# Free Attrition Rate Calculator

> Calculate employee attrition rate and analyze turnover trends. Free, no sign-up, by Staff Khata.

Attrition rate = employees who left ÷ average headcount × 100, where average headcount = (headcount at start + headcount at end) ÷ 2. Example: 10 people left in a quarter that started with 100 and ended with 90 staff, so 10 ÷ 95 × 100 = 10.5% for the quarter, or about 42% annualised (× 12 ÷ 3).

## Inputs

- Employees at Start of Period
- Employees at End of Period
- Employees Who Left
- Period (Months)

## Frequently asked questions

### What is the difference between attrition and turnover?

They are often used interchangeably. Strictly, attrition counts people who leave and are not replaced; turnover counts all leavers whether or not the role is filled again.

### How do I annualise a monthly attrition rate?

Multiply by 12 divided by the number of months measured. A 3% monthly rate is about 36% a year.

Use the calculator: https://staffkhata.com/free-tools/attrition-rate-calculator