The standard HR metric measuring what share of a workforce left over a given period.
How it works
The average headcount (starting plus ending, divided by 2) is used as the base; dividing the number of separations by that average and converting to a percentage gives the turnover rate.
What this does not include
This does not include distinguishing voluntary from involuntary departures — the total separations figure includes all types of employee exits.
How to use this calculator
- Enter the number of separations and the starting and ending headcount for the period.
A worked example
10 separations, starting headcount 100, ending headcount 120: average headcount = (100+120)/2 = 110, turnover rate = 10 ÷ 110 × 100 = 9.09%.
5 separations with a stable headcount of 50: turnover rate = 10%.
What the variables mean
| Variable | Meaning |
|---|---|
| Separations | Employees who left during the period |
| Starting/ending headcount | Employee count at the start and end of the period |
Edge cases worth knowing
This uses average headcount, not just the starting or ending figure. Using either endpoint alone would misstate the rate if headcount changed significantly during the period — averaging smooths that out.
Zero average headcount makes the rate undefined — there’s no workforce base to divide separations by, so the calculator declines to show a result.
Frequently asked questions
Why use average headcount instead of just the starting number?
Average headcount accounts for growth or shrinkage during the period, giving a more accurate base for the turnover percentage than a single snapshot.
What’s considered a “good” turnover rate?
It varies significantly by industry — some sectors with naturally high turnover (like retail or hospitality) have very different benchmarks than others (like government or education).
Does this distinguish voluntary resignations from layoffs?
No — this calculates overall turnover from total separations; tracking voluntary versus involuntary departures separately requires additional data beyond this calculator’s scope.
