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Inventory Turnover

Inventory turnover is how many times the stock sells through and gets replaced in a period: cost of goods sold divided by average inventory, the speed at which capital tied up in product becomes cash again.

Updated August 18, 2026

Why inventory turnover matters

Inventory is money sleeping in a warehouse: turn it fast and the same capital funds several rounds of sales a year; turn it slowly and cash suffocates inside stock while storage costs tick and styles age. For inventory-heavy founders, turnover is the metric that decides how much business the balance sheet can carry.

Reading and improving turnover

  • Compute it per categoryThe blended number hides the sleepers
  • Pair with marginFast-and-thin versus slow-and-rich are both viable, knowingly
  • Raise it from both endsBetter forecasts in, faster markdowns out
  • Watch the trendSlowing turnover is cash flow trouble arriving early

Questions

What’s a good inventory turnover for ecommerce?

Category-dependent by nature: fashion and consumables expect many turns a year, durable and luxury goods fewer. The usable benchmark is your own trajectory and your category’s norm, not a universal number.

Can turnover be too high?

Yes: chronic stockouts, panic reorders, and lost sales are the symptoms of stock run too lean. Turnover is optimized against availability, and safety stock is the deliberate brake.

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