MLS Maker Label Studio
Cited standard/category: Finance & Supply Chain

Retail GMROI Calculator

Measure retail inventory profitability, rank SKUs or categories, and model markdown impact using GMROI.

Inputs

Use average inventory at cost, or leave it blank and enter beginning plus ending inventory.

GMROI definition: gross margin return on inventory investment equals gross margin dollars divided by average inventory cost. Gross margin dollars = revenue - COGS, and inventory turnover = COGS / average inventory at cost.

SKU / Category Revenue COGS Avg inventory at cost Beginning inventory Ending inventory

Markdown Simulator

Applies one markdown rate to revenue while COGS and average inventory stay unchanged.

Sim revenue $0.00
Sim GM$ $0.00
Sim GM% 0.0%
Sim GMROI 0.00

Retail GMROI Calculator

Maker Label Studio | Finance & Supply Chain | GMROI = gross margin dollars / average inventory cost

Results

Enter revenue, COGS, and inventory at cost to calculate GMROI.

Awaiting inputs
No valid inventory rows yet.

Self-Tests

Golden cases verify GMROI, turnover, margin, and markdown calculations.

Self-tests not run.

About the Retail GMROI Calculator

Merchants, planners, buyers, and store operators use a retail GMROI calculation to see how much gross margin is produced for each dollar invested in inventory. The calculator compares gross margin dollars with average inventory cost, helping teams evaluate SKUs, departments, vendors, and seasonal buys without relying only on sales volume.

How it works

  1. Enter sales and cost of goods sold, or enter gross margin dollars directly.
  2. Add beginning and ending inventory at cost for the analysis period.
  3. Review average inventory cost and GMROI.
  4. Compare the result across SKUs, classes, vendors, or stores.
  5. Use the output with turnover, sell-through, and margin rate before making assortment decisions.

Frequently asked questions

How is retail GMROI calculated?

GMROI is gross margin dollars divided by average inventory cost. It shows how efficiently inventory investment produces margin.

Why can a high-sales SKU have a weak GMROI?

A product can sell quickly but produce low margin or require too much inventory. GMROI highlights that capital efficiency problem better than sales dollars alone.

Should inventory be entered at retail price or cost?

GMROI normally uses average inventory at cost. Mixing retail inventory values with cost-based margin will distort the result.

How often should a retailer review GMROI?

Review it at the cadence that matches buying decisions, such as monthly, seasonally, or after a promotion. Short periods can be noisy for slow-moving or seasonal categories.

References