Inventory Days

Inventory days with turns.

Days inventory outstanding ≈ (inventory ÷ COGS) × 365. Also shows turns per year so stock speed is clear next to the balance.

What Inventory Days does

Days inventory outstanding ≈ (inventory ÷ COGS) × 365. Also shows turns per year so stock speed is clear next to the balance.

Inventory Days sits in the Finance group on purpose. It is not Inventory Turnover (Inventory turns with days on hand.) and not Days Sales Outstanding (DSO with turnover.). Choose this page when you need Inventory days with turns. If you stretch Inventory Days into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Inventory Days

  1. Confirm you need Inventory Days, not Inventory Turnover (Inventory turns with days on hand.). Address: /finance/inventory-days.
  2. Enter the numbers or dates Inventory Days uses. Inventory days with turns.
  3. Read the result as Inventory Days defines it — not as Days Sales Outstanding (DSO with turnover.). Days inventory outstanding ≈ (inventory ÷ COGS) × 365. Also shows turns per year so stock speed is clear next to the balance.
  4. Inventory Days is an estimate in the browser, not professional advice. COGS >0.
  5. Need a different formula? Try Days Sales Outstanding (DSO with turnover.) instead of stretching Inventory Days.

When not to use Inventory Days

Skip Inventory Days when a neighbor tool matches better — start with Inventory Turnover or Days Sales Outstanding — or when the description already warns the job will fail. In the tool’s own words: Days inventory outstanding ≈ (inventory ÷ COGS) × 365. Also shows turns per year so stock speed is clear next to the balance.

Questions about Inventory Days

What does Inventory Days do that other Finance pages on this site do not?
Days inventory outstanding ≈ (inventory ÷ COGS) × 365. Also shows turns per year so stock speed is clear next to the balance. Short version: Inventory days with turns.
Does Inventory Days upload my file or text to Tool-You servers?
No. Inventory Days runs in this browser tab. Files stay on the device. Limit note: COGS >0.
Should I use Inventory Turnover instead of Inventory Days?
Use Inventory Days when you need Inventory days with turns. Use Inventory Turnover when you need Inventory turns with days on hand. They share a category (Finance) but not the same job.
What are the limits of Inventory Days?
COGS >0. Also: Days inventory outstanding ≈ (inventory ÷ COGS) × 365. Also shows turns per year so stock speed is clear next to the balance.