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Employee Attrition Rate Calculator — result sheet
Calculate attrition and retention percentages from departures and average headcount over a selected period.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Average headcount = (beginning+ending)/2; attrition = departures/average headcount × 100; retention = 100−attrition.
The descriptive ratio uses average beginning and ending headcount as the denominator for the selected period.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Departures — minimum 0; maximum 1000000000
- Beginning headcount — minimum 1.0E-6; maximum 1000000000
- Ending headcount — minimum 0; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Departures | 12 |
| Beginning headcount | 100 |
| Ending headcount | 110 |
Attrition ≈ 11.429%; retention ≈ 88.571%.
Assumptions and limits
- Headcounts are nonnegative and the average headcount is positive.
- Departures are recorded consistently for the same period.
- Reasons, involuntary versus voluntary exits, hiring, seasonality, and employment decisions are not inferred.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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