People & employment
Shift staffing coverage Calculator
Calculate workforce capacity needed to cover operating hours and absence. This free shift staffing coverage calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Calculate workforce capacity needed to cover operating hours and absence.
Calculated outcomes
- Effective Hours Per Employee
- 31.88
Assumptions and estimates
- Unavailable percentage combines leave, training and absence within contracted hours. A capacity estimate cannot establish a feasible roster; breaks, rest rules, shift overlaps and skills still need scheduling.
- Method: Required people = weekly operating hours × concurrent staffing ÷ effective weekly hours per employee.
- This is aggregate capacity. Actual rosters must account for skills, overlaps, breaks and applicable rest rules.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the shift staffing coverage calculation works
Required people = weekly operating hours × concurrent staffing ÷ effective weekly hours per employee.
This is aggregate capacity. Actual rosters must account for skills, overlaps, breaks and applicable rest rules.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review employees required and exact staff required and weekly coverage hours, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Operating hours per week
- 112
- People continuously required on duty
- 3
- Contracted weekly hours per employee
- 37.5
- Leave, absence and training share (%)
- 15
- Employees Required
- 11
- Exact Staff Required
- 10.5412
- Weekly Coverage Hours
- 336