About the Inventory Turnover Ratio
Inventory Turnover Ratio is a free financial statement calculator for efficiency analysis. Measures how often the average inventory stock is sold through over the period using cost of goods sold. Enter values from the source reports shown alongside each field and receive a calculated figure with contextual interpretation. The tool operates locally in your browser.
Formula or method
Formula: Cost of goods sold ÷ Average inventory. Find the required amounts on the reporting company’s Balance Sheet, Income Statement, Cash Flow Statement or supporting notes. Beginning and ending balance sheet amounts should cover the same period as the income statement numbers. Cost of goods sold / cost of revenue (Income Statement): Direct costs of goods or services sold during the period. Do not confuse this flow with the Inventory balance-sheet stock. Beginning inventory (Prior-period Balance Sheet): Inventory balance at the start of the period, not the purchases or expense amount. Ending inventory (Current Balance Sheet): Inventory balance at the end of the period. Use the same measurement conventions as opening inventory.
Worked example
Illustrative example inputs: Cost of goods sold / cost of revenue = 180,000; Beginning inventory = 25,000; Ending inventory = 35,000. Replace these sample figures with values from your financial statements to see the calculation. Use consistent units and period lengths; numbers in thousands and millions cannot be combined without conversion.
How to use the tool
- Locate the named accounts on the financial statements and read the accompanying footnotes.
- Enter each amount using one currency, scale and consistent reporting dates or reporting period.
- Read the value together with its low, high and negative interpretation. Compare with past years and industry peers.
Common uses
Financial statement review, small business monitoring, credit analysis, investor education.
Assumptions and limitations
A zero inventory balance makes turnover undefined; this metric is often not useful for service-only firms. Low turnover may indicate slow-moving stock, overstocks or seasonality; investigate product type. Higher turnover can signal efficient stock management, but too high may also lead to lost sales through stockouts. Never decide whether a business is healthy from a single ratio alone. Sector norms, revenue recognition, reporting periods, one-time items and the cash-flow statement all matter.
Frequently asked questions
What does a inventory turnover ratio result mean?
Measures how often the average inventory stock is sold through over the period using cost of goods sold. Low turnover may indicate slow-moving stock, overstocks or seasonality; investigate product type. Higher turnover can signal efficient stock management, but too high may also lead to lost sales through stockouts. If a denominator is zero, or book equity is nonpositive for ratios that depend on it, treat the result as undefined rather than zero.
Where to find the numbers on your financial statements
Use amounts from the same business, in the same currency and reporting period. Balance Sheet figures are amounts at particular dates; Income Statement and Cash Flow Statement figures cover a period.
Cost of goods sold / cost of revenue
Source: Income Statement
Direct costs of goods or services sold during the period. Do not confuse this flow with the Inventory balance-sheet stock.
Beginning inventory
Source: Prior-period Balance Sheet
Inventory balance at the start of the period, not the purchases or expense amount.
Ending inventory
Source: Current Balance Sheet
Inventory balance at the end of the period. Use the same measurement conventions as opening inventory.
What does the ratio tell you?
Measures how often the average inventory stock is sold through over the period using cost of goods sold.
How to read a lower result
Low turnover may indicate slow-moving stock, overstocks or seasonality; investigate product type.
How to read a higher result
Higher turnover can signal efficient stock management, but too high may also lead to lost sales through stockouts.
What if the ratio is negative, zero or undefined?
A zero inventory balance makes turnover undefined; this metric is often not useful for service-only firms. A zero denominator is mathematically undefined. Assess profitability, cash generation and balance-sheet quality together.
Calculate the ratio using the formula
Cost of goods sold ÷ Average inventory
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