Absence Rates Capacity Calculator Examples
Worked annual absence capacity examples showing available staff hours, lost absence hours, capacity rates, and FTE capacity.
These worked examples show how different workforce sizes, working patterns, and absence rates affect annual available capacity. Each estimate starts with scheduled hours and then deducts expected absence hours.
Standard office team: 20 employees at 4% absence
A manager wants a yearly capacity estimate after planned leave and holidays have already been excluded from working weeks.
Input Summary
Employees
20
Weekly hours per employee
37.5 hours
Working weeks
46 weeks
Annual absence rate
4%
Calculation Breakdown
- 1Scheduled annual hours20 × 37.5 × 4634,500 hours
- 2Hours lost to absence34,500 × 4%1,380 hours
- 3Available annual capacity34,500 − 1,38033,120 hours
- 4Available FTE33,120 ÷ (37.5 × 46)19.20 FTE
Result Summary
Available FTE
19.20 FTE
Absence Rates Capacity Calculator
The team retains an estimated 33,120 annual hours, or 19.20 FTE, after absence.
Part-time service team: 12 employees at 6% absence
A service department has a mixed part-time workforce averaging 30 hours per employee per week.
Input Summary
Employees
12
Average weekly hours per employee
30 hours
Working weeks
47 weeks
Annual absence rate
6%
Calculation Breakdown
- 1Scheduled annual hours12 × 30 × 4716,920 hours
- 2Hours lost to absence16,920 × 6%1,015.2 hours
- 3Available annual capacity16,920 − 1,015.215,904.8 hours
- 4Available FTE15,904.8 ÷ (30 × 47)11.28 FTE
Result Summary
Available FTE
11.28 FTE
Absence Rates Capacity Calculator
The team has an estimated 15,905 available hours and 11.28 FTE of annual capacity.
Larger operations team: 50 employees at 2.5% absence
An operations team wants to estimate retained annual capacity where planned shutdowns have already been removed.
Input Summary
Employees
50
Weekly hours per employee
40 hours
Working weeks
44 weeks
Annual absence rate
2.5%
Calculation Breakdown
- 1Scheduled annual hours50 × 40 × 4488,000 hours
- 2Hours lost to absence88,000 × 2.5%2,200 hours
- 3Available annual capacity88,000 − 2,20085,800 hours
- 4Available FTE85,800 ÷ (40 × 44)48.75 FTE
Result Summary
Available FTE
48.75 FTE
Absence Rates Capacity Calculator
The workforce retains 85,800 annual hours, equal to 48.75 FTE and 97.5% of scheduled capacity.
Small team with elevated absence: 8 employees at 8% absence
A team lead is using a cautious absence allowance for planning purposes.
Input Summary
Employees
8
Weekly hours per employee
37.5 hours
Working weeks
48 weeks
Annual absence rate
8%
Calculation Breakdown
- 1Scheduled annual hours8 × 37.5 × 4814,400 hours
- 2Hours lost to absence14,400 × 8%1,152 hours
- 3Available annual capacity14,400 − 1,15213,248 hours
- 4Available FTE13,248 ÷ (37.5 × 48)7.36 FTE
Result Summary
Available FTE
7.36 FTE
Absence Rates Capacity Calculator
The team has an estimated 13,248 available hours, equivalent to 7.36 FTE.
How to Read Your Results
Available annual capacity is the estimated total workforce hours remaining after the absence allowance.
Hours lost to absence show the planned reduction from scheduled hours, not a prediction of exact absence dates.
Available FTE converts remaining hours into equivalent employees working the entered weekly hours and weeks.
The available capacity rate is 100% minus the absence rate.
Use annual totals alongside shift, workload, and skills information when reviewing operational cover.
Assumptions & Important Notes
- Working weeks exclude planned leave, public holidays, and known closures.
- Each example applies one average working pattern to all employees in the group.
- The absence percentage is applied uniformly to scheduled annual hours.
- Figures are planning estimates and may be rounded for display.
Related Examples
Frequently Asked Questions
What does 4% absence mean in annual capacity planning?
It means the calculation removes 4% of scheduled annual hours and retains 96% as estimated available capacity.
How do I calculate annual absence hours for a part-time team?
Calculate the group's scheduled hours using its average weekly hours and working weeks, then multiply that total by the absence percentage.
Can I combine full-time and part-time employee examples?
For greater accuracy, calculate each group separately using its own hours and weeks, then add the available hours together.
Why do these examples use working weeks instead of 52 weeks?
Working weeks can exclude known non-working time such as planned leave, public holidays, and closures before unplanned absence is applied.
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