Calculate your turnover rate
Use employee counts and exits for the same team and time period. This calculator measures departures relative to average headcount. It does not rate the quality of your workplace.
Your result
Calculation steps
Previous-period comparison
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How to calculate employee turnover rate
Turnover rate (%) = departures during the period ÷ average employee headcount during the same period × 100
First, define the period and the employee group. Next, count the departures in that period. Then find the average number of employees in the same group. Divide departures by average headcount and multiply by 100.
For a quick estimate, average the opening and closing counts: (beginning headcount + ending headcount) ÷ 2. This is useful when staffing is fairly stable. It is less representative when the organisation expands, shrinks or hires seasonally.
Worked example
A team starts a month with 100 employees and ends with 120. Twelve departures occur during the month. Estimated average headcount is (100 + 120) ÷ 2 = 110. Monthly turnover is 12 ÷ 110 × 100 = 10.91%.
That means about 10.91 departures per 100 average employees during that month. It does not mean that exactly 10.91% of the starting employees left. Some departures may involve people hired after the month began.
Choose the right average headcount
| Method | Calculation | When to use it |
|---|---|---|
| Beginning and end | (Opening + closing count) ÷ 2 | A quick estimate with limited data. Disclose the method. |
| Known average | Your supplied average | Your HR system already provides a suitable period average, such as an average of daily counts. |
| Equal-interval snapshots | Sum of counts ÷ number of observations | You have a complete series sampled at consistent intervals, such as each month-end. |
Do not mix employee headcount with full-time equivalents. A part-time employee is still one person in a headcount measure. Use a consistent inclusion policy for temporary staff, contractors and employees on leave. Document the timing of your snapshots. An average of month-end snapshots is not necessarily the same as an average of daily headcounts.
Monthly, quarterly and annual turnover
For monthly turnover, use the month’s departures and the month’s average headcount. For a quarter, use the full quarter. For annual employee turnover, use all departures in the year and a representative average headcount for that year.
Example: 24 departures and an average of 120 employees produce an annual rate of 20%. Selecting “Annual” in this tool only changes the reporting label. It does not turn one month of data into a year.
Do not add monthly percentages to calculate annual turnover. Recalculate from the underlying annual totals and average headcount. Do not multiply a single month by 12 and present it as an observed annual result. That would be a projection with assumptions, not a measurement.
Compare like with like
A move from 8% to 10% is an increase of 2 percentage points. The relative increase is 25%. Both descriptions are valid, but they answer different questions. This tool reports percentage-point change and also shows relative change when the previous rate is above zero.
Keep duration, employee group, departure categories and denominator method consistent. A yearly total should not be compared directly with a monthly rate. Small teams can have large percentage changes after just one departure.
Total, voluntary and involuntary departures
Total turnover uses all departures within your defined reporting scope. Voluntary turnover uses employee-initiated departures. Involuntary turnover uses employer-initiated departures. Use the same average employee headcount as the denominator for each measure.
Changing the dropdown does not classify your data. You must enter the correct departure count for the selected category. Retirement, contract expiry, death and internal transfers may be treated differently across reporting systems. Document your definitions rather than forcing every case into a category.
For an organisation-wide measure, moving to another department is not an exit from the organisation. A department-level metric may track that movement separately. Keep the boundary of your employee group clear.
How to interpret the result
There is no universal percentage that makes turnover “good” or “bad.” Industry, job type, seasonality and organisational changes matter. A number can highlight a question. It cannot tell you why someone left.
A rate above 100% is possible. For example, 15 departures divided by an average headcount of 10 gives 150%. Repeated hiring and departures can produce more exits than the average number of occupied positions. The calculator warns you to check the inputs but does not cap the result.
Turnover is not the same as retention. Retention commonly follows a starting group and asks how many of those employees remain. Do not assume retention equals 100% minus this turnover rate.
Frequently asked questions
Can average headcount be a decimal?
Yes. An average of whole-number counts can be fractional. Keep the unrounded average for the calculation. This tool rounds displayed results to two decimal places and does not round intermediate values.
What happens if average headcount is zero?
The rate is undefined because division by zero is not possible. The tool asks for a positive average. It does not report 0% for an empty denominator.
Are hires needed for the formula?
No. Hires affect headcount, but they are not added to the departure numerator. Opening headcount, hires, exits and closing headcount can be useful for checking your source data.
Is employee turnover the same as revenue turnover?
No. This calculator is for staff departures. It does not calculate sales, inventory turnover or accounts receivable turnover.
Related tools and resources
For time reporting, use the Minutes to Hundredths Calculator to convert worked minutes into decimal hours.
For work-pattern planning, use the 9/80 Work Schedule Calculator. It builds a dated schedule. It does not predict whether a schedule will reduce turnover.
Methodology, sources and limits
This calculator uses a departures-to-average-headcount ratio. See the CIPD turnover and retention factsheet for professional context. Its full text may require membership.
External benchmarks can use different methods. In particular, the BLS JOLTS annual average separations rate divides the sum of monthly separations by the sum of monthly employment levels. That is not the same denominator as a company’s annual departures divided by its average annual headcount. Do not compare the two as if they were identical.
Sources checked September 16, 2026. NumberInWord.com is independent and is not affiliated with CIPD or BLS. Results depend on the counts and definitions supplied. This tool is for general reporting assistance, not legal advice, an HR audit or an employee-level decision.