Days inventory outstanding (DIO)
How many days, on average, your stock takes to sell. It is inventory turnover expressed in days: the fewer, the sooner your stock turns into money.
Calculate it with your figures
It is calculated in your browser: nothing is sent or saved.
Enter your figures and you’ll see the result instantly.
How it is calculated
The formula
(Inventory ÷ Cost of sales) × days in the period
An example
| Current inventory | 30,000 € |
| Cost of sales for the current period | 170,000 € |
With figures from a year (360 days).
(€30,000 ÷ €170,000) × 360 = 64 days
It equals a turnover of 5.7 times per year: your stock is renewed that number of times (cost of sales ÷ inventory).
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Informational support tool; it does not constitute financial, accounting or tax advice.