Accounting Inventory Turnover Calculator
Calculate inventory turnover, average inventory, and days inventory outstanding from cost of goods sold and inventory balances.
Overview
This Accounting Inventory Turnover Calculator estimates how often inventory is sold and replaced over a reporting period. Enter cost of goods sold along with beginning and ending inventory balances to calculate average inventory, turnover, and the average number of days stock is held.
How it works
The calculator first finds average inventory by adding beginning and ending inventory and dividing by two. It then divides cost of goods sold by average inventory to calculate the inventory turnover ratio. Finally, it divides the number of days in the period by turnover to estimate days inventory outstanding. A higher turnover can indicate faster inventory movement, but the most useful comparison is usually against prior periods or comparable businesses.
How to use this calculator
- 1Enter cost of goods sold for the reporting period.
- 2Enter the inventory value at the beginning of the period.
- 3Enter the inventory value at the end of the same period.
- 4Set the number of days in the reporting period.
- 5Review the turnover ratio and days inventory outstanding.
Example Calculation
Cost of Goods Sold
$500,000
Beginning Inventory
$100,000
Ending Inventory
$150,000
Days in Accounting Period
365
Inventory Turnover Ratio
4.00 times
Average inventory is $125,000. Inventory turnover is 4.00 times per year, and average inventory is held for about 91.3 days.
Frequently asked questions
What is inventory turnover?
Inventory turnover is the number of times a business sells and replaces its average inventory during a reporting period. It is commonly calculated as cost of goods sold divided by average inventory.
Why use average inventory instead of ending inventory?
Average inventory uses both the beginning and ending balances, which can provide a more representative basis than relying on one point-in-time balance alone.
What does a high inventory turnover ratio mean?
A high ratio generally means inventory moves more frequently. Whether that is desirable depends on margins, product availability, stockouts, seasonality, and the business model.
What is days inventory outstanding?
Days inventory outstanding, also called days sales of inventory, estimates the average number of days inventory is held before being sold.
Should I use sales revenue or cost of goods sold for inventory turnover?
Cost of goods sold is generally used because inventory is normally recorded at cost. Using sales revenue can produce a ratio that is not directly comparable to inventory values.
How often should inventory turnover be calculated?
Many businesses calculate it monthly, quarterly, and annually. Using the same period length and inventory valuation approach makes trends easier to compare.
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Assumptions and warnings
Assumptions
- Cost of goods sold, beginning inventory, and ending inventory are measured consistently using the same inventory valuation method.
- Beginning and ending balances reasonably represent inventory levels throughout the accounting period.
- The calculation uses cost of goods sold rather than sales revenue.
- Results are estimates that should be reviewed alongside seasonality, stock mix, and business operating conditions.
Warnings
- This calculator provides a general accounting estimate and is not accounting, tax, or financial advice.
- Compare turnover figures with similar businesses and periods using consistent accounting methods.