🧾financial accounting i review

Number of days’ sales in inventory ratio

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

The number of days' sales in inventory ratio measures the average number of days it takes for a company to sell its entire inventory during a specific period. It is a critical indicator of inventory management efficiency and liquidity.

5 Must Know Facts For Your Next Test

  1. The formula to calculate the number of days' sales in inventory is (Ending Inventory / Cost of Goods Sold) * 365.
  2. A lower number indicates faster turnover, which is usually better as it implies efficient inventory management.
  3. A high number can indicate overstocking or issues with selling products, leading to potential liquidity problems.
  4. This ratio helps businesses understand how well they are managing their stock levels relative to their sales volume.
  5. It is also known as the 'days inventory outstanding' (DIO) or 'inventory days on hand'.
2,589 studying →