Inventory Turnover Calculator

Turnover ratio and days inventory outstanding from COGS and average inventory.

What turnover tells you

Inventory turnover = COGS ÷ average inventory. Five turns a year means you sell and replace your entire stock five times. The inverse, multiplied by 365, is days inventory outstanding (DIO) — how long cash sits on a shelf before coming back.

The cash-flow consequence

Every extra turn frees working capital. On 100,000 of average inventory, moving from 4 turns to 6 releases roughly 33,000 of cash — which is often more than a year of profit improvement from margin work.

What is healthy depends on category

  • Apparel and fast fashion: 6–12 turns
  • Consumer electronics: 8–15 turns (obsolescence risk)
  • Furniture and bulky goods: 2–4 turns
  • Consumables: 12+ turns

Diagnosing a low number

Low turnover usually means over-ordering on a few SKUs, a long lead time forcing big buys, or a product that simply is not selling. Split the number by SKU before acting — the aggregate hides the culprit.

Frequently Asked Questions

Should I use average or ending inventory?

Average (start + end ÷ 2) smooths seasonality; ending inventory can flatter or distort the ratio.

What is a good turnover ratio?

It depends on category — compare within your niche, not against retail averages overall.

How does turnover affect cash?

Higher turnover means less cash tied up in stock, which funds growth without borrowing.

Assumptions & disclaimer

Results are estimates for planning. Fee schedules, tax brackets and deduction limits change; confirm current figures with the marketplace, the IRS or a qualified accountant before making decisions. Nothing here is financial, tax or legal advice.

Privacy & Your Data

BizCalcTool runs entirely in your browser. The figures you enter are never uploaded, stored or shared — there is no backend to send them to.