Degree of Operating Leverage Calculator
The degree of operating leverage (DOL) measures how sensitive a company's operating income is to a change in sales. A high DOL means a small change in revenue produces a large swing in operating profit, because fixed costs are a big share of the cost base. Enter your sales, variable costs, and fixed costs to compute contribution margin, operating income, and your DOL.
Degree of operating leverage formula
Contribution margin = sales - variable costs
Operating income = contribution margin - fixed costs
DOL = contribution margin / operating income
Operating income change % = DOL * sales change %
DOL is the ratio of contribution margin to operating income. Multiply DOL by a percentage change in sales to estimate the percentage change in operating income.
Worked example
Sales are 1,000,000 dollars, variable costs 400,000 dollars, fixed costs 300,000 dollars. Contribution margin = 600,000 dollars. Operating income = 600,000 - 300,000 = 300,000 dollars. DOL = 600,000 / 300,000 = 2.00. A 10 percent rise in sales would raise operating income by about 2.00 times 10 = 20 percent.
Notes on operating leverage
- High operating leverage amplifies profit when sales rise but magnifies losses when sales fall.
- Businesses with large fixed costs (software, manufacturing plants) tend to have high DOL.
- DOL is largest just above break-even and falls as operating income grows.
- If operating income is zero or negative, DOL is undefined or misleading; interpret with care near break-even.
Degree of Operating Leverage Calculator: frequently asked questions
What does a degree of operating leverage of 2 mean?
A DOL of 2 means that for every 1 percent change in sales, operating income changes by about 2 percent in the same direction. The higher the DOL, the more sensitive profit is to sales swings.
How is DOL calculated?
DOL equals contribution margin divided by operating income. Contribution margin is sales minus variable costs, and operating income is contribution margin minus fixed costs.
Is high operating leverage good or bad?
It depends. High operating leverage boosts profit rapidly as sales grow, but it also increases the risk of large losses if sales decline, because fixed costs remain whether or not revenue comes in.
Why is DOL undefined near break-even?
At break-even, operating income is zero, so dividing contribution margin by zero gives an undefined result. Just above break-even, DOL is very large and falls as profits rise.
Sources and methodology
- DOL is a standard cost-accounting definition (contribution margin divided by operating income); no external figure is hardcoded.
- U.S. Securities and Exchange Commission: financial reporting reference.
Reviewed by the CalculatorHub team, edited by James Graham, 19 June 2026. See our methodology.