Attrition Rate Calculator

Measure employee departures relative to average headcount. Enter your own values below to see period attrition rate and check the method behind it.

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Your result and breakdown will appear here.

How this calculator works

Attrition = leavers ÷ average of opening and closing headcount × 100. The result is for the selected period, not annualized.

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What is Attrition Rate Calculator?

Attrition Rate Calculator helps you measure employee departures relative to average headcount.

The main result is period attrition rate. The formula, example and assumptions below explain how to interpret it.

How to use Attrition Rate Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather employees at period start, employees at period end and employees who left during period. Use values from the same situation or reporting period.
  2. Replace the example employees at period start with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read period attrition rate. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter employees at period start, at least 1. Use a whole number.
  • Enter employees at period end, at least 0. Use a whole number.
  • Enter employees who left during period, at least 0. Use a whole number.

Attrition Rate Calculator: a worked example

With the inputs below, the result is 9.52381 % (period attrition rate). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Employees at period start100
Employees at period end110
Employees who left during period10
Period attrition rate9.52381 %

Understanding the Attrition Rate result

The main output is period attrition rate, expressed in %. It applies to the inputs and operation you selected.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

Attrition Rate Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • CTC and take-home pay describe different amounts. Use the same month or year for all salary components.

For wider guidance, visit Employees’ Provident Fund Organisation. The formula and scope of this specific tool are stated on this page.

Attrition Rate Calculator FAQs

What does Attrition Rate Calculator calculate?

Attrition Rate Calculator helps you measure employee departures relative to average headcount. Its main output is period attrition rate in %.

What inputs do I need for Attrition Rate Calculator?

You need employees at period start, employees at period end and employees who left during period. Use the field labels and units to match your figures to the formula.

Which formula does Attrition Rate Calculator use?

Attrition = leavers ÷ average of opening and closing headcount × 100. The result is for the selected period, not annualized.

What is a worked example for Attrition Rate Calculator?

Example inputs: Employees at period start: 100; Employees at period end: 110; Employees who left during period: 10. The result is 9.52381 % (period attrition rate).

How should I enter employees at period start?

Enter employees at period start, at least 1. Use a whole number.

How do I choose employees at period end?

Enter employees at period end, at least 0. Use a whole number. The example uses 110; replace it if your circumstances differ.

How should I read period attrition rate?

The main output is period attrition rate, expressed in %. It applies to the inputs and operation you selected.

Why might my Attrition Rate Calculator result differ from my records?

CTC and take-home pay describe different amounts. Use the same month or year for all salary components. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Attrition Rate Calculator?

Yes. Note your first period attrition rate, change employees at period start or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Attrition Rate Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.