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Calculate annual inventory turnover ratios, Days Sales of Inventory (DSI/DIO), average stock value, and holding cost velocity.
📦 Operations Insight: Reducing shelf dwell time from 91 days to 68 days would unlock approximately $12,500 in liquid cash flow.
Because stock fluctuates throughout the year with seasonality and purchase orders, average inventory smooths the baseline:
For $45,000 beginning and $55,000 ending: ($45,000 + $55,000) ÷ 2 = $50,000 Average Inventory.
Divide annual Cost of Goods Sold (COGS) by the calculated average inventory value:
$200,000 COGS ÷ $50,000 = 4.00 Turns per Year.
DIO measures how many calendar days products sit in storage before reaching customers:
365 ÷ 4.00 = 91.25 Days.
Inventory Turnover & Days Sales of Inventory Calculator. Calculate inventory turnover ratio, average days to sell inventory (DSI), and stock velocity from COGS and inventory data. ZechKit provides this tool completely free and online, optimized for instant, accurate computations directly inside your web browser.
An Inventory Turnover Calculator measures how efficiently a business manages its stock by tracking how many times inventory is sold and replaced over a period.
Formulas: Average Inventory = (Beginning Inventory + Ending Inventory) / 2. Inventory Turnover Ratio = Cost of Goods Sold (COGS) / Average Inventory. Days Sales of Inventory (DSI) = 365 / Inventory Turnover Ratio.
Interpreting Turnover Metrics: A high turnover ratio indicates strong sales velocity and efficient capital use; a low turnover ratio may signal overstocking, obsolete inventory, or sluggish demand.
Working Capital Optimization: Faster inventory turns free up operating cash flow and reduce warehouse holding costs, spoilage, and storage fees.
What is the formula for the Inventory Turnover Ratio?
Inventory Turnover Ratio = Cost of Goods Sold (COGS) / Average Inventory for the designated period.
