Retail Finance Calculators
Margin, markup, ROI, and profitability calculators built for retail finance teams and store owners.
Gross Margin Calculator
The cleanest read on how much of every sales dollar you actually keep after paying for the goods. Gross margin drives every downstream financial decision in retail: what to price, what to promote, what to keep on the shelf. Margin percent, the markup equivalent, cost as a percent of revenue and the price-to-cost multiplier all appear together, which is what it takes to translate between the three lenses without reaching for a second tool.
Gross Margin % = ((Revenue − COGS) ÷ Revenue) × 100
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Markup Calculator
Set a selling price from cost or reverse-engineer the markup baked into an existing price. Markup is the buyer’s language of pricing (percent added on top of cost), while margin is the finance language (percent kept from revenue). Alongside markup percent come profit per unit, the margin equivalent and the price-to-cost multiplier. Buying and finance can then argue about the price rather than about the denominator.
Markup % = ((Selling Price − Cost) ÷ Cost) × 100
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GMROI Calculator
The single most honest cross-category profitability metric in retail. GMROI answers one question: for every dollar of inventory you funded, how many dollars of gross profit did you get back? A high gross margin on inventory that never sells produces zero return, which is why GMROI keeps margin and inventory turnover honest against each other. The output is the GMROI ratio with gross margin percent, inventory turnover, gross profit and a plain-English performance band, because the ratio on its own tells a buyer very little.
GMROI = Gross Profit ÷ Average Inventory (at cost)
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Sell-Through Rate Calculator
The speed-of-sale metric every buyer, planner and category manager reads before touching pricing or reorder decisions. Sell-through rate measures the percent of received units that actually sold across the measurement window. High sell-through means the buy is working. Low sell-through means the inventory is aging faster than expected and the markdown clock is running. Enter units sold and units received and the STR percent arrives next to remaining units, weekly sell rate, and projected weeks to both 80 percent and 100 percent sell-through, with a plain-English band saying whether the buy is on pace. The point of the band is to be acted on, not filed.
Sell-Through Rate % = (Units Sold ÷ Units Received) × 100
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ROI Calculator
Return on investment answers a narrower question than most retail metrics: for this specific dollar spent, on this specific project, how much came back? Unlike gross margin or GMROI, which measure ongoing operating performance, ROI is a one-time verdict on a decision that has already been made or is about to be. A new POS system, a seasonal display buildout, a marketing campaign, a store remodel, an inventory buy that didn't fit the normal replenishment cycle. The ROI percent and the net return are the whole output, which is usually all a finance review asks for.
((Gain − Cost) ÷ Cost) × 100
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Markdown Calculator
The pricing tool every buyer and merchandiser reaches for when inventory is running behind sell-through pace. Out comes the markdown amount, the markdown percent, the final selling price, and, once a cost is entered, the resulting gross profit and margin percent. It also flags whether the markdown depth is promotional, seasonal, aggressive or clearance-tier, and generates practical next-step recommendations tied to gross margin, GMROI, sell-through rate and inventory turnover.
Markdown % = ((Original Selling Price − Markdown Price) ÷ Original Selling Price) × 100
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More Retail Finance resources
Guides, benchmarks and downloadable templates that pair with retail finance calculators.