In retail, every product you stock represents an investment — in time, money, and strategy. To measure how efficiently you’re turning that investment into profit, retailers rely on an essential metric called the sell-through rate. Understanding and optimizing your sell-through rate can help you make smarter buying decisions, minimize excess inventory, and improve profitability. What Is Sell-Through Rate? The sell-through rate (STR) is a key performance indicator that measures the percentage of inventory sold over a specific period compared to the amount of inventory received. In simpler terms, it shows how quickly your products are selling. Sell-Through Rate Formula: Sell-Through Rate