Glossary term
Inventory Turnover
Inventory turnover measures how many times a company sells and replaces its inventory during a period, usually by comparing cost of goods sold with average inventory.
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What Is Inventory Turnover?
Inventory turnover measures how many times a company sells and replaces its inventory during a period. It is commonly calculated by dividing cost of goods sold by average inventory.
The ratio helps show how efficiently a business is converting inventory into sales. A higher turnover rate can signal strong demand or tight inventory management, while a lower rate can suggest excess stock, weak demand, obsolete products, or slower cash conversion.
Key Takeaways
- Inventory turnover measures how quickly inventory moves through a business.
- The common formula is cost of goods sold divided by average inventory.
- Turnover should be compared within the same industry because normal levels vary widely.
- Very high turnover is not always better if it causes stockouts or lost sales.
How to Calculate It
The standard calculation compares the cost of products sold during the period with the average inventory carried during that same period.
Cost of goods sold is the direct cost of inventory sold during the period. Average inventory is usually beginning inventory plus ending inventory divided by two. Some analysts use more frequent inventory averages when seasonal swings are large.
Turnover Pattern | Possible Interpretation |
|---|---|
Higher than peers | Strong sales, efficient purchasing, or lean inventory. |
Lower than peers | Slow-moving products, excess stock, or demand weakness. |
Rising quickly | Improving demand or tighter inventory control. |
Too high | Possible stockouts, supplier strain, or missed sales. |
Reading the Ratio
Inventory turnover is most useful when compared with a company's own history and with peers in the same industry. A grocery chain, apparel retailer, auto dealer, and manufacturer will naturally carry different inventory levels and sell through stock at different speeds.
The ratio also connects to cash flow. Inventory ties up working capital until it is sold. Slow turnover can leave cash sitting on shelves, while faster turnover can reduce storage costs and improve liquidity. But pushing inventory too low may hurt service levels or make the business vulnerable to supply disruptions.
The Bottom Line
Inventory turnover shows how efficiently a business turns inventory into sales. It is a useful operating and investing metric, but it needs industry context and should be read alongside margins, cash flow, supplier reliability, and customer demand.