What Is Operating Margin?
Operating margin — also known as return on sales (ROS) or operating profit margin — measures how much profit a company makes from its core operations for every dollar of revenue, before interest and taxes. It is one of the most-watched profitability ratios because it strips out financing and tax effects to focus purely on operating efficiency.
How to Use This Calculator
Enter your operating income (also called operating profit or EBIT) and your total revenue (net sales) for the same period. The calculator divides operating income by revenue and multiplies by 100 to express the result as a percentage. A higher operating margin means the business converts more of each sales dollar into operating profit.
The Formula Explained
The calculation is simple:
$$\text{Operating Margin} = \frac{\text{Operating Income}}{\text{Revenue}} \times 100\%$$
Operating income equals revenue minus the cost of goods sold and operating expenses (such as wages, rent, depreciation, and SG&A). Because it excludes interest and taxes, operating margin lets you compare the core profitability of companies with different capital structures.
Worked Example
Suppose a company earns $1,000,000 in revenue and reports $150,000 in operating income. $$\text{Operating Margin} = \frac{150{,}000}{1{,}000{,}000} \times 100 = \mathbf{15\%}$$ This means the firm keeps 15 cents of operating profit from every dollar of sales.
FAQ
What is a good operating margin? It varies by industry. Software firms may exceed 25–40%, while grocery and retail often run in the low single digits. Compare against industry peers and the company's own trend.
How is operating margin different from net margin? Net margin includes interest and taxes; operating margin stops at operating income, isolating operational performance.
Can operating margin be negative? Yes. If operating expenses exceed revenue, operating income is negative and so is the margin, signalling an operating loss.
