Staffing Requirement Calculator
Headcount needed for a workload, allowing for real efficiency and absence.
Results
People needed
10
People needed
9.591
Hours
125.12
h
Hours
51.20
h
What this tool does
Dividing workload by contracted hours always understates the answer, because nobody is productive every minute and nobody is there every day. Applying an efficiency factor and an absence rate first gives the hours you can actually count on from each person.
Formula
people = work load ÷ (available hours × efficiency)
Variables
| Symbol | Meaning | Unit |
|---|---|---|
wl | Total workload | h |
hp | Hours per person | h |
ef | Efficiency | % |
ab | Absence rate | % |
N | People needed | — |
NR | People needed | — |
HE | Hours | h |
SL | Hours | h |
Worked example
- Total workload1200 h
- Hours per person160 h
- Efficiency85 %
- Absence rate8 %
- People needed10
- People needed9.591
- Hours125.12 h
- Hours51.20 h
Limitations
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- The formula assumes ideal conditions: no friction losses, no air resistance and no efficiency losses unless you enter them.