Operating Margin Calculator
Operating margin is one of the clearest measures of how profitable a company's core business really is. It divides operating income by revenue and shows the result as a percentage, telling you how many cents of operating profit the firm keeps from every dollar of sales. Because it stops at operating income, the figure captures the efficiency of day-to-day trading after the cost of goods sold and operating expenses, but before interest and tax muddy the picture. An operating margin of 15% means the business earns 15 cents of operating profit per dollar of revenue, money it can use to cover financing, taxes and reinvestment. This calculator takes your revenue and operating income and returns the margin instantly, so you can compare two periods, two divisions or two companies on a level footing. Both inputs are left fully editable so you can match the exact figures on your income statement. The US Securities and Exchange Commission explains how to read income statements and the profitability measures drawn from them through its Investor.gov education site. Every result here is computed deterministically from the standard formula, shown in full below, with a worked example that reconciles exactly to the calculator so you can follow each step.
Operating margin is operating income / revenue. $150,000 of operating income on $1,000,000 of revenue is a 15.00% operating margin.
Operating margin formula
operating margin (%) = operating income / revenue x 100
operating income = revenue - cost of goods sold - operating expenses
revenue = total sales for the period
result is the operating profit kept per dollar of sales
Dividing operating income by revenue strips out the effect of company size and expresses profitability as a rate. Multiplying by 100 turns the decimal into a percentage that is easy to compare across periods and businesses.
Worked example
A company reports 1,000,000 in revenue and 150,000 in operating income for the year.
- Divide operating income by revenue: 150,000 / 1,000,000 = 0.15
- Multiply by 100 to get a percentage: 0.15 x 100 = 15
- Operating margin = 15.00%
So the business keeps 15.00% of every sales dollar as operating profit. These are the calculator's default inputs, so the result above matches the widget exactly.
Operating margin at different income levels
With revenue fixed at 1,000,000, this table shows how operating margin changes as operating income changes.
| Operating income | Revenue | Operating margin |
|---|---|---|
| 50,000 | 1,000,000 | 5.00% |
| 100,000 | 1,000,000 | 10.00% |
| 150,000 | 1,000,000 | 15.00% |
| 250,000 | 1,000,000 | 25.00% |
| 400,000 | 1,000,000 | 40.00% |
Reading income statements and profitability measures: US Securities and Exchange Commission, Investor.gov.
Operating margin calculator: frequently asked questions
What is operating margin?
Operating margin is operating income divided by revenue, shown as a percentage. It measures how much profit a company makes from its core operations on each dollar of sales, after paying the cost of goods sold and operating expenses but before interest and tax. An operating margin of 15% means the business keeps 15 cents of operating profit for every dollar of revenue. It is a widely used gauge of how efficiently a company runs day to day.
What is the difference between operating margin and net margin?
Operating margin stops at operating income, so it ignores interest expense, one-off items and tax. Net margin goes further, dividing net income, the final bottom-line profit after everything, by revenue. Operating margin therefore isolates how well the core business performs, while net margin reflects the full result including financing and tax decisions. Comparing the two shows how much of a company's profit is eaten by items below operating income.
What is operating income?
Operating income, sometimes called operating profit or EBIT, is revenue minus the cost of goods sold and operating expenses such as wages, rent and marketing. It excludes interest and tax. You will usually find it as a subtotal on the income statement. If your statement does not label it, you can build it by subtracting all operating costs from revenue before any financing or tax lines.
What is a good operating margin?
It varies widely by industry. Software and pharmaceutical firms often post operating margins above 20%, while grocery and airline businesses may run in the low single digits and still be healthy. Rather than chasing a universal target, compare a company's operating margin against its own history and its direct competitors. A rising margin usually signals improving efficiency or pricing power.
Can operating margin be negative?
Yes. If operating expenses exceed revenue, operating income is negative and so is the margin. A negative operating margin means the core business is losing money before interest and tax are even considered, which is common for early-stage companies investing for growth but a warning sign for a mature firm. Tracking the trend over several periods matters more than any single reading.
Official sources
- Reading income statements and profitability measures: US Securities and Exchange Commission, Investor.gov. As at 24 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 24 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.