Absenteeism Rate Calculator
Absenteeism rate measures the share of scheduled work time lost to unscheduled absence across your workforce. It is a core human-resources metric used to track attendance health, compare teams, and quantify the cost of lost availability. To compute it you need three numbers: the total absence days recorded, the number of employees, and the scheduled work days in the period. This calculator multiplies employees by scheduled days to find total available days, then divides absence days by that base to return the rate as a percentage along with the supporting totals.
Absenteeism rate formula
Total available days = employees * scheduled days
Absenteeism rate = (absence days / total available days) * 100
Absence days per employee = absence days / employees
Attendance rate = 100 - absenteeism rate
The total available days is the full scheduled capacity of the workforce for the period. Dividing recorded absence days by that capacity gives the rate as a percentage. Attendance rate is simply the complement.
Using the absenteeism rate
- Enter only unscheduled absence to keep the metric meaningful; exclude approved vacation and public holidays.
- Scheduled work days per employee is typically the working days in the period (for example, around 21 in a month or 252 in a year).
- The U.S. Bureau of Labor Statistics publishes absence rates for full-time workers you can use as a comparison.
- Track the rate over consecutive periods rather than reading a single month in isolation.
- A rising rate can flag morale, scheduling, or health issues worth investigating.
Absenteeism rate: frequently asked questions
What is the absenteeism rate?
The absenteeism rate is the percentage of scheduled work time lost to unscheduled absence. It is calculated as the number of absence days divided by the total available work days (employees times scheduled days per period), multiplied by 100.
What counts as an absence for this rate?
Conventionally only unscheduled, unplanned absence counts: unapproved leave, no-shows, and unexpected sick days. Pre-approved vacation, public holidays, and planned leave are usually excluded because they are scheduled time off, not lost availability. You decide which days to enter.
What is a normal absenteeism rate?
There is no single official benchmark because it depends on industry, season, and how an employer defines absence. The U.S. Bureau of Labor Statistics publishes absence rates for full-time wage and salary workers in its Current Population Survey, which you can compare against your own computed figure.
How do I express the result as days per employee?
Divide the total absence days by the number of employees. This calculator reports the rate as a percentage of available time. To get average days lost per employee, take your entered absence days and divide by the employee count separately.
Why is total available days the denominator?
Total available days represents all the days the workforce was scheduled to work in the period. Dividing absence days by this base normalises the rate so it can be compared across teams of different sizes and across periods of different lengths.
Official sources
- U.S. Bureau of Labor Statistics: Absences from work of employed full-time wage and salary workers.
- U.S. Bureau of Labor Statistics: Employment Situation technical note.
Reviewed by the CalculatorHub team, edited by James Graham, 16 June 2026. See our methodology.