What is the P/E ratio?

The P/E ratio compares a company's share price with its earnings per share. It helps investors understand how much they are paying for each rupee of profit.

Is a lower P/E always better?

Not necessarily. A lower P/E can reflect weaker growth expectations, but it can also be attractive if the company is solid. The ratio should be compared with peers and the company's history.

P/E Ratio | Stock Market Basics

Introduction

Price compared with earnings

The price-to-earnings ratio, or P/E ratio, compares a company's share price with its earnings per share (EPS). It is commonly expressed as a number followed by "times."

The short answer

P/E shows how many times the share price is the EPS used in the calculation. It is one valuation measure—not a promise of future growth or return.

The formula

Divide share price by EPS

P/E Ratio = Share Price ÷ EPS

For example, if a share is priced at ₹1,000 and the relevant EPS is ₹50, the P/E is ₹20, or 20 times.

P/E calculations may use past (trailing) earnings or estimated future (forward) earnings. Always check which EPS period and calculation a source uses.

₹1,000 example

Calculate an illustrative P/E

Enter a share price and positive EPS to see the ratio.

Share price (₹)Earnings per share (₹)

Illustrative P/E ratio

20 times

₹1,000 share price ÷ ₹50 EPS

This is a learning example, not live market data or an assessment of any specific share.

How to interpret it

A higher or lower P/E needs context

A higher P/E can reflect expectations of future growth, but expectations may not be met.
A lower P/E does not automatically mean a share is cheap; it may reflect risks or weaker prospects.
Compare companies with similar business models and consider their growth, risk, and industry conditions.
Check whether the ratio uses trailing or forward EPS and look for one-off earnings effects.
When EPS is zero or negative, a conventional P/E is generally not meaningful in the usual way.
P/E does not include every factor, such as debt, cash flow, or the quality and sustainability of earnings.

Key points

What to remember

P/E = share price ÷ earnings per share.
It is usually expressed as a multiple, such as 20 times.
Check whether it uses past or estimated future earnings.
A high P/E is not automatically expensive, and a low P/E is not automatically cheap.
Zero or negative EPS makes the conventional P/E difficult to interpret.
Use P/E with other company and industry information; it does not guarantee returns.

This lesson is for education only, not personalized financial, tax, or investment advice. Investments in securities are subject to market risks.

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