Individual Attendance Rate Formula
Learn how scheduled days and absence days are used to calculate an individual's attendance percentage, absence rate, and target difference.
This calculation converts days scheduled and days absent during the same period into attendance measures. It helps show the share of expected days attended and how that result compares with a selected target.
- 100% Free
- No Sign-Up Required
- Private & Secure
- Mobile Friendly
Attendance rate
Where:
Find the percentage of scheduled days missed, then subtract that percentage from 100%.
Variables Explained
| Variable | What It Means | Unit |
|---|---|---|
| scheduledDays - Scheduled days | The total number of days the individual was expected to attend during the reporting period. | days |
| absenceDays - Absent days | The number of recorded absence days in the same reporting period. | days |
| targetAttendance - Target attendance | The attendance percentage used only to compare with the calculated attendance rate. | percent |
| attendanceRate - Attendance rate | The percentage of scheduled days attended. | percent |
Step-by-Step Calculation
Calculate attended days
Subtract absence days from scheduled days. The lower limit of zero prevents a negative attended-day result.
attendedDays = max(0, scheduledDays - absenceDays)
Calculate absence rate
Divide absence days by scheduled days and multiply by 100. The result is capped at 100%.
absenceRate = min(100, (absenceDays / scheduledDays) * 100)
Calculate attendance rate
Attendance is the percentage remaining after the absence rate is deducted from 100%.
attendanceRate = max(0, 100 - absenceRate)
Compare with the target
A positive result is above the target; a negative result is below it. This is measured in percentage points.
attendanceDifference = attendanceRate - targetAttendance
Example: attendance across a 100-day period
Attended days
100 - 5
95 days
Absence rate
(5 / 100) × 100
5.0%
Attendance rate
100 - 5.0
95.0%
Difference from target
95.0 - 95.0
0.0 percentage points
Final Result
The individual attended 95.0% of scheduled days, had a 5.0% absence rate, and matched the 95.0% target.
Assumptions
- ✓Scheduled days and absence days refer to exactly the same reporting period.
- ✓Each absence is counted as a full day unless a decimal day value is entered.
- ✓All days entered as absent are included in the attendance measure being reviewed.
- ✓The target is a comparison value and does not change the attendance calculation.
Limitations
- !Schools, employers, and other organisations may classify authorised absences, lateness, and exclusions differently.
- !The calculator does not distinguish absence reasons or attendance categories.
- !A percentage alone does not show the timing or pattern of absences.
- !If absence days exceed scheduled days, the displayed results are capped rather than correcting the underlying records.
Common Mistakes to Avoid
Including weekends, holidays, or other non-scheduled days in the scheduled-day total.
Using absence days from a different date range than the scheduled days.
Entering a percentage, such as 5, where the field expects 5 absence days.
Forgetting to include partial-day absences as decimal values when they are part of the record.
Treating a difference from target as a percent change instead of percentage points.
Related Formulas
Frequently Asked Questions
What is the formula for individual attendance rate?
Attendance rate equals attended days divided by scheduled days, multiplied by 100. Attended days are scheduled days minus absence days.
How do you calculate absence rate?
Divide absence days by scheduled days and multiply by 100.
Why do attendance and absence rates add up to 100%?
In this calculation, every scheduled day is treated as either attended or absent.
What does a negative difference from target mean?
It means the calculated attendance rate is below the target you entered.
Ready to calculate your result?
Use the calculator to get instant results with your own inputs.