Peg Ratio Calculator - P/E and Growth

A peg ratio calculator compares a stock's price-to-earnings multiple with its earnings-per-share growth rate so you can see whether valuation and growth assumptions are moving together. Use it when screening growth stocks, comparing companies in the same industry, checking whether a high P/E is partly supported by growth, or documenting the assumptions behind a watchlist review.

• • Growth stock screening: Compare companies whose P/E ratios look high until growth is included.
• • Peer comparison: Put two companies on the same P/E-to-growth scale before deeper analysis.
• • Filing review: Pair reported EPS with a selected price and a growth estimate from the same research period.
• • Assumption check: See how much the result changes when the growth rate is trailing, forward, or analyst-estimate based.

PEG is narrower than a full valuation model. It does not estimate intrinsic value, cash flow, balance-sheet risk, or dividend quality. Its job is to answer a smaller question: how large is the P/E multiple compared with the growth rate you entered? That makes it useful for quick screening, but not enough for a buy or sell decision.

The calculator lets you enter an already-known P/E ratio or derive P/E from share price and EPS. That matters because quote pages, filings, and analyst reports may use different EPS periods. Keep price, EPS, and growth basis consistent before comparing the output across stocks.

When the earnings input itself needs review, the EPS Calculator shows how net income and share count become earnings per share before PEG is calculated.

The peg ratio calculator divides the P/E multiple by EPS growth entered as percent points, then labels the result without treating it as investment advice.

• P/E ratio: Price per share divided by earnings per share, or the direct multiple entered by the user.
• EPS growth rate: Annual earnings-per-share growth entered as percent points, such as 12 for 12%.
• Share price: The selected stock price used only when the calculator derives P/E from price and EPS.
• Growth basis: A label showing whether the growth rate is historical, forward looking, or based on analyst estimates.

Enter growth as a percent value, not a decimal. A growth rate of 12% should be entered as 12. If you enter 0.12, the calculator reads that as 0.12%, which produces a much larger PEG result.

A lower PEG can suggest that the price is modest relative to entered growth, while a higher PEG can suggest the opposite. Treat that reading as a prompt for more review. Forecasts can change quickly, and the same PEG level may mean different things in software, banking, utilities, or cyclical industrials.

According to CFA Institute market-based valuation reading, the PEG ratio is calculated as the ratio of P/E to the consensus growth forecast.

If the growth denominator is missing, the EPS Growth Calculator helps calculate the EPS growth rate that feeds the PEG formula.

Four concepts keep the PEG result from being read too broadly.

A common rule of thumb treats PEG near 1.00 as a balanced price-to-growth relationship, but that is not a universal fair-value rule. A stable company with slower growth, a debt-heavy company, and a fast-growing company with uncertain margins can deserve different multiples.

Negative earnings or negative growth usually makes PEG unhelpful. A negative value may be mathematically possible in a spreadsheet, but it does not provide the normal price-to-growth reading investors expect.

For a broader valuation view beyond one multiple, the Business Valuation Calculator adds business assumptions that PEG intentionally leaves out.

Use one consistent data set for each peg ratio calculator run. Mixing current price with old EPS or stale growth can distort the result.

1. 1 Choose input mode: Select direct P/E if you already trust the multiple, or choose price plus EPS when you want the calculator to derive P/E.
2. 2 Enter valuation inputs: Add the P/E ratio, or enter share price and positive EPS for the same company and period.
3. 3 Enter EPS growth: Type the growth rate as percent points. Use 15 for 15%, not 0.15.
4. 4 Label the basis: Pick trailing, forward, or analyst estimate so the result can be read with the right level of uncertainty.
5. 5 Compare the reading: Review PEG, P/E used, and the P/E that would equal PEG 1.00, then compare against close peers.

Suppose two software companies both have strong revenue growth. Company A has P/E 36 and expected EPS growth of 18%, giving PEG 2.00. Company B has P/E 28 and expected EPS growth of 20%, giving PEG 1.40. The second stock has a lower price-to-growth reading, but you would still review margins, retention, debt, and forecast risk before drawing a conclusion.

The benefit is not certainty. The benefit is a clearer first-pass comparison.

• • Adds growth to P/E: A high P/E can look less extreme when growth is strong, and a low P/E can look less attractive when growth is weak.
• • Documents assumptions: The basis selector makes it clear whether the result relies on historical growth or forecasts.
• • Supports peer review: PEG gives a compact number for comparing companies that operate in similar sectors.
• • Shows sensitivity: Changing the growth rate quickly reveals whether the valuation case depends on a narrow forecast.
• • Connects to EPS work: The price plus EPS mode helps users move from filing data to valuation without a separate P/E calculation.

The calculator is especially useful when a stock screen returns companies with very different P/E ratios. Instead of rejecting every high-P/E stock immediately, PEG asks whether earnings growth partly explains the multiple.

The output also helps investment discussions stay precise. Saying a stock has a PEG of 1.40 using forward growth is more useful than saying it is expensive or cheap without naming the growth assumption.

When a company pays dividends, the Dividend Payout Ratio Calculator connects earnings with dividend coverage instead of focusing only on growth.

The same PEG ratio can deserve different treatment depending on the source data and business context.

• • PEG does not measure cash flow, debt capacity, competitive position, or dividend safety.
• • The calculator rejects zero or negative growth because the standard PEG interpretation depends on a positive growth denominator.
• • A low PEG is not a recommendation. It can reflect a real bargain, weak forecast credibility, unusual earnings, or risk that the market is already pricing.

Use source documents when possible. Public-company filings can clarify whether EPS is basic, diluted, adjusted, trailing, or affected by unusual items. Quote-page numbers may be convenient, but they can hide the exact earnings basis.

For a public company, compare PEG with several other measures before acting. Dividend policy, leverage, cash conversion, margins, and return on capital can all change the story behind the ratio.

According to SEC Beginner's Guide to Financial Statements, EPS is net income divided by outstanding shares and P/E equals price per share divided by earnings per share.

According to FINRA terms and acronyms, PEG means price/earnings to growth and appears alongside valuation measures such as P/E, P/B, and P/S.

When leverage may explain a low valuation multiple, the Debt to Equity Calculator checks whether debt levels are part of the risk story.