What is a good P/E ratio?

It depends on the industry and growth expectations. Generally, 15-20 is considered average for the broader market. Compare to industry peers—a tech company at P/E 25 might be cheap while a utility at P/E 25 might be expensive.

What's the difference between trailing and forward P/E?

Trailing P/E uses actual earnings from the past 12 months (historical). Forward P/E uses analyst projections for the next 12 months (forward-looking). Forward P/E is lower if earnings are expected to grow.

Can P/E ratio be negative?

Yes, if a company has negative earnings (losses), the P/E ratio is negative or undefined. In these cases, P/E is not useful—consider other metrics like Price-to-Sales or Price-to-Book.

Is a low P/E always better?

Not necessarily. A low P/E might indicate undervaluation, but it could also signal declining earnings, poor future prospects, or company-specific problems. Always investigate why the P/E is low.

What is the PEG ratio?

PEG (Price/Earnings-to-Growth) divides P/E by the earnings growth rate. A PEG of 1 is considered fair value; below 1 may be undervalued, above 1 may be overvalued. It accounts for growth differences.

Why do tech stocks have high P/E ratios?

Technology companies often have high growth potential, so investors are willing to pay premium prices for future earnings. A P/E of 40 for a company growing earnings 30% annually may be more reasonable than a P/E of 15 for a company with flat earnings.

Should I only use P/E to pick stocks?

No. P/E is one of many valuation metrics. Also consider: PEG ratio, Price-to-Book, Price-to-Sales, free cash flow, debt levels, competitive moat, and overall business quality. P/E alone can be misleading.

P/E Ratio Calculator — Price to Earnings - Bunny Calculator

Complete User Guide

Our P/E Ratio Calculator helps you analyze stock valuations. Here's how to use it:

Step 1: Enter the current Stock Price (market price per share).

Step 2: Enter the Earnings Per Share (EPS). Use trailing EPS (past 12 months) or forward EPS (projected).

Step 3: Click 'Calculate' to see the P/E Ratio.

The calculator also shows whether the P/E is above or below typical market averages and provides context for your analysis.

The Mathematical Formula

P/E Ratio = Stock Price / Earnings Per Share (EPS)

P/E Ratio Formula:

P/E Ratio = Stock Price / Earnings Per Share (EPS)

Related calculations: Earnings Per Share (EPS) = Net Income / Outstanding Shares Implied EPS = Stock Price / P/E Ratio Implied Stock Price = EPS × P/E Ratio

Types of P/E: • Trailing P/E: Uses actual earnings from past 12 months • Forward P/E: Uses projected earnings for next 12 months

Example: Stock at $150, EPS of $10 P/E = $150 / $10 = 15 This means investors pay $15 for every $1 of annual earnings.

About P/E Ratio Calculator — Price to Earnings

The Price-to-Earnings (P/E) Ratio is one of the most widely used metrics in fundamental stock analysis. It measures how much investors are willing to pay for each dollar of a company's earnings, providing insight into market expectations for future growth.

How to interpret P/E ratios: • Higher P/E (above 20-25): Investors expect higher future growth. Common for tech and growth stocks. Can indicate overvaluation if growth doesn't materialize. • Lower P/E (below 10-15): May indicate undervaluation, low growth expectations, or company-specific concerns. Common for mature, stable industries. • Market average: The S&P 500 historically trades at a P/E of 15-20.

P/E ratios vary significantly by industry: • Technology: Often 25-40+ due to growth expectations • Utilities: Typically 10-18 (stable, slow growth) • Financial services: Usually 10-15 • Consumer staples: Around 15-20

Always compare P/E ratios within the same industry and consider other factors like growth rate (using PEG ratio), debt levels, and economic conditions.

Frequently Asked Questions