Free jewelry business calculators
Two quick tools jewelers actually use—figure out your GMROI (how hard your inventory is working) and your markup, margin, and retail price. No sign-up; everything runs right in your browser.
Jewelry GMROI calculator
GMROI—gross margin return on investment—tells you how much gross margin you earn for every dollar tied up in inventory. It's the number that separates stock that pays its way from stock that just sits.
Roughly (beginning + ending inventory) ÷ 2, valued at cost.
Your GMROI
—
Enter your sales and average inventory to see the result.
- Gross margin
- —
- Margin %
- —
- Inventory turns
- —
How to read it: a GMROI above 1.0 means each inventory dollar returns more than its cost in gross margin. Jewelry runs on high margins but slow turns, so track GMROI over time and by category—it's the fastest way to spot the cases and vendors quietly dragging down your return.
Jewelry markup & margin calculator
Enter a piece's cost and your markup to get the retail price, profit, and—crucially—the true margin. Start from keystone (2×) or set your own.
Retail price
—
- Profit
- —
- Markup %
- 100.0%
- Margin %
- 50.0%
Markup vs. margin: markup is measured against cost; margin against the selling price. Keystone (2×) is a 100% markup but only a 50% margin—the single most common mix-up in jewelry pricing, and the reason a piece can look profitable on markup and come up short on margin.
Stop calculating it by hand
These numbers are only useful if they're current—and doing them on a spreadsheet means they never quite are. BusinessMind tracks cost, margin, and inventory performance on every piece automatically, so GMROI and true margin are live, not a quarterly guess. See how it works in jewelry inventory management, or take in the full platform.
Inventory best practices → How jewelers source inventory → View pricing →
Frequently asked questions
What is a good GMROI for a jewelry store?
GMROI above 1.0 means every dollar tied up in inventory returns more than a dollar in gross margin. Because jewelry carries high margins but turns slowly, healthy stores often land well above 1.0—but the right target depends on your mix. Track it over time and by category rather than chasing a single number.
What is the difference between markup and margin?
Markup is measured against your cost; margin is measured against your selling price. Keystone pricing—doubling cost—is a 100% markup but only a 50% margin. They are easy to confuse, which is exactly why a piece can look profitable on markup and disappoint on margin.
What is keystone pricing?
Keystone means setting retail at twice your cost (a 2× multiplier). It is the classic jewelry starting point—100% markup, 50% margin—though many pieces are priced above keystone (2.5×, triple key) depending on brand, exclusivity, and demand.
Do I need an account to use these calculators?
No. Both tools run entirely in your browser—nothing is saved or sent anywhere. They are free to use.
Numbers like these, always current.
Start your 30-day free trial—full access to everything.