Inventory days Calculator

How to calculate inventory days

This tool calculates inventory days from Average inventory, Cost of goods sold, Period length (days). Enter each quantity in its labelled field, then use the formula below to check the calculation.

Formula

inventory ÷ cost of goods sold × period days

Worked example

Average inventory

10,000

Cost of goods sold

50,000

Period length (days)

365

Applying the formula to these values gives 73 days.

What should I check?

Explore loan repayment estimates, interest, profit margins, pricing and business costs. Enter your own rates and costs; these tools provide arithmetic estimates rather than financial advice.

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