Resale GMROI Calculator
Compare the gross profit a resale category produces with the inventory cash tied up during the same period.
Resale GMROI Calculator estimate
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How the estimate works
Gross profit equals sales revenue minus cost of goods sold. GMROI divides that gross profit by average inventory at cost, calculated from the beginning and ending inventory values.
Worked example
Example: $60,000 of sales minus $36,000 of cost of goods sold leaves $24,000 of gross profit. With $15,000 of average inventory at cost, a GMROI of 1.60 means this scenario produces $1.60 of gross profit for each $1.00 of average inventory.
Method source
Shopify's GMROI formula and inventory-cost guidance. The source supports the formula and cost-basis convention; your inputs determine this estimate.
Important limitation
Use sales, cost of goods sold, and inventory from the same reporting period and the same cost basis. Two endpoint balances can miss seasonal peaks, and gross profit does not include every operating expense. Results are estimates only and are not financial, lending, legal, tax, or investment advice.
Assumptions and review
Formula review: September 24, 2026. This tool uses only the editable values shown above and does not pull live rates, prices, balances, or account data.
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Frequently asked questions
How does the resale gmroi calculator work?
Gross profit equals sales revenue minus cost of goods sold. GMROI divides that gross profit by average inventory at cost, calculated from the beginning and ending inventory values.
Is this resale gmroi calculator exact?
No. It is a planning estimate based on the values you enter. Actual rates, fees, timing, taxes, and provider rules can change the result.
Can I change the assumptions?
Yes. Every displayed input is editable so you can compare scenarios instead of relying on a hidden default.