjudge when you are counting weeks, holidays, cancellations, and partial attendance. This calculator is built for one decision: checking whether you meet a required attendance threshold and what you need to do next to stay above it.

In the default view, you only enter two numbers: how many classes you have attended and how many classes have been held so far. The calculator then shows your current attendance percentage, the gap to a typical minimum requirement, and a clear status message. If you want a more realistic estimate for your institution, you can add a required minimum percentage and the total number of classes in the term, and the calculator will estimate how many future classes you can miss or must attend to finish the term above your target.

The advanced options exist for common edge cases. Some institutions treat excused absences differently, so you can optionally enter excused absences to view an adjusted attendance figure that removes excused sessions from the denominator. This does not replace your institution’s official policy, but it helps you sanity check both ways of calculating attendance when you are unsure how they record medical leave, approved events, or official exemptions.

Assumptions and how to use this calculator

• “Classes held so far” means sessions that actually took place. Do not include cancelled classes that were never run.
• “Classes attended so far” means you were present for the session. If your institution records partial attendance, you should convert it to your best whole number estimate.
• If you enter excused absences, the calculator shows an additional “adjusted” percentage using held minus excused as the denominator. If your institution does not exclude excused absences, ignore the adjusted line.
• If you enter a required attendance percent, the calculator compares your current percentage to that target and tells you whether you currently meet it.
• If you enter total classes in term, the calculator assumes future classes will be counted normally and estimates how many you can still miss or must attend from today to finish above the requirement.

Common questions

What is the attendance percentage formula?

The basic formula is attendance percentage equals classes attended divided by classes held, multiplied by one hundred. For example, 18 attended out of 24 held is 75%. If you use excused absences, the adjusted version divides attended by held minus excused, then multiplies by one hundred.

What if I do not know the total classes in the term?

You can still get a useful answer. Leave total term classes blank and use the calculator to check your current percentage. The “how many can I miss” planning output depends on knowing how many classes remain, so it is only shown when you provide a total term number.

Why does the calculator warn if attended is higher than held?

Attendance cannot exceed classes held. If you see that warning, one of your numbers is wrong. The most common mistake is entering scheduled classes instead of classes that actually took place, or counting excused sessions as attended.

Do excused absences count against attendance?

Policies vary. Some institutions count excused absences as absences, some exclude them from the calculation, and some use a separate “condoned” category with limits. This calculator shows an optional adjusted percentage so you can understand the impact if excused sessions are excluded. For official decisions, match your institution’s policy.

How accurate is the “classes I can miss” result?

It is accurate for the assumptions used: future classes are counted normally, and the requirement is a simple percentage of total counted classes. If your institution uses weighted attendance, different rules for labs versus lectures, or caps on condoned absences, the planning result can be directionally useful but not official. The safest use is as a planning guide, then confirm with your course administrator if you are close to the cutoff.