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How many days of inventory do you have?

Days of inventory = (average inventory value ÷ cost of goods sold) × number of days in the period.

Average inventory value ($)

Cost of goods sold for the period ($)

Period length (days)

Calculate

Example: $20,000 average inventory and $120,000 annual COGS → (20000÷120000)×365 ≈ 61 days of inventory.