In finance, asset turnover (ATO), total asset turnover, or asset turns is a financial ratio that measures the efficiency of a company's use of its assets in generating sales revenue or sales income to the company. Asset turnover is considered to be a profitability ratio, which is a group of financial ratios that measure how efficiently a company uses assets. Asset turnover can be furthered subdivided into fixed asset turnover, which measures a company's use of its fixed assets to generate revenue, and working capital turnover, which measures a company's use of its working capital (current assets minus liabilities) to generate revenue. Total asset turnover ratios can be used to calculate return on equity (ROE) figures as part of DuPont analysis. As a financial and activity ratio, and as part of DuPont analysis, asset turnover is a part of company fundamental analysis.

Companies with low profit margins tend to have high asset turnover, while those with high profit margins have low asset turnover. Companies in the retail industry tend to have a very high turnover ratio, due mainly to cutthroat and competitive pricing.

$${\displaystyle {\text{ATO}}={\frac {\text{Net Sales Revenue}}{\text{Average Total Assets}}}}$$