DIO Calculator - Days Inventory Outstanding

Your details

Average inventory is the most common method. Use ending inventory when only a single balance is available. Use the turnover method when you already know the inventory turnover ratio.
The value of inventory at the start of the period (e.g. the opening balance from your balance sheet).
USD
The value of inventory at the end of the period (e.g. the closing balance from your balance sheet).
USD
Total cost of goods sold for the period, taken from your income statement.
USD
Use 365 for annual, 90 or 91 for quarterly, or any custom period length.
days
Days Inventory OutstandingEfficient
35.1days

Average number of days inventory is held before being sold

Average inventory625,000USD
Inventory turnover10.4x
Daily COGS17,808USD/day
35.1 days
Very fast<30Efficient30-60Moderate60-100Slow100+

Your DIO is 35.1 days.

  • Your DIO is in an efficient range for most industries, indicating solid inventory management and steady sales velocity.
  • Your inventory turns over approximately 10.4 times per period. Higher turnover generally signals stronger demand and leaner working capital needs.
  • You spend roughly $17,808 on cost of goods per day, so each day of DIO reduction releases that amount of working capital.
  • DIO is most meaningful when compared to the same company over time or against direct industry peers - cross-industry comparisons can mislead.

Next stepTo see the full cash conversion picture, pair DIO with Days Sales Outstanding (DSO) and Days Payable Outstanding (DPO): CCC = DIO + DSO - DPO.

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