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Degree of Operating Leverage Calculator

Enter the % change in EBIT and the % change in sales to get the DOL.

How it is calculated

DOL = %ΔEBIT / %ΔSales. You type the two percentage changes yourself, for the same period and in percent (18 for 18%), not the money amounts. EBIT is operating profit, earnings before interest and tax. The result is shown with two decimals as a multiple.

It is read as the percentage move in operating profit for each 1% move in sales. The sign carries through: two falls give a positive DOL, because profit fell more than sales, while one rise and one fall gives a negative number that is hard to interpret and usually signals the inputs came from different periods. A sales change of 0 gives no result, as the division is undefined. The ratio describes the past change you entered and is not a forecast.

Worked example

Sales rose 6% from one year to the next and EBIT rose 18%. DOL = 18 / 6 = 3.00. This means each 1% change in sales moved operating profit by about 3%. If the next year sales fell 6% and the same leverage held, you would expect EBIT to fall around 18%, which is why a high DOL cuts both ways. Entering -18 and -6 gives the same 3.00.

Try this example →

Common mistakes

  • Typing the change in money (for example 40,000) instead of the percentage: the tool divides the two numbers as given, so both must be percentages.
  • Using percentage changes from different periods, such as EBIT change over a year and sales change over a quarter: the ratio then has no meaning.
  • Using net income change instead of EBIT change: interest and tax are included in net income, so the result is not operating leverage.
  • Treating the DOL as a constant: it describes the change you entered, and it rises as the business gets close to its break-even point.

About this calculator

This calculator computes the degree of operating leverage (DOL) as percentage change in EBIT ÷ percentage change in sales. A DOL of 3, for example, means a 10% rise in revenue produces roughly a 30% rise in operating profit — the effect of a company's fixed costs magnifying swings in sales into larger swings in profit.

Businesses with high fixed costs relative to variable costs — airlines, manufacturers with expensive plants, software companies with high upfront development costs — have high operating leverage, so profits swing hard in both directions with revenue. Analysts and finance teams use DOL to gauge how much operating income risk a company carries and to stress-test forecasts under a revenue downturn.

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