Below is a description on what formula we use to calculate employee turnover in our "HR dashboard" overview.
Annual turnover
Last 365 days
Formula:
number of employees terminated during last 365 days / (number of active employees today + number of active employees 365 days ago) * 2 * 100
Monthly turnover
Last 30 days
Formula - Same as for annual formula, just using the last 30 days:
number of employees terminated during last 30 days / (number of active employees today + number of active employees 30 days ago) * 2 * 100
First year turnover
Last 365 days
terminated employees who worked less than 365 days / employees terminated within last 365 days * 100