function calculateTurnover() {
// Get input values
var startEmp = document.getElementById('startEmployees').value;
var endEmp = document.getElementById('endEmployees').value;
var separations = document.getElementById('separations').value;
// Validation
if (startEmp === "" || endEmp === "" || separations === "") {
alert("Please fill in all fields to calculate the turnover rate.");
return;
}
var startVal = parseFloat(startEmp);
var endVal = parseFloat(endEmp);
var sepVal = parseFloat(separations);
if (startVal < 0 || endVal < 0 || sepVal < 0) {
alert("Please enter positive numbers only.");
return;
}
if (startVal === 0 && endVal === 0) {
alert("Employee count cannot be zero for both start and end periods.");
return;
}
// Calculation Logic
// Formula: (Separations / Average Employees) * 100
// Average Employees = (Start + End) / 2
var averageEmployees = (startVal + endVal) / 2;
// Prevent division by zero
if (averageEmployees === 0) {
document.getElementById('results').style.display = 'block';
document.getElementById('avgResult').innerHTML = "0";
document.getElementById('rateResult').innerHTML = "0%";
document.getElementById('annualResult').innerHTML = "0%";
return;
}
var turnoverRate = (sepVal / averageEmployees) * 100;
// Annualized Projection (Assuming the period entered is 1 month)
// This is a rough estimation based on the current period input
var annualizedRate = turnoverRate * 12;
// Update DOM
document.getElementById('results').style.display = 'block';
document.getElementById('avgResult').innerHTML = averageEmployees.toFixed(1);
document.getElementById('rateResult').innerHTML = turnoverRate.toFixed(2) + "%";
document.getElementById('annualResult').innerHTML = annualizedRate.toFixed(2) + "% (if period was 1 month)";
}
Employee Turnover Rate Calculator & Excel Guide
Understanding your workforce dynamics is crucial for maintaining a healthy company culture and reducing costs. This calculator helps you determine your employee turnover rate for a specific period (monthly, quarterly, or annually). Below, you will also find a guide on how to build this exact calculator within Microsoft Excel.
What is Employee Turnover Rate?
The turnover rate is the percentage of employees who leave an organization during a certain period of time. This includes voluntary resignations, dismissals, and retirements. A high turnover rate can indicate issues with company culture, compensation, or management, while a very low rate might suggest stagnation.
The Mathematical Formula
To calculate turnover, you need three specific data points:
Start Count (S): Number of employees at the beginning of the period.
End Count (E): Number of employees at the end of the period.
Separations (L): Number of employees who left during the period.
If you prefer to maintain your data in a spreadsheet, you can replicate the logic of this web calculator using standard Excel formulas. Follow these steps to set up your sheet:
Step 1: Set Up Your Columns
Create a header row with the following labels:
Cell A1
Cell B1
Cell C1
Cell D1
Start Count
End Count
Separations
Turnover Rate
Step 2: Enter Your Data
Input your raw numbers in row 2 (e.g., A2, B2, C2).
Step 3: The Excel Formula
In cell D2, paste the following formula:
=C2/((A2+B2)/2)
Important Formatting: By default, Excel will show this result as a decimal (e.g., 0.05). To view it as a percentage:
Click on cell D2.
Go to the "Home" tab.
Click the "%" button in the Number section (or press Ctrl + Shift + %).
Interpreting Your Results
Once you have your percentage, context is key:
Analyze the Trend: Compare the result against previous months or years. Is it rising?
Industry Benchmarks: Retail and hospitality often have higher turnover rates (over 60% annually) compared to finance or education.
Voluntary vs. Involuntary: It is often helpful to separate people who quit (voluntary) from those who were fired or laid off (involuntary) to understand the root cause.
Using this calculator or the Excel formula provided allows HR teams to quantify retention challenges and measure the success of employee engagement initiatives.