What the Absence Percentage Calculator measures
The absence percentage calculator estimates the share of scheduled working time that was missed during a period you choose. It divides the time people were absent by the time they were scheduled to work, so a result of 5.0% means that 5.0% of scheduled working time was missed. You can calculate it for one employee or for a whole team, in days or in hours, and the page also shows the matching attendance percentage.
The calculator does not sort absences by reason. It divides whatever absent time you enter by scheduled time, so the absence definition menu (all counted absences, unplanned absence, or sickness absence) is there to label the result and to remind you which absences belong in the input. The definition you pick appears beside the inputs and again in the result, so a printed or copied result still says what it measures.
This page is about workplace absence. It does not calculate student attendance, and it does not estimate what absence costs.
Calculator inputs
The inputs depend on whether you are measuring one employee or a team, but they all come down to two quantities in the same unit: absent time and scheduled time.
- Absent time. Total days or hours absent, counting only the absences that fit your definition.
- Scheduled time. For one employee, the days or hours that person was scheduled to work in the period. For a team, either the employee count multiplied by scheduled time per employee, or the total scheduled time already added up across the group.
- Unit. Days or hours. Enter absent and scheduled time in the same unit.
- Measurement period. Week, month, quarter, year or a period you name yourself. This labels the result; it does not change the maths, so the numbers you enter must really cover that period.
It helps to separate two numbers that are easy to confuse. Scheduled workdays per employee is one person's scheduled days in the period, for example 21. Total scheduled employee-days is that figure added up across the workforce, for example 20 employees × 21 days = 420. The calculator asks for the first when you choose Employees × scheduled time each and for the second when you choose Total scheduled time.
Which option to use depends on the data you have. Use a fixed or average employee count only when schedules are similar and headcount was steady. If employees work different hours, joined or left during the period, or follow variable schedules, add up the real scheduled time from your rota or timekeeping records and enter it as the total.
The absence percentage formula and a worked example
The formulas in plain text, ready to copy:
Individual absence percentage = individual absent days ÷ individual scheduled workdays × 100
Workforce absence percentage = total absent days ÷ (employee count × scheduled workdays per employee) × 100
Hours-based absence percentage = total absent hours ÷ total scheduled hours × 100
Attendance percentage = 100 − absence percentage
Worked example: a team for one month
These figures are illustrative. A team has 20 employees, each scheduled for 21 workdays in the month, and the team missed 21 days in total.
- Denominator: 20 × 21 = 420 scheduled employee-days
- Calculation: 21 ÷ 420 = 0.05, and 0.05 × 100 = 5.0%
- Attendance percentage: 100 − 5.0 = 95.0%
The result measures missed working time, not the percentage of employees who were absent. Those 21 days could be one person missing a full month's worth of days, three people missing seven days each, or 21 people missing one day each; the percentage is 5.0% in every case. The Load example values button in the calculator reproduces this case.
Multiplying headcount by scheduled days also assumes that the schedule suits every employee being measured. When it does not, as the part-time example below shows, use actual scheduled time instead.
Individual and team absence percentage
The calculator has separate modes for the two cases.
For an individual, divide that person's absent time by their own scheduled time. An employee who missed 3 of 22 scheduled workdays has an absence percentage of 3 ÷ 22 × 100 = 13.64%.
For a team, combine the absent time and combine the scheduled time, then divide. Do not average the individual percentages, because that gives every person the same weight even when their scheduled time differs. For example, one employee missed 2 of 10 scheduled days (20%) and another missed 3 of 20 scheduled days (15%). The simple average of the two percentages is 17.5%, but the combined figure is 5 ÷ 30 × 100 = 16.67%, which is the correct team result.
For a department or the whole organization, add the absent time and the scheduled time of each group, then divide once. Only combine groups that use the same period, the same unit (all days or all hours) and the same absence definition. Do not mix a monthly figure for one group with a quarterly figure for another, and do not add days to hours.
Which absences to include
What counts as an absence is a decision for your organization, and the percentage is only as consistent as that decision. The calculator takes the absent time you enter and applies the definition you selected as a label.
- Sick days, call-offs, no-shows and other unplanned absences. These are the core of an unplanned-absence measure. A sickness-absence measure keeps only time missed for the employee's own illness or injury.
- Vacation, approved PTO and other planned leave. A measure of unplanned or sickness absence leaves them out. A measure of all counted absences includes only what you decide to count. Decide, too, whether planned leave stays in scheduled time, and apply the same rule every period.
- Weekends and holidays. Days when the workplace is closed or the employee is not scheduled are not missed scheduled time, so they belong in neither the absent time nor the scheduled time.
The selected definition is shown next to the inputs and repeated in the result, so anyone reading the result can see which absences it covers.
Hours, partial days and variable schedules
Absences are not always whole days. Switch the unit to hours to enter partial-day absences such as a late arrival or an early departure, or stay in days and enter a fraction such as 0.5. For example, 12.5 hours absent out of 168 scheduled hours is 12.5 ÷ 168 × 100 = 7.44%.
Part-time employees and different shift lengths are where a simple headcount calculation goes wrong, because it treats everyone as working the same amount. Suppose 10 full-time employees are scheduled for 40 hours a week and 6 part-time employees for 20 hours a week, over 4 weeks:
- Actual scheduled time: (10 × 40 + 6 × 20) × 4 = 2,080 hours
- With 104 absent hours: 104 ÷ 2,080 × 100 = 5.0%
- If all 16 people were treated as full-time (16 × 160 = 2,560 hours): 104 ÷ 2,560 × 100 = 4.06%, which understates the true figure
When employees do not share a uniform schedule, use the combined actual scheduled time. An average headcount is suitable when schedules are similar and headcount is stable. Detailed scheduled-time data is more accurate when schedules vary, when people join or leave, or when shifts differ in length.
Measurement period and changing headcount
Choose a period that suits how you review the data, such as a month, quarter or year, and make sure the absence records and the scheduled time cover exactly the same period and the same people. A year of absences divided by one month of scheduled time, or the reverse, produces a meaningless percentage.
New hires, departures and schedule changes change the time available for work, so they change the denominator. Count each person only for the days they were actually scheduled. In a month with 21 workdays, 18 employees scheduled for the whole month give 18 × 21 = 378 employee-days. A new hire scheduled for 11 days adds 11, and a leaver scheduled for 10 days adds 10, for 399 in total. With 20 absent days, the result is 20 ÷ 399 × 100 = 5.01%. Using a flat headcount of 20 × 21 = 420 would give 4.76% and quietly understate absence.
Whichever period and method you choose, keep them the same when you compare results over time. A change in method, such as a new absence definition or a switch from days to hours, can move the percentage even if nothing about attendance changed.
Results and input checks
The result shows the absence percentage, the measurement period you labeled, the scheduled-time denominator and the absent time, plus the step-by-step working. It also shows the attendance percentage when that is the true complement of the absence percentage, meaning absent and scheduled time use the same basis and absent time does not exceed scheduled time.
The calculator checks the inputs before it calculates:
- Scheduled time (and the headcount and per-employee figures behind it) must be greater than 0, because the percentage divides by it.
- Absent time cannot be negative.
- Absent time larger than scheduled time is flagged. It would give a percentage above 100%, which usually means the units, the period or the headcount do not match, so the attendance percentage is withheld.
- Zero absence is valid and produces an absence percentage of 0%, and an attendance percentage of 100%.
Interpreting the result and U.S. benchmarks
There is no universal absence percentage that is appropriate for every workplace. What looks high or low depends on the kind of work, the workforce, the absence definition and the period. Compare results only when the measurement period, workforce, absence categories and calculation method are comparable, and look at your own trend over time first. This calculator therefore does not label any result healthy or unhealthy.
The U.S. Bureau of Labor Statistics (BLS) publishes absence figures from the Current Population Survey (CPS). They are easy to mistake for this calculator's result, but they are defined differently:
- The BLS absence rate is worker-based. BLS defines it as the ratio of workers with absences to total full-time wage and salary employment. An absence is a case where a person who usually works 35 or more hours a week worked fewer than 35 hours during the survey reference week because of the person's own illness, injury or medical problems; child care problems; other family or personal obligations; civic or military duty; or maternity or paternity leave. Vacation or personal days, holidays and labor disputes are excluded, as are self-employed workers. For 2025, the annual average was 3.2% (2.2% illness or injury, 1.0% other reasons), an 11-month average because October data were not collected.
- The BLS lost worktime rate is a different measure. It is hours absent as a percent of hours usually worked, for the same group of full-time wage and salary workers. The 2025 annual average was 1.7% (1.1% illness or injury, 0.6% other reasons).
This calculator's percentage is a scheduled-time absence percentage for your own workplace. It counts the absences you choose, in your scheduled time, over your period. That is not the same as the share of workers who were absent in a survey week, and even the hours-based lost worktime rate rests on different inputs (full-time wage and salary workers, usual hours, specific reasons). Treat the BLS numbers as context rather than a target, and do not benchmark against them unless your data follow the same definition.
Related tools and what is kept separate
To work out how many scheduled weekdays a period contains, count the weekdays on a calendar and remove holidays when the workplace is closed; the number you get is the scheduled days to enter. If part-time schedules make that awkward, enter hours instead. The attendance percentage shown here is the complement of the absence percentage on the same basis, so there is no need for a separate calculation when your data are the same.
The cost of absenteeism is deliberately not part of this calculator. It needs pay, benefits and cover assumptions that vary widely, and mixing them into the percentage would make the core result harder to trust. Calculate the percentage first, then estimate cost separately if you need it. The related calculators below cover other workforce measures.