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Inventory Turnover & Sell-Through Rate

Measure how efficiently you are managing your inventory. This calculator helps you determine how quickly stock is sold and how much is sold relative to what was available.

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Improve Cash Flow

Turn stale inventory into cash and optimize your buying decisions.

/ 02

Reduce Holding Costs

Avoid costs associated with storage, insurance, and obsolescence.

/ 03

Increase Sales

Identify popular products to ensure you meet customer demand.

The calculator

Run the numbers

Inventory Efficiency Calculator

Total cost of inventory sold during a period.

(Beginning Inventory + Ending Inventory) / 2

Total units available for sale at the beginning of the period.

Total units sold during the same period.

Results

Enter values and click Calculate to see results

The theory

Understanding Inventory Metrics.

Inventory turnover shows how many times a company has sold and replaced its inventory over a given period. Sell-through rate compares the amount of inventory received against what is actually sold.

/ Formula

This ratio shows how many times a company has sold and replaced its inventory during a given period. A higher turnover generally indicates strong sales.

Sell-Through Rate: Sell-Through Rate = (Units Sold / Stock on Hand at Start) × 100. It's a great measure of how well a specific product or product line is performing.

Inventory Turnover = COGS / Average Inventory
/ Industry standard

For retail, an inventory turnover ratio between 4 and 6 is often considered healthy. A sell-through rate above 80% is excellent, 40-80% is good, and below 40% may need improvement.

Questions, answered

Frequently asked questions.

A 'good' inventory turnover ratio varies by industry. For retail, a ratio between 4 and 6 is often considered healthy. A low ratio may indicate overstocking or poor sales, while a very high ratio might suggest under-stocking and potential for lost sales.
Inventory turnover provides a big-picture view of how efficiently you're managing all your inventory over a period (usually a year). Sell-through rate is more specific, typically measured for a particular product or category over a shorter period (like a month) to gauge its sales performance against the initial stock.
Tracking sell-through rate helps you understand customer demand for specific items. A high sell-through rate indicates a popular product that you should keep in stock. A low rate can signal that a product is overpriced, poorly marketed, or not what your customers want, helping you make decisions about discounting or discontinuing it.
To improve a low turnover rate, focus on increasing sales or reducing inventory. Strategies include: targeted marketing campaigns, sales promotions, bundling products, liquidating obsolete stock, and optimizing your purchasing to better match sales velocity.
Yes. While a high turnover is generally good, an excessively high ratio could mean you're not carrying enough inventory (under-stocking). This can lead to stockouts, missed sales opportunities, and an inability to meet customer demand, potentially damaging customer loyalty.
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