Inventory-to-Sales Ratio Calculator

See how much inventory you carry per unit of sales. Enter your own figures, no account needed.

By Tibeau De Grauwe, FounderUpdated September 2026

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The inventory-to-sales ratio compares the value of the stock you hold with the sales it supports. Retailers and distributors use it to check whether stock levels are keeping pace with revenue.

Enter your average inventory value (for example the mean of month-end values) and net sales for the same period. Use the same currency and the same period for both.

Compare the result with your own history and your sector, not with other industries: grocery runs far leaner than furniture or spare parts.

Inventory-to-Sales Ratio Calculator

Inventory-to-sales ratio

0.17

16.67 %

How the calculation works

Inventory-to-sales ratio = average inventory value ÷ net sales.

Example: €150,000 average inventory and €900,000 net sales gives 150,000 ÷ 900,000 = 0.17, meaning about 17 cents of stock for every euro of sales.

Because sales include your margin while inventory is valued at cost, this ratio is not the inverse of turnover. Use the inventory turnover calculator if you need the cost-based view.

See also: Inventory turnover calculator, Stock Cover Calculator.

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Frequently asked questions

How do you calculate the inventory-to-sales ratio?
Divide average inventory value by net sales over the same period. Multiply by 100 to express it as a percentage.
What is a good inventory-to-sales ratio?
It depends heavily on the sector and the season. Track your own ratio over time and investigate when it climbs faster than sales.
How is it different from inventory turnover?
Turnover divides cost of goods sold by average inventory. The inventory-to-sales ratio divides average inventory by sales, so it mixes cost and price and should be compared like for like.
Does this calculator store my data?
No. The calculation runs entirely in your browser; nothing is sent to or stored on a server.

Topic guide

Inventory Management Software

Part of our complete guide. Start with inventory management software.

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