Operating Margin Calculator (EBIT margin)

Understanding the operating margin calculator — concept and principle

This calculator works out operating margin, the share of revenue left as operating income (EBIT) after the cost of goods sold, selling, general and administrative expenses, and depreciation. It also shows gross profit and margin, operating expenses as a share of revenue, the EBITDA margin and how much operating expense a target margin would allow. Managers and analysts use it to judge the profitability of the core business.

Profit from the core business — with the default inputs: 15.9%.

How it is calculated

Gross profit = revenue − cost of goods sold; gross margin = gross profit ÷ revenue × 100
Operating income = gross profit − SG&A − depreciation and amortization
Operating margin = operating income ÷ revenue × 100
Operating expenses as % of revenue = (SG&A + D&A) ÷ revenue × 100
EBITDA margin = (operating income + D&A) ÷ revenue × 100
Most operating expenses for the target = gross profit − revenue × target %

The principle

Operating margin measures how much each sale earns from the business itself, before interest and tax. Because it excludes financing and tax, it allows fair comparison between firms with different debt levels and tax positions. It sits between gross margin, which reflects pricing and product costs, and net margin, which also reflects financing and tax. Working backwards from a target margin at the same revenue and gross profit gives a budget ceiling for operating expenses.

Worked example

Defaults: revenue 850,000; COGS 420,000; SG&A 260,000; D&A 35,000; target 20%.

Gross profit = $430,000; gross margin = 50.6%.
Operating income = 430,000 − 260,000 − 35,000 = $135,000; margin = 15.9%.
Operating expenses = 295,000 ÷ 850,000 = 34.7% of revenue.
EBITDA margin = 170,000 ÷ 850,000 = 20%.
Target operating income = 850,000 × 20% = $170,000; most operating expenses = 430,000 − 170,000 = $260,000.

Each point is the calculator re-run with only “Revenue (net sales)” changed; the gold point is the default example. Change the inputs above and this chart follows your numbers.

Revenue (net sales)	Operating margin
212,500	-236.5%
425,000	-68.2%
637,500	-12.2%
850,000	15.9%
1.06e+06	32.7%
1.28e+06	43.9%
1.7e+06	57.9%

How to read the result

To reach the 20% target at today's revenue, operating expenses must fall from 295,000 to 260,000, a cut of 35,000. The alternative is higher gross profit through prices or product costs. Compare your operating margin with firms in the same industry; asset-heavy and low-price businesses usually run thinner margins.

Common mistakes

Including interest expense in operating costs.
Leaving depreciation out, which shows EBITDA margin instead.
Comparing one-off-heavy years with normal years.
Treating a high EBITDA margin as cash generation; capital spending is ignored.

Keep in mind: Companies define operating income in slightly different ways, especially for one-off items. Not financial advice.

Frequently asked questions

What is the difference between operating margin and EBITDA margin?

Operating margin subtracts depreciation and amortization; EBITDA margin adds them back.

Is operating margin the same as EBIT margin?

Usually, when there are no non-operating items between operating income and EBIT.

What is a good operating margin?

It varies by industry; compare with peers and with your own trend.

Sources: OpenStax, Principles of Accounting, Volume 1: Financial Accounting, section 6.6 (income from operations and gross margin ratio)

Checked 9 Nov 2026. Income from operations = gross margin − operating (selling, general and administrative) expenses; gross margin ratio = (net sales − COGS) ÷ net sales: OpenStax, “Principles of Accounting, Volume 1: Financial Accounting”, section 6.6.

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