Quick answer
Attendance % = (hours present ÷ hours expected) × 100
Formula
- (present ÷ expected) × 100
- Policy defines expected and present
Introduction
Schools and employers track attendance as a percent so trends are visible across weeks and terms.
Hour-based attendance respects partial days better than a simple present-or-absent flag when policies allow it.
Enter present hours as a and expected hours as b on the Time Percentage Calculator for quick results.
See also time percentage examples for school and shift rows.
Overview
Expected hours may come from the class schedule, instructional day length, or standard shift.
Present hours count time actually attended, including partial hours when logs support them.
Policies differ on excused absences, tardiness, and whether breaks count.
The calculator does not apply policy rules; it only computes the ratio you supply.
Formula
- (present ÷ expected) × 100
- Policy defines expected and present
Term attendance often sums present and expected hours across weeks, then divides once.
Daily attendance uses that day as both part and total scope.
Do not confuse attendance percentage with grade percent or productivity percent.
Step-by-step
- Read the policy. Know what counts as expected and present.
- Collect hour logs. Roster, sign-in, or timesheet exports.
- Sum present (a) and expected (b). Use the same period for both sums.
- Compute (a ÷ b) × 100. Round per institutional rules.
- Document excused gaps separately if required. Some policies adjust b before division.
Worked example
6.5 present, 7 expected → about 92.86%.
Term: 280 present, 300 expected → about 93.33%.
Four-hour day policy: 3.5 present, 4 expected → 87.5%.