DIO Calculator
Days Inventory Outstanding (DIO) Calculator
How long does stock sit before it sells? Lower DIO means less cash tied up in inventory.
Current stock on hand
Annual direct costs
For benchmark comparison
Your Days Inventory Outstanding
—days
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Industry average
—
Inventory turns/year
—
Cash in excess stock
How This Calculator Works
DIO = (Inventory ÷ Cost of Goods Sold) × 365
Inventory Turnover = 365 ÷ DIO
Lower DIO is generally better but too low risks stockouts. Match DIO to your sales velocity and supply lead times.
This calculator is for educational purposes only and does not constitute financial advice. Consult a qualified accountant for guidance specific to your business.