Inventory Turnover Calculator
Find out how many times your business sells and replaces its inventory within a period. Use this when evaluating stock efficiency, comparing suppliers, or spotting overstocking issues.
About this calculator
Inventory turnover measures how frequently a company sells through its average stock of goods in a given period, typically a year. The formula is: Inventory Turnover = COGS / Average Inventory. COGS (Cost of Goods Sold) represents the direct costs of producing goods sold during the period. Average Inventory is usually calculated as (Beginning Inventory + Ending Inventory) / 2. A high ratio indicates efficient stock management and strong sales, while a low ratio suggests overstocking or sluggish demand. Industry benchmarks vary widely — grocery retailers may exceed 20 turns per year, while luxury goods sellers might see fewer than 2. Tracking this ratio over time helps businesses optimize purchasing decisions and reduce carrying costs.
How to use
Suppose a retailer has a COGS of $500,000 for the year and an average inventory value of $125,000. Apply the formula: Inventory Turnover = COGS / Average Inventory = $500,000 / $125,000 = 4. This means the company sold and restocked its entire inventory 4 times during the year, or roughly once every 91 days. Enter $500,000 in the Cost of Goods Sold field and $125,000 in the Average Inventory Value field to confirm this result instantly.
Frequently asked questions
What is a good inventory turnover ratio for retail businesses?
A good inventory turnover ratio depends heavily on the industry. For general retail, a ratio between 4 and 6 is often considered healthy, meaning stock is replaced every 2–3 months. Grocery and fast-moving consumer goods companies typically target ratios above 10 or even 20. Luxury goods or specialty retailers may operate effectively with ratios below 2, since their products are slower-moving but higher-margin. Always compare your ratio against industry peers rather than a universal standard.
How does inventory turnover ratio affect cash flow?
A higher inventory turnover ratio means your capital is tied up in stock for shorter periods, which frees up cash more quickly. When goods move fast, you replenish inventory frequently but avoid the costs of holding excess stock such as warehousing, insurance, and spoilage. A low turnover ratio can create cash flow problems because money is locked in unsold goods. Businesses with slow turnover may need to discount products or renegotiate supplier terms to improve liquidity.
What is the difference between inventory turnover and days sales of inventory?
Inventory turnover tells you how many times stock is sold and replaced in a period, while Days Sales of Inventory (DSI) converts that into the average number of days it takes to sell through inventory. DSI is calculated as 365 / Inventory Turnover. For example, a turnover ratio of 4 equals a DSI of about 91 days. Both metrics provide the same underlying insight but DSI is often more intuitive for operational planning and supplier negotiations.