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Glossary

What is inventory turnover?

Inventory turnover measures how many times a business sells and replaces its inventory over a period, usually a year.

Definition

Turnover is the speed gauge for inventory. Divide cost of goods sold by average inventory value and you get the number of times the stock cycled in a year. A turnover of 6 means inventory turned over every two months on average. Higher turnover means less cash sitting on shelves; lower turnover means stock is aging. What counts as good depends entirely on the business. A grocery distributor might turn 15 to 25 times a year. A specialty parts supplier holding slow-moving repair stock might run at 2 to 4 and be perfectly healthy, because the cost of a stockout on a critical part dwarfs the carrying cost. Comparing your number against an unrelated industry benchmark is a waste of a meeting. The more useful move is to compute turnover per SKU or per category, not just for the whole business. The aggregate number hides the story: a few fast movers can mask a back aisle full of dead stock. Per-SKU turnover sorted ascending is a ready-made list of items to discount, return to the supplier, or stop reordering.

Formula

Inventory Turnover = Cost of Goods Sold / Average Inventory Value

Example

A bike shop has COGS of $480,000 for the year and average inventory of $120,000. Turnover = 480,000 / 120,000 = 4, so stock turns roughly every three months.

By Cameron Priest · Co-founder, Order3

Cameron co-founded TradeGecko, the inventory platform acquired by Intuit. He has spent more than a decade building software for the people who run physical stock.

Updated 2026-06-16