This price/earnings ratio calculator helps investors determine whether the stock of a particular company is overvalued or undervalued. If you're looking for a good opportunity to invest, make sure to read on; in the article below, we'll explain what is the price/earnings ratio and how to calculate it, as well as present a simple P/E ratio formula.

If you want to analyze the stock of a company in more detail, head straight to our price-to-book ratio calculator!

What is the price/earnings ratio?

Price/earnings ratio - also often called the price to earnings ratio or the P/E ratio - is a finance indicator that measures a company's stock price concerning earnings per share. In simple words, it shows the balance between price and earnings from the stocks. Thanks to this ratio, we can see how profitable it is to buy shares of a specific company.

Also, we can use the P/E ratio to determine if shares are over- or undervalued. For example, if you consider two companies in the same industry, but with entirely different values of the P/E ratio, it might mean that the valuation of one of them is not believable.

Price/earnings ratio formula

To calculate the price/earnings ratio, you need two elements:

  • Price per share - the market price of a stock. This value heavily depends on the supply and demand on the market.
  • Earnings per share - the profit which a company gains from each outstanding share of common stock. If a company doesn't have any net income, but only net losses, it won't have a P/E ratio.

If you want to know what is the P/E ratio of a certain company, you need to divide the share price by the earnings, according to the P/E ratio formula below:

P/E ratio = share price / earnings per share

How to calculate the price/earnings ratio?

Let's analyze the example of a company that has been on the market for several years. To find out what is their price/earnings ratio, you need to do the following:

  1. Determine the market share price. Let's assume that it is equal to $25.

  2. Determine the earnings per share over the last 12 months. In our example, we'll set this value to $1.80.

  3. Use the price/earnings ratio formula:

P/E ratio = 25/1.80 = 13.90

  1. As you can see, the P/E ratio in our example is roughly 14x earnings.

Interpreting the results of P/E ratio formula

Now that we arrived at a result, we can try to interpret it. As a general rule, a company with a high P/E ratio is considered more profitable on the market - it means that investors are willing to pay more per share because they anticipate fast growth and higher future earnings.

To determine whether the price/earnings ratio is high or low, you need to compare it with the P/E ratios of other companies in the same industry. For instance, if your company has a P/E of 14x earnings, and most of its competitors of 12x earnings, you could say that your business is considered more valuable by the market.

Bogna Szyk
Price per share
Earnings per share
P/E ratio
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