Employee Turnover Calculator

Employee turnover measures how fast people leave. Divide separations by the average headcount and you get the rate that HR benchmarks against the industry.

Starting headcountThe number of people at the start of the period.Ending headcountThe number of people at the end of the period.SeparationsThe number who left during the period, voluntary and involuntary together.Months in the periodThe length of the window. Used to annualise the rate.

Turnover rate

14.40%

Retention rate: 85.60%
Annualised turnover: 14.40%
Average headcount: 125
Hires needed to reach the ending count: 28

Values update as you type. This calculator covers the single scenario its formula assumes — see Common Mistakes for what it leaves out.

The formula this calculator uses

turnover rate = separations / average headcount

separations: The number of people who left in the period
average headcount: The mean of the starting and ending counts
retention: One minus the turnover rate
period: The window the separations were counted over

How to check the result by hand

1
Count the separations
Eighteen people left during the period. Count voluntary resignations and involuntary dismissals together for the headline figure.
2
Find the average headcount
Starting at 120 and ending at 130 averages to 125. Using the starting count alone would understate the rate for a growing team.
3
Divide
18 divided by 125 is 0.144, so the turnover rate is 14.4 percent. The retention rate is the complement, 85.6 percent.
4
Annualise if the period is shorter
For a six month window multiply by twelve over six. The example period is already twelve months, so the annualised rate matches at 14.4 percent.

For worked examples, common mistakes and the limits of this formula, read the full How To Calculate Employee Turnover page.