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Days Inventory Outstanding (DIO)

Calculate Days Inventory Outstanding (DIO) instantly with the exact formula and a worked example.

Days Inventory Outstanding (DIO)

Avg inventory
COGS/year
DIO
36.5days
Calculate Days Inventory Outstanding (DIO) instantly with the exact formula and a worked example.

More about: Days Inventory Outstanding (DIO)

What it calculates

The “Days Inventory Outstanding (DIO)” calculator computes DIO in days from 2 parameters: avg inventory, cogs/year.

Applied in business management, unit economics, and financial modeling.

Example calculation

With parameters Avg inventory = 200,000, COGS/year = 2,000,000 the result is 36.5 days.

How to use

  1. Enter avg inventory and cogs/year — each field above is adjustable with a slider.
  2. DIO (days) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Days Inventory Outstanding (DIO) calculated?
The Days Inventory Outstanding (DIO) calculator computes DIO (in days) from avg inventory, cogs/year. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Days Inventory Outstanding (DIO) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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