The formula for calculating operating income is: Operating income = Operating revenues – Operating expenses
By looking at operating income, investors and analysts can make more accurate comparisons between companies, as they are looking at the same type of income and expenses.
Operating margin is a measure of how much profit the company is making on each dollar of sales. The operating margin is calculated by dividing operating income by revenues. A higher operating margin indicates that a company is generating more profit from its sales, which is generally considered to be a positive sign of financial performance.