Gross Margin ROI Calculator
GMROI: gross profit earned per dollar of inventory.
Enter your values
Enter the annual sales in $.
Enter the cogs in $.
Enter the average inventory at cost in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- GMROI
- 2.21
- Gross profit
- $210,000.00
- Gross margin
- 35%
- Inventory turns
- 4.11x
Quick answer
GMROI is annual gross profit divided by average inventory at cost. Above 1 means inventory earns more than it costs.
GMROI = gross profit / average inventory cost
At a glance
| What it does | GMROI: gross profit earned per dollar of inventory. |
|---|---|
| Category | Business |
| Inputs needed | Annual sales, COGS, Average inventory at cost |
| Main output | GMROI |
| Formula | GMROI = gross profit / average inventory cost |
| Cost | Free — no sign-up, no download |
How to use the Gross Margin ROI Calculator
- 1Enter annual sales and cost of goods sold.
- 2Enter the average value of inventory held at cost.
- 3Aim above 2.0 in most retail categories.
Inputs explained
- Annual sales($)
- Enter the annual sales in $.
- COGS($)
- Enter the cogs in $.
- Average inventory at cost($)
- Enter the average inventory at cost in $.
Worked example
Using the values the calculator loads with:
Inputs
- Annual sales600000 $
- COGS390000 $
- Average inventory at cost95000 $
Results
- GMROI2.21
- Gross profit$210,000.00
- Gross margin35%
- Inventory turns4.11x
Frequently asked questions
Why not just use margin?
Margin ignores how much cash is parked in stock; GMROI captures both.
How do I raise GMROI?
Increase turns, trim slow lines, or negotiate better cost prices.
What do I need to enter into the Gross Margin ROI Calculator?
Just 3 values: annual sales, cogs, average inventory at cost. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Gross Margin ROI Calculator work out the answer?
GMROI is annual gross profit divided by average inventory at cost. Above 1 means inventory earns more than it costs. It applies the formula GMROI = gross profit / average inventory cost and shows the working so you can check each step by hand.
Is the Gross Margin ROI Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.