Days Inventory Outstanding (DIO
Days Inventory Outstanding (DIO) measures the average number of days a company holds inventory before converting it into sales.
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📐 Formula
💡 Practical Example
$50,000 Average Inventory with $300,000 annual COGS (365 days): DIO = × 365 = 60.8 Days. Inventory Turnover Ratio = $300,000 / $50,000 = 6.00 turns per year.
📖 About Days Inventory Outstanding (DIO
Days Inventory Outstanding (DIO) measures the average number of days a company holds inventory before converting it into sales. Lower DIO values reflect superior inventory turnover and reduced capital tie-up.
To use the Days Inventory Outstanding (DIO) & Inventory Turnover Calculator, enter your Average Inventory Value, Cost of Goods Sold (COGS), Measurement Horizon Period. The calculator instantly computes Days Inventory Outstanding (DIO), Inventory Turnover Ratio and more. Results update in real time as you change any input — no submit button needed.
How to Use This Calculator
Enter your Average Inventory Value (e.g. 50000 in ), Cost of Goods Sold (COGS) (e.g. 300000 in /yr), and Measurement Horizon Period — choose from Annual (365 Days), Quarterly (90 Days). Results update instantly as you type — adjust any value to compare scenarios.
The Formula
Days Inventory Outstanding (DIO) = (Average Inventory ÷ COGS) × Measurement Days
Inventory Turnover Ratio = COGS ÷ Average Inventory
Worked Example
50,000 Average Inventory with 300,000 annual COGS (365 days):
DIO = 365 = 60.8 Days.
Inventory Turnover Ratio = 300,000 / 50,000 = 6.00 turns per year.
Understanding Your Result
Evaluate your result in the context of your specific use case and relevant industry standards or reference values. A single calculated result is a starting point — test two to three scenarios to understand how sensitive the outcome is to your key input assumptions. For high-stakes decisions, verify your result against a secondary source or subject-matter expert before acting.
💡 Mathematical Rigor & Applied Context
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