Cash flow & operations
How fast does inventory turn into sales?
An inventory turnover calculator: owners enter annual cost of goods sold and average inventory to see turnover and days of inventory on hand.
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How do you calculate inventory turnover?
Divide annual cost of goods sold by average inventory value. $600,000 of COGS on $100,000 of average inventory is a turnover of 6, meaning stock is replaced six times a year, about every 61 days. Faster turnover frees cash; too fast can mean stockouts.
After year-end inventory counts
Year-end counts and tight cash flow make owners look at stock. Retailers, distributors and manufacturers want to know whether they're holding too much.
What the client types into a search box
“is my inventory turnover good”
How a client works through it
Enter annual COGS
Cost of goods sold for the year.
Enter average inventory
Average of beginning and ending inventory, or monthly averages.
See turnover
Times per year.
See days on hand
Average days inventory sits.
What lands in your inbox
When a client asks your firm to review the result, the request arrives as a contact record with their inputs and results attached, by email and, on paid plans, by webhook to your CRM.
Received
COGS and average inventory show the scale and efficiency. Low turnover suggests cash tied up in slow stock; very high turnover may indicate stockout risk.
Turnover and days on hand
Inventory Turnover shows how many times stock is sold and replaced. Days Inventory on Hand converts it to days. Average Inventory confirms the input.
Compare with industry norms and with your own history.
Results shown: Inventory Turnover · Days Inventory on Hand · Average Inventory.
Six turns a year
$600,000 COGS ÷ $100,000 average inventory = 6 turns. 365 ÷ 6 ≈ 61 days on hand.
Why inventory analysis suits product businesses' advisers
Inventory is often the biggest use of cash in a product business. Bookkeepers and CPAs who help owners understand turnover can free cash and improve margins.
It also connects to inventory accounting and tax questions at year-end.
Follow-ups this request opens
- Identify slow-moving stock
- Set reorder points and targets
- Review inventory accounting methods
- Free up cash tied in inventory
What this calculator leaves out
- Annual figures; seasonal businesses should check by period.
- Average inventory as entered.
- No product-level detail.
- No carrying-cost estimate.
Platform disclaimer shown under the calculator: Estimates only. Uses annual cost of goods sold and average inventory; seasonal businesses should review period-by-period figures.
Compliance note for firms
Inventory metrics are management tools. Inventory valuation for tax and financial reporting follows specific rules that the firm should apply separately.
Not legal advice. See our disclaimer and the guide to compliance for client calculators.
Terms your client sees in the calculator
These definitions appear in the calculator's collapsible Definitions block, so clients don't have to call to ask what a label means.
- Inventory turnover
- How many times a business sells through and replaces its average inventory in a year: annual cost of goods sold divided by average inventory at cost. $600,000 of COGS on $100,000 of average inventory is a turnover of 6x. Higher usually means leaner stock, but what counts as good varies widely by industry.
- Days inventory on hand
- The average number of days inventory sits before it is sold, calculated here as 365 divided by inventory turnover. A turnover of 6x means about 61 days on hand. Fewer days frees up cash and reduces spoilage and obsolescence risk; too few can lead to stockouts. Also called days inventory outstanding (DIO).
- Cost of goods sold (COGS)
- The direct cost of the products a business sold during the period — purchase cost or materials, direct labor and inbound freight — not selling or overhead expenses. Turnover uses COGS rather than sales revenue so that both sides of the ratio are measured at cost and markup does not inflate the result.
- Average inventory
- The typical value of stock held during the year, at cost, usually calculated as beginning inventory plus ending inventory divided by 2. For seasonal businesses, two points in time can mislead; averaging month-end balances gives a more representative figure for this calculation.
- Carrying costs
- The ongoing cost of holding inventory: storage space, insurance, handling, shrinkage, obsolescence and the capital tied up in stock. They are why higher turnover generally improves profitability — each dollar of inventory held for fewer days incurs less carrying cost. They are not part of this calculation but explain why it matters.
- Stockout
- Running out of an item customers want to buy. Pushing inventory too low to raise turnover increases the chance of stockouts, which cost lost sales and can send customers elsewhere. A healthy turnover balances the carrying cost of excess stock against the risk of not having it.
Inventory Analysis calculator: questions from firms and clients
What's a good turnover?
It depends on the industry; grocery turns fast, furniture slowly.
How do I find average inventory?
Average the beginning and ending balances, or monthly figures.
Why use COGS, not sales?
Because inventory is valued at cost.
Can turnover be too high?
Yes, if it causes stockouts.
Does it help with cash flow?
Yes, lower inventory frees cash.
What about seasonal stock?
Use period averages.
Is it useful for service businesses?
Not usually.
Which plan includes it?
Network. See pricing.
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