Degree of Operating Leverage Calculator
The degree of operating leverage calculator is a tool that calculates a multiple that rates how much income can change as a consequence of a change in sales. It is also known as operating leverage. In this article, we will learn more about what operating leverage is, its formula, and how to calculate the degree of operating leverage. Furthermore, from an investor's point of view, we will discuss operating leverage vs. financial leverage and use a real example to analyze what the degree of operating leverage tells us.
What is operating leverage?
The degree of operating leverage (DOL) measures how much change in income we can expect as a response to a change in sales. We can say that it is the sales' impact on the company's earnings. In other words, the numerical value of this ratio shows how susceptible the company's earnings before interest and taxes are to its sales.
First, we will start showing the very first formula for calculating the earnings of a company:
where:
 $\small \rm{Sales_{tot}}$ — Total Sales
 $\small \rm{Costs_{tot}}$ — Total Costs
 $\small \rm{EBIT}$ — EBIT: Earnings before interests and taxes
 $\small \rm{Costs_{v}}$ — Variable costs: Such as gas, water, electricity
 $\small \rm{Costs_{f}}$ — Fixed costs: Such as rent, insurance, loan repayments, among others.
Here it is important to remember two points:
 Fixed costs are constant and independent of the level of sales.
 Variable costs increase together with sales.
Hence, if the cost structure has more prominent $\small \rm{variable \ costs}$ relative to the $\small \rm{fixed \ costs}$, a vast increase in sales will not change EBIT that much. A considerable part of the $\small \rm{total \ sales}$ will be reduced by the growth in $\small \rm{variable \ costs}$.
Contrastly, if the $\small \rm{fixed \ costs}$ are significant relative to the $\small \rm{variable \ costs}$, the EBIT will follow when the sales increase dramatically because those $\small \rm{variable \ costs}$ will remain low in comparison.
If this explanation does not satisfy your curiosity about cost structures, you should consider checking out this article about contribution margin, in which the authors explain these terms more deeply.
Back to the operating leverage definition: since it considers sales and EBIT, it is already taking into account the effects of the cost structure.
Once obtained, the way to interpret it is by finding out how many times EBIT will be higher or lower as sales will increase or decrease respectively. For example, for an operating leverage factor equal to 5, it means that if sales increase by 10%, EBIT will increase by 50%. By the way, if you find such a company, do not forget to contact us.
Degree of operating leverage formula
The operating leverage ratio can be obtained directly by a straightforward formula:
where:
 $\small \rm{DOL}$ — Degree of operating leverage
 $\small \rm{\Delta EBIT}$ — Change in EBIT
 $\small \rm{\Delta Sales}$ — Change in Sales
In most cases, you will have the percentage change of sales and EBIT directly. The company usually provides those values on the quarterly and yearly earnings calls. Basically, you can just put the indicated percentage in our degree of operating leverage calculator, even while the presenter is still talking, and voilà.
In other cases where you want to compare specific periods (to avoid the seasonality effect, for example), you will need to calculate the particular variation in sales and EBIT. The formulas you will need are:
where:
 $\small \rm{DOL}$ — Degree of operating leverage
 $\small \rm{Sales_{t2}}$ — Generated sales at the 2nd analysis period
 $\small \rm{Sales_{t1}}$ — Generated sales at the 1st analysis period
 $\small \rm{EBIT_{t2}}$ — Generated EBIT at the 2nd analysis period
 $\small \rm{EBIT_{t1}}$ — Generated EBIT at the 1st analysis period
Ideally, you want to compare the quarter from last year to the quarter of the current year, two consecutive quarters, trailing twelvemonth or yearly values.
What does the degree of operating leverage say?
If you try different combinations of EBIT values and sales on our smart degree of operating leverage calculator, you will find out that several messages are displayed.
We will discuss each of those situations because it is crucial to understand how to interpret it as much as it is to know the operating leverage factor figure.
For the cases when the operating leverage factor is positive:

A $\small \rm{\Delta EBIT >0}$ and a $\small \rm{\Delta Sales >0}$ mean great news: Your company is selling more, and its earnings are growing. Better for you to have a clear return on investment target in case you want to sell. You can also consider reviewing the compounded annual growth rate of the profits to see where your company could be in the next years.

A $\small \rm{\Delta EBIT <0}$ and a $\small \rm{\Delta Sales <0}$ can be the worst combination for a business. It is showing less selling and less profitability. In such a case, it is good for the investor to examine the debt structure first by reviewing how well the interest is covered EBIT vs. EBITDA. You might want to follow the free cash flow as well to get an understanding of the management decision regarding capital expenses.
For the cases when the operating leverage factor is negative:

A $\small \rm{\Delta EBIT >0}$ and a $\small \rm{\Delta Sales <0}$ means that your company is making more profits by selling less. We recommend you analyze its inventory turnover and cash conversion cycle for a better business understanding.

A $\small \rm{\Delta EBIT <0}$ and a $\small \rm{\Delta Sales >0}$ refers to a decrease in profitability. It is wise to start reviewing the cash generation by operations and the consequently free cash flow. In any case, be wary of all the businesses that have a high operating leverage ratio.
Operating leverage vs. financial leverage
Financial and operating leverage are two of the most critical leverages for a business. Besides, they are related because earnings from operations can be boosted by financing; meanwhile, debt will eventually be paid back by those increased earnings. Thus, investors need to measure the impact of both kinds of leverages.
For the particular case of the financial one, our handy return of invested capital calculator can measure its influence on the business returns.
How to calculate the degree of operating leverage?
This section will use the financial data from a real company and put it into our degree of operating leverage calculator.
We will consider two cases: The one in which you already have the percentage change of EBIT and sales and the other one when you do not have this information. Don't worry; you will see that using the operating leverage formula is not difficult.
For the very first case, we have Synnex, a leading company in the information technology sector, which
shows the following quarter to quarter changes:$\small \rm{\Delta Sales = 4.2 \%}$
$\small \rm{\Delta Sales = 0.1 \%}$
Then, by using our degree of operating leverage calculator on the left, we get:
$\small \rm{DOL= 0.02}$
We can notice that Synnex had a meaningful change in sales of 4.2%. However, it does not impact the EBIT that much. That indicates to us that this company might have huge variable costs relative to its sales. Similarly, we can conclude the same by realizing how little the operating leverage ratio is, at only 0.02.
For the second case, the company we are going to use as an example is
(NYSE: HII). HII is an enterprise that manufactures and provides maintenance to ships and submarines of militarygrade.We will need to get the EBIT and the USD sales for the two consecutive periods we want to analyze. In this case, it will be the
.
From both reports, we get the following information:
$\small \rm{Sales_{t1}= 2,263 \ millions \ USD}$
$\small \rm{EBIT_{t1}= 215 \ millions \ USD}$
$\small \rm{Sales_{t2}= 2,027 \ millions \ USD}$
$\small \rm{EBIT_{t2}= 57 \ millions \ USD}$
Then, we use this data as input for our degree of operating leverage calculator:
$\small \rm{\Delta Sales = 10.43 \%}$
$\small \rm{\Delta EBIT = 73.49 \%}$
Using the degree of operating leverage formula, we get the following:
$\small \rm{DOL= 7.05}$
We put this example on purpose because it shows us the worst and most confusing scenario for the operating leverage ratio.
As said above, we can verify that a positive operating leverage ratio does not always mean that the company is growing. Actually, it can mean that the business is deteriorating or going through a bad economic cycle like the one from the 2nd quarter of 2020.
However, it is even more important to notice that a decrease of 10.43% in sales meant a decline of 73.49% in EBIT, showing that a considerable reduction in sales can produce a severe decrease in EBIT. This is precisely the risk of the operating leverage factor. A high degree of operating leverage, like the one we got: 7.05, can mean a significant spike in earnings when the sales grow, but also it can mean a severe crash in the profitability of the business when the sales shrink.
Consequently, if you are considering investing in a company with high operating leverage, you should consider how indebted the business is to verify if it will cover its interest payments, even during tough times when EBIT is unusually low.
Finally, it is essential to have a broad understanding of the business and its financial performance. That's why we highly recommend you check out our other
financial calculators.
In particular, we propose you check the following valuation methods:
 Price to book ratio calculator;
 EBITDA multiple calculator;
 Discounted cash flow calculator; and
 Price earnings ratio calculator.
These calculators are important because as critical as it is to know how the business is doing, the price you are paying for a part of the company is also important.