GMROI Calculator

Gross Margin Return on Investment (GMROI) is a financial metric used by businesses to assess the efficiency of their inventory management in generating profit. It provides insights into how effectively a company is utilizing its inventory to generate profits relative to the investment made in that inventory.

Formula: The GMROI formula is calculated by dividing the Gross Profit (GP) by the Average Inventory Cost (AIC) and multiplying the result by 100 to express it as a percentage. Mathematically, it can be represented as:

GMROI = (GP / AIC) * 100

How to use:

  1. Input the Gross Profit ($) – This represents the total revenue minus the cost of goods sold.
  2. Input the Average Inventory Cost ($) – This represents the average value of inventory held over a specific period.
  3. Click on the “Calculate” button to obtain the GMROI (%).

Example: Let’s consider a company with a Gross Profit of $50,000 and an Average Inventory Cost of $10,000. By applying the GMROI formula: GMROI = (50000 / 10000) * 100 GMROI = 500%


  1. What is GMROI?
    • GMROI stands for Gross Margin Return on Investment. It’s a financial metric used to measure how efficiently a company turns inventory into profit.
  2. Why is GMROI important?
    • GMROI helps businesses assess the effectiveness of their inventory management strategies and identify areas for improvement.
  3. What does a high GMROI indicate?
    • A high GMROI indicates that the company is generating significant profit relative to its investment in inventory, suggesting efficient inventory management.
  4. What does a low GMROI indicate?
    • A low GMROI suggests that the company’s investment in inventory is not generating substantial returns, indicating inefficiencies in inventory management.
  5. Can GMROI be negative?
    • Yes, GMROI can be negative if the Gross Profit is lower than the Average Inventory Cost, indicating losses on inventory investment.
  6. How often should GMROI be calculated?
    • GMROI should be calculated regularly to monitor inventory performance and make timely adjustments to inventory management strategies.
  7. Can GMROI be used for different time periods?
    • Yes, GMROI can be calculated for different time periods based on the specific needs of the business, such as monthly, quarterly, or annually.
  8. Is GMROI applicable to all types of businesses?
    • Yes, GMROI can be used by various types of businesses, including retail, manufacturing, and wholesale, to evaluate inventory performance.
  9. What factors can influence GMROI?
    • Factors such as sales trends, inventory turnover, pricing strategies, and purchasing decisions can influence GMROI.
  10. How can businesses improve their GMROI?
    • Businesses can improve their GMROI by optimizing inventory levels, reducing carrying costs, improving sales efficiency, and implementing effective pricing strategies.

Conclusion: The Gross Margin Return on Investment (GMROI) calculator provides businesses with a quick and easy way to evaluate the efficiency of their inventory management practices. By understanding and monitoring GMROI regularly, companies can make informed decisions to optimize their inventory and maximize profitability.