GMROI Calculator
Calculate gross margin return on investment (GMROI) from gross margin and average inventory cost to measure inventory profitability.
Last reviewed by the Radiatus Cloud team
Calculate GMROI, how many gross-margin dollars you earn per dollar of inventory.
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Calculate GMROI
Gross margin return on investment, or GMROI, measures how many gross-margin dollars a retailer earns for every dollar invested in inventory. It is calculated by dividing the annual gross margin by the average inventory cost. A GMROI of one and a half means the business generates one dollar fifty of gross margin for each dollar tied up in stock. A GMROI above one indicates the inventory is generating more margin than its cost, while a figure below one means the inventory is losing money.
GMROI combines profitability and inventory efficiency into a single ratio, which is why retailers rely on it so heavily.
Managing inventory with GMROI
GMROI is one of the most important metrics in retail and wholesale because it links margin with how hard inventory is working. Two products can have the same margin, but the one that sells through faster, requiring less average inventory, delivers a much higher GMROI. This helps buyers decide which products deserve more shelf space and investment and which are tying up capital unprofitably.
Because it uses average inventory at cost, GMROI is best tracked by product category and compared over time and against benchmarks. Raising it means improving margin, increasing turnover, or reducing the inventory held. All calculation happens locally in your browser.
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Frequently Asked Questions
What is the GMROI formula?
GMROI equals the annual gross margin divided by the average inventory cost, showing gross-margin dollars earned per dollar of inventory.
What is a good GMROI?
Any figure above one means inventory earns more margin than it costs. Many retailers target well above one, with norms varying by category.
How is GMROI different from gross margin?
Gross margin measures profitability per sale, while GMROI also factors in how much inventory is required, rewarding faster-selling stock.
How can I improve GMROI?
Raise margins, increase inventory turnover so less stock is held, or cut slow-moving inventory that ties up capital.
Why use average inventory cost?
Inventory levels fluctuate, so the average over the period gives a fair measure of the capital invested in stock.
Privacy & Security
Everything runs in your browser; nothing is uploaded.
How to Use
Enter gross margin dollars and average inventory cost.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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