Inventory Turnover Ratio Calculator

Measure your e-commerce store's inventory efficiency with our free calculator. Input your COGS and inventory values to find your Inventory Turnover Ratio and Average Days of Inventory on Hand.

5/5 on Shopify/500+ brands trust us
Decathlon
From Future
Fincut
Mushngo
Wanimo
Arntreal
Bliss
Lao Care
Decathlon
From Future
Fincut
Mushngo
Wanimo
Arntreal
Bliss
Lao Care
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Example and tips

A store with $240,000 in annual cost of goods sold and an average inventory valued at $48,000 has a turnover ratio of 5. That means stock cycles five times a year, or roughly 73 days of inventory sitting on the shelf before it sells.

  • For most DTC brands, a ratio of 4 to 6 is healthy. Under 2 means cash is frozen in slow stock.
  • A ratio above 10 looks efficient but often signals stockouts. Check lost-sale reports before celebrating it.
  • Compute turnover per SKU, not store-wide. The average hides the dead stock you should be discounting now.
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How it works

How our inventory turnover ratio calculator works?

Measure your e-commerce store's inventory efficiency with our free calculator. Input your COGS and inventory values to find your Inventory Turnover Ratio and Average Days of Inventory on Hand.

1

1) Input your financial data

Provide your total Cost of Goods Sold (COGS) for a period, along with the value of your inventory at the beginning and end of that same period.

2

2) Let the tool do the math

Our calculator instantly computes your average inventory value and then uses it to determine your inventory turnover ratio for the period.

3

3) Understand your inventory health

Get your turnover ratio and the average number of days it takes to sell your stock. Use this insight to optimize your purchasing and sales strategy.

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Inventory Turnover Ratio Calculator: Free Tool for Shopify 2026 | Kanal