Attendance Percentage Calculator

Worked example

18 attended out of 20 — 90%

Quick answer

Are cancelled classes included?

Only include classes your institution counts toward attendance.

What is the Attendance Percentage Calculator?

Calculate attendance percentage from attended and total classes. Use it when you have the required inputs and want a deterministic, repeatable result with the calculation method visible.

How to use this calculator

Enter the values requested by the tool, keep units and time periods consistent, resolve any validation message, calculate, then review the primary answer together with the displayed formula and supporting values.

Formula and method

This calculator uses a deterministic formula and shows the calculation breakdown with the result so the answer can be checked.

Worked example

18 attended out of 20 90%

Common mistakes to avoid

Check units, decimal points, percentages, signs, date/time order, selector choices, and rounding. For important decisions, verify the result against an independent source or qualified professional when appropriate.