Absence Rates Capacity (Individual) Calculator
Estimate an individual's available working days, productive hours and effective capacity after planned and unplanned absences.
Overview
This Absence Rates Capacity (Individual) Calculator estimates the working time one person is likely to have available over a year. Enter their scheduled workdays, daily hours, annual leave, public holidays, sickness absence, training and other expected absences to see the remaining days and hours.
How it works
The calculator adds every absence category to find total unavailable days. It subtracts those days from scheduled annual workdays to estimate available working days, then multiplies the result by hours per day. The absence rate is total absence days divided by scheduled workdays, while the effective capacity rate is the remaining available share of scheduled time.
How to use this calculator
- 1Enter the person's scheduled working days for the year.
- 2Add their normal number of hours per working day.
- 3Enter expected annual leave and public holiday days.
- 4Add expected sickness, training and other absence days.
- 5Review the available productive hours and effective capacity rate.
Example Calculation
Scheduled working days per year
260
Hours per working day
7.5
Annual leave days
25
Public holiday days
8
Sickness absence days
5
Training and development days
5
Other absence days
3
Available productive hours
1,605.0 hours per year
With 46 total absence days, 214 working days remain. At 7.5 hours per day, this equals 1,605 available hours and an effective capacity rate of about 82.3%.
Frequently asked questions
What is an individual absence rate?
It is the percentage of a person's scheduled working time that is unavailable because of absence or other included non-productive days.
Should annual leave be included in the absence rate?
For capacity planning, annual leave is usually included because it reduces time available for normal work. You can exclude it if you only want to track unplanned absence.
How many working days are there in a year?
A typical full-time pattern has about 260 weekdays before leave and public holidays, but the right figure depends on the work schedule, country and calendar year.
Does this calculator measure productivity?
No. It estimates available time. It does not measure output, workload, efficiency, quality, meetings or the complexity of the person's role.
Can I use half-day absences?
Yes. Enter decimal values such as 0.5 where your records include half days or partial-day absences.
Why is my effective capacity rate lower than 100%?
The rate falls whenever leave, public holidays, sickness, training or other entered absences reduce scheduled working time.
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Assumptions and warnings
Assumptions
- All absence categories are measured in working days and do not overlap.
- Scheduled working days represent the person's annual work pattern before the listed absences.
- Available hours are calculated using the same number of hours for every available workday.
- The result estimates time availability only; it does not adjust for workload complexity, productivity differences or meetings.
Warnings
- This calculator provides a planning estimate only. Actual absence and productive time can vary substantially by individual, role and year.