Price to Earnings Ratio Calculator

Common Questions

What does the P/E ratio actually tell me?

It is the price you are paying for each dollar of the company's annual earnings. A P/E of 20 means the market is charging twenty dollars for a dollar of profit, or equivalently that the company would take twenty years to earn back your purchase price at current profitability. It is a price tag, not a verdict.

What is a good P/E ratio?

There is no universal number. The S&P 500 has traded at a long-run average of roughly 15 to 18 times earnings, but utilities routinely trade in the low teens while software companies trade at forty or more. A P/E is only interpretable against the company's own history, its sector, and its growth rate.

What is the difference between trailing and forward P/E?

Trailing P/E uses the last twelve months of actual reported earnings — a fact. Forward P/E uses analyst estimates for the next twelve months — an opinion. Forward P/E is almost always lower because analysts assume growth, and it is only as reliable as those estimates, which are systematically optimistic.

Why do some companies have no P/E ratio?

Because they have no earnings. A company with negative net income produces a negative or undefined P/E, which is why loss-making growth companies are usually valued on price-to-sales or enterprise value to revenue instead. A missing P/E is information, not an error.

What is the earnings yield?

The P/E inverted — earnings per share divided by price, expressed as a percentage. A P/E of 25 is an earnings yield of 4 percent. This is useful because it puts equity valuation on the same scale as bond yields, letting you compare what stocks earn against what Treasurys pay.

How does the PEG ratio improve on P/E?

It divides P/E by the expected earnings growth rate, so a company on 30 times earnings growing at 30 percent scores 1.0, the same as one on 10 times growing at 10 percent. Peter Lynch popularized 1.0 as the rough fair-value line. It depends entirely on the growth estimate being right.

Can P/E be manipulated?

Earnings can be, which amounts to the same thing. One-off gains, changes in depreciation policy, and aggressive revenue recognition all move reported EPS. Share buybacks reduce the share count and mechanically raise EPS without any operational improvement. Look at cash flow alongside earnings before trusting a P/E.

What is the Shiller CAPE ratio?

Cyclically adjusted price to earnings — the price divided by the average of the last ten years of inflation-adjusted earnings. Smoothing a decade removes the distortion from recession-year earnings collapses. CAPE has historically been a weak short-term timing signal but a reasonable indicator of long-run expected returns.

Should I avoid stocks with high P/E ratios?

Not automatically. A high P/E reflects expectations of growth; the risk is that those expectations disappoint. Equally, a low P/E may reflect a business in genuine decline — the value trap. P/E identifies what the market believes about a company, and your job is to judge whether that belief is right.