Unit Economics

Inventory Turnover

See how fast stock becomes cash again — the number that quietly sets how much money a product business needs.

  • Advanced
  • 6 min total
  • 10 chapters

What decision this helps you make: How much inventory to hold, and whether fast turns or fat margins actually earn more.

What this topic is

Inventory turnover is how many times a year a business sells through and replaces its stock — a measure of how fast the money tied up in inventory turns back into cash.

Why it matters

Every day stock sits unsold is cash frozen on a shelf. Faster turns free that cash, cut spoilage and obsolescence, and often out-earn a fatter margin that moves slowly.

Who should learn it

Retailers, e-commerce sellers, and anyone holding physical stock who wants to know how much to order and how their cash is really being used.

What you will understand

  • Calculate turnover and convert it to "days on the shelf"
  • See why turnover uses cost of goods sold, not revenue
  • Compare turnover across real retailers and understand the spread
  • Combine margin and turnover to find what truly earns the most

Prerequisites

Common misconception

"A higher margin always means more profit." A thin margin that turns twelve times a year can easily out-earn a fat margin that turns twice — profit on inventory is margin and turnover working together.