Attrition and turnover are related concepts, but they have different scopes and calculations.
Attrition typically refers to the natural reduction in the workforce over time without necessarily replacing those who leave. Turnover includes both departures and new hires, measuring the rate at which employees are replaced.
Attrition is often viewed as a long-term trend that may be part of a company's strategy, whereas turnover is a broader measure of workforce fluidity that can indicate short-term fluctuations in staffing.