2026-09-22 7 min read

PEG Ratio Calculator

PEG ratio: P/E per point of earnings growth. Live calculator with worked steps and charts.

Calculator

Share Price Help

Market price per share.

Earnings per Share (EPS)

Expected Earnings Growth Rate(%)

This valuation ratios calculator runs on standard equity maths: price moves plus dividends minus costs drive returns, payouts drive income, and multiples or discounted cash drive value.

Results

Normal

PEG Ratio

1.33

P/E per point of growth.

P/E Behind It

20.00

Growth Rate Used

15.00%

Live results update as you type — currently showing peg ratio of 1.33. Replace the defaults with your own prices, payouts and share counts for an exact answer.

Visualizations

PEG (Lower Is Better)

1.3

Formula

Growth-adjusted multiple: P/E per point of earnings growth, with ~1.0 as the classic fair line.

PEG = (Price ÷ EPS) ÷ Growth rate

Variables

Symbol	Name	Unit	Description
P/E	P/E	multiple	Price ÷ EPS
g	Growth	percent	Expected EPS growth

Explanation

This is how much P/E you pay per point of growth.

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Compute the ordinary P/E first.

P/E = price ÷ EPS

Price:$120.00

EPS:$6.00

Result: 20.00

Step 2

Divide the P/E by the growth rate.

PEG = P/E ÷ growth

Growth:15.00%

Result: 1.33

Step 3

Around 1.0 is the classic fair-value line.

Fair ≈ 1.0

PEG:1.33

Result: Above the fair line

Final Answer

1.33

Worked Examples

See how the calculator works with different scenarios.

Scenario

The peg ratio calculator run on the values above, showing the full calculation path rather than only the answer.

Inputs

Share Price:$120

Earnings per Share (EPS):$6

Expected Earnings Growth Rate:15%

Calculation

1. Compute the ordinary P/E first. → 20.00 2. Divide the P/E by the growth rate. → 1.33 3. Around 1.0 is the classic fair-value line. → Above the fair line

Result

PEG Ratio: 1.33

Interpretation

This is how much P/E you pay per point of growth.

Understanding Your Result

Your Result: PEG Ratio: 1.33

What This Means

This is how much P/E you pay per point of growth.

Why It Matters

PEG 1.33 (P/E 20.0 ÷ 15.00% growth).

Professional Interpretation

PEG 1.33 (P/E 20.0 ÷ 15.00% growth).

How this is calculated

Growth-adjusted multiple: P/E per point of earnings growth, with ~1.0 as the classic fair line.

What drives the result

Every multiple is price divided by something fundamental, so cheapness always depends on the denominator surviving. Enterprise value fixes market cap for debt and cash, forward estimates trade certainty for relevance, and discounted cash flow makes the growth, margin and discount assumptions explicit — the range they produce is the answer, not the midpoint.

Recommendations

•PEG only compares within growth cohorts — a utility at 2.0 differs from a SaaS name at 2.0.
•Use forward growth for forward P/E to keep both sides consistent.

Educational Content

Introduction

Valuation translates stories into multiples and cash into present value. Ratios (P/E, PEG, P/B, P/S, EV/EBITDA) price each dollar of earnings, growth, book, sales and operating cash; DCF, Gordon and intrinsic models discount the future; quality ratios (ROE, ROIC) and yields (earnings, FCF) test whether the price deserves to hold.

Concept Explanation

Applications

▸Screening cheap versus expensive within a sector on consistent multiples

▸Adjusting market cap for debt and cash before comparing takeovers

▸Discounting dividends or free cash flow to a per-share fair value

▸Demanding a margin of safety between price and intrinsic worth

Benefits

•Puts every holding on the same per-share, per-dollar footing
•Separates operating performance (ROIC) from leverage flattery (ROE)
•Makes DCF assumptions auditable instead of hidden in a target price
•Turns “is it cheap?” into a number with a buffer, not a feeling

Limitations

•Multiples collapse on negative or cyclical denominators — use the right ratio per situation
•Terminal value often carries most of a DCF, so small tweaks swing the answer
•Accounting choices (goodwill, stock comp, leases) distort book, earnings and FCF
•Cheap stocks can stay cheap for structural reasons the multiple cannot see

Best Practices

•Compare multiples only within sectors and growth cohorts
•Use diluted shares and enterprise value for takeover-relevant math
•Stress every DCF ±2pts on discount and ±1pt on terminal growth
•Require a 20–40% margin of safety before calling anything a bargain

Common Misconceptions

Myth: A low P/E always means cheap

Truth: Cyclical peaks inflate earnings and flatter P/E right before the fall — normalised or forward earnings tell the truer story.

Myth: Market cap is the takeover price

Truth: Buyers assume debt and pocket cash, so enterprise value — not market cap — is what they actually pay for.

Practical Tips

•Match forward P/E with forward growth consistently.
•Prefer sustained growers over one-year sprinters.

Common Mistakes

PEG on no-growth value

Meaningless near zero growth — division explodes.

Assumptions

This calculator makes the following assumptions to provide estimates:

Positive growth rate: Negative or zero growth breaks the framing.

Limitations

Be aware of these limitations when using this calculator:

Limitation: Multiples collapse on negative or cyclical denominators — use the right ratio per situation

Limitation: Terminal value often carries most of a DCF, so small tweaks swing the answer

Limitation: Accounting choices (goodwill, stock comp, leases) distort book, earnings and FCF

Limitation: Cheap stocks can stay cheap for structural reasons the multiple cannot see

Frequently Asked Questions

Answers to common questions about this calculator.

PEG below 1 — automatic buy?

No: only within growth cohorts and with quality growth, not one-offs.

Who uses the peg ratio calculator?

It is used by growth-at-reasonable-price screeners, by analysts adjusting multiples for speed, and by holders checking the 1.0 fair line. It sits in the Valuation Ratios group of the Stocks, Dividends & Equities section of Atlascalcs.

How accurate is the peg ratio calculator?

Every figure follows directly from the inputs using standard equity mathematics, so it is accurate to the quality of the values you enter. Broker rounding, corporate actions and tax treatment explain small differences against a statement.

Should I compare total return or price return?

Total return — price plus dividends minus fees — is the wealth you actually keep. Price return alone understates buy-and-hold compounding and flatters active trading.

Does rounding change the results?

Every calculation runs on full precision and rounds only for display. Broker statements round to cents and apply their own corporate-action adjustments, so expect tiny differences.

Are taxes included?

No. Taxes depend on holding period, account type and jurisdiction, so every figure here is pre-tax. Short-term gains and non-qualified dividends are typically taxed as ordinary income.

What should I have ready before using these calculators?

Per-share prices, share counts, commissions on both legs, dividends received, and for valuation the earnings, book, sales, debt, cash and share-count figures from the latest filings.

How do splits affect historical prices?

Split-adjust old prices before computing multi-year returns — otherwise a 2-for-1 split looks like a 50% crash. Data providers usually publish adjusted closes for this reason.

Related Calculators

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Related Guides

Deepen your understanding with these educational resources.

Stock returns guide: profit, CAGR and breakeven

How price moves, fees and dividends combine into the return you keep.

Dividend investing guide: yield, growth and DRIPs

Sustainable yields, payout safety and the compounding snowball.

Valuation guide: multiples, DCF and margin of safety

Which multiple when, how DCF works, and what buffer to demand.

Glossary

Technical terms used in mortgage calculations explained in plain language.

PEG ratio: P/E divided by the earnings growth rate — price per point of growth.
P/E ratio: Share price divided by earnings per share — years of current earnings the price represents.
Forward P/E: Share price divided by forecast next-twelve-month earnings.

Authoritative References

Trusted sources and standards referenced by this calculator.

SEC — Investor.gov: stocks, dividends and corporate actions SEC EDGAR — company filings (10-K, 10-Q) for earnings and share counts IRS — Topic 404: dividends (qualified vs ordinary) Federal Reserve — corporate profits and equity valuations (Z.1) S&P Global — S&P 500 earnings and dividend history Morningstar — equity research and valuation methodology

Applicable Standards

Returns computed pre-tax in nominal dollars; commissions and dividends included exactly as enteredCAGR uses discrete annual compounding; yields use trailing-twelve-month dividends over priceMultiples use diluted shares where share counts apply; EV adds debt and subtracts cashMoney rounded for display only; all calculations run at full precision

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Page Information

Last Updated:

2026-09-22

Version:

2.0.0

References:

License:

Free to use for educational and professional purposes.