Days Inventory Outstanding (DIO) Calculator

Days Inventory outstanding (DIO) is the average number days that a company needs to sell all its inventory. Calculate Days Inventory Outstanding (DIO) using our easy to use simple Days Inventory Outstanding Formula & Calculator.

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Days Inventory Outstanding (DIO) Calculator Details


Learn what is days inventory outstanding and how to calculate days inventory outstanding? DIO is key metrics to determine how easily company can sell its products and to analyze company’s inventory efficiency.

What is Days Inventory Outstanding (DIO)?

Days Inventory outstanding (DIO) is the average number days that a company needs to sell all its inventory. In simple words DIO measures how quickly a company can turn its inventory into sales.

Days Inventory Outstanding Formula

Days Inventory Outstanding (DIO) = (Average inventory / Cost of sales) x Number of days in period

Average inventory = (Beginning inventory + Ending inventory)

A low days inventory outstanding means that a company can more quickly turn its inventory into sales.

A high days inventory outstanding means that company not able to convert its inventory into sales quickly.

How to calculate days inventory outstanding?

Days inventory outstanding (DIO) can be easily calculated by following the below steps

1. Calculate Average Inventory

Average inventory is the sum of beginning inventory and ending inventory divided by 2.

Average inventory = (Beginning inventory + Ending inventory)

2. Find out cost of goods sold and company’s accounting period

Company accounting period is typically a fiscal year which is 365 days

3. Calculate DIO using DIO formula

Days Inventory Outstanding (DIO) = (Average inventory / Cost of sales) x Number of days in period