Inventory Turnover Calculator
Calculate Inventory Turnover metrics for ecommerce, SaaS, marketing, and operations.
This inventory turnover calculator finds how many times a business sells through and replaces its inventory over a given period, a key efficiency metric for balancing enough stock to meet demand against tying up excess cash in unsold goods.
Enter your cost of goods sold and average inventory value, and the calculator returns your inventory turnover ratio.
Worked Calculation Examples
| Scenario | Result | Calculation Step |
|---|---|---|
| $600,000 COGS, $100,000 average inventory | Turnover = 6 | Turnover = 600,000 ÷ 100,000 = 6 - inventory sold and replaced about 6 times over the period, or roughly every 61 days (365 ÷ 6). |
| $240,000 COGS, $80,000 average inventory | Turnover = 3 | Turnover = 240,000 ÷ 80,000 = 3 - slower-moving inventory than the first example, or roughly every 122 days (365 ÷ 3). |
The Inventory Turnover Formula
Inventory turnover = cost of goods sold (COGS) / average inventory value, over the same period. A turnover ratio of 6 means inventory was sold and replaced about 6 times during that period - dividing 365 days by the turnover ratio also gives average days to sell through inventory.
Balancing High and Low Turnover
Higher turnover generally indicates efficient inventory management and strong sales relative to stock held, but excessively high turnover can also signal insufficient stock levels leading to stockouts. Low turnover ties up cash in unsold inventory and increases holding costs and obsolescence risk - the right turnover target varies significantly by industry and product type.
How to Use the Inventory Turnover Calculator
- Open the Inventory Turnover Calculator and enter the values requested in the input fields.
- Check the units, percentages, dates, or time periods before reading the answer.
- Review the instant result and adjust any value to compare another scenario.
- Use the formula, example, and FAQs below to understand how the inventory turnover calculator works.
Frequently Asked Questions
How do you calculate inventory turnover?
Divide cost of goods sold by average inventory value over the same period: turnover = COGS / average inventory.
What is a good inventory turnover ratio?
It varies significantly by industry - perishable goods retailers often see turnover well above 10, while some durable goods businesses operate efficiently with much lower ratios, so comparing against industry peers is more useful than a universal target.
What does low inventory turnover indicate?
Low turnover can suggest overstocking, weak sales relative to inventory levels, or slow-moving products - all of which tie up cash and increase holding and obsolescence costs.
How do I use this inventory turnover calculator?
Enter the known values, review the units or settings, and the calculator updates the result instantly. The formula and example on this page show how the answer is produced.
What does the Inventory Turnover Calculator calculate?
Calculate Inventory Turnover metrics for ecommerce, SaaS, marketing, and operations. It is designed for fast browser-based calculations without sign-up, downloads, or manual spreadsheet setup.
What formula does this inventory turnover use?
The formula is: Turnover = COGS ÷ Average Inventory Value. Inventory turnover analysis grew out of early 20th-century scientific management and operations research, formalized as manufacturers and retailers sought quantitative ways to balance the cost of holding excess inventory against the risk of stockouts - a foundational trade-off in what later became the broader academic and professional discipline of supply chain management.
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Last updated: September 27, 2026.