Price-to-Earnings Growth (PEG) Calculator
Price-to-Earnings Growth (PEG) Calculator: The PEG ratio divides the P/E by growth — the value check that stops expensive growth stocks from hiding. Free live results, formulas, benchmarks and worked examples.
P/E means nothing without growth
P/E 20 on 15% growth is PEG 1.33 — price the growth, not the hype.
- Niche-leader market share threshold
- 10%+
- Source: Industry benchmarks
- Healthy DSCR coverage lenders require
- 1.25x
- Source: U.S. SBA
- PMI boundary for most property loans
- 80% LTV
- Source: Industry benchmarks
- Healthy credit utilization for scores
- 30% or less
- Source: Industry benchmarks
Interactive Calculator
Enter your numbers — every result below updates instantly. Free forever, no sign-up.
Price-to-Earnings Growth (PEG) Calculator inputs
Price-to-Earnings Growth (PEG) Calculator results
Visual Price & Profit Breakdown
See exactly where every dollar of your selling price goes — costs, fees, and the profit you keep.
- Growth justified1.33
- Premium0.33
PEG of 1.0 is the fair line — below it you pay less than growth, above it you pay a premium.
Key Takeaways
The 30-second version — the exact answers Google loves to feature.
- 1PEG = 20 / 15 = 1.33.
- 21.33 sits between fair at 1.0 and stretched at 2.0.
- 3PEG needs positive growth — zero or negative growth breaks the signal.
- 4Compare PEG only within the same sector and rate regime.
Business Statistics That Shape Smart Pricing
Benchmarks from widely-cited industry research. Use them to sanity-check your margins, fees, and conversion assumptions.
- Niche-leader market share threshold
- 10%+
- Source: Industry benchmarks
- Healthy DSCR coverage lenders require
- 1.25x
- Source: U.S. SBA
- PMI boundary for most property loans
- 80% LTV
- Source: Industry benchmarks
- Healthy credit utilization for scores
- 30% or less
- Source: Industry benchmarks
Pricing Plans Compared: Which Strategy Fits Your Business?
Three proven pricing plans for this calculator's niche. Match the plan to your stage, then plug its margin target into the calculator above.
Starter
Best for: freelancers and new LLCs tracking the basics
- Price rule: Track totals in one ledger; reconcile quarterly
- Margin target: PEG near 1.0
- Fees: Book all-in costs; no splits yet
Growth
Best for: growing SMBs reviewing monthly
- Price rule: Close books by day 5; review ratios monthly
- Margin target: PEG near 1.0
- Fees: Split prepaid, payroll and tax accruals
Scale
Best for: audit-ready companies with a controller
- Price rule: Board pack with trends and covenant tracking
- Margin target: PEG near 1.0
- Fees: Segment reporting plus covenant tracking
Industry Benchmarks: Typical Margins & Markups
Compare your numbers against common verticals before you lock a price. Your required markup must cover overhead plus target profit.
| Industry | Typical net margin | Typical markup | Notes |
|---|---|---|---|
| Retail (small) | Net margin 3–6% | Gross margin 40–55% | Shrink and discounts decide the bottom line. |
| Professional services | Net margin 15–25% | Gross margin 60–80% | Payroll is COGS in disguise — track it monthly. |
| Manufacturing | Net margin 6–12% | Gross margin 25–40% | Reconcile inventory before trusting gross profit. |
| SaaS / software | Net margin 10–25% | Gross margin 70–85% | Hosting + support are the real COGS. |
| Restaurants | Net margin 4–9% | Gross margin 60–70% | Food cost above 33% needs immediate action. |
| Construction | Net margin 5–10% | Gross margin 20–30% | Job-cost each project; averages hide losers. |
Formulas & How to Use This Calculator
PEG definition
PEG = (Price / EPS) / Growth % Use the same forward or trailing basis for both halves
Fair value read
PEG < 1 undervalued · PEG = 1 fair · PEG > 2 overvalued
How to use — step by step
- Enter your p/e ratio (x) in the matching input box (decimals allowed).
- Enter your earnings growth (%) in the matching input box (decimals allowed).
- Check the live results panel — Price-to-Earnings Growth (PEG) Calculator result recalculates on every keystroke.
- Read the warning banner if one appears, then scroll to the breakdown bars to see the mix visually.
Worked Examples
Real numbers, fully worked — copy the pattern for your own products and services.
Default stock
Inputs
P/E 20, growth 15%
Math
PEG = 20 / 15 = 1.33
Result
PEG 1.33
Value pick
Inputs
P/E 12, growth 18%
Math
PEG = 12 / 18 = 0.67
Result
PEG 0.67
Hype stock
Inputs
P/E 60, growth 20%
Math
PEG = 60 / 20 = 3.00
Result
PEG 3.00
Advanced Education: Master This Topic
Beyond the basics — the concepts professionals use to price for profit across channels, seasons, and competitors. Each section below targets a real long-tail search.
What PEG ratio measures and why it matters
The PEG ratio divides the P/E by growth — the value check that stops expensive growth stocks from hiding. Banks, investors and operators all read PEG ratio before deciding, because peg = p/e ratio / earnings growth %. A single period can mislead, so compare at least 4 quarters: a one-off spike says nothing about the engine, while a 3-year trend in PEG ratio predicts trouble 6 to 12 months early. Put this calculator beside your monthly close and record each result so the trend is visible.
The PEG ratio formula, piece by piece
The working formula is PEG = P/E Ratio / Earnings Growth %. Every input must come from the same period and the same basis — never mix annual with quarterly figures. Keep units consistent: dollars with dollars, percentages as whole numbers in inputs and decimals inside the math, then format at the end.
How to read the result: what counts as good
A PEG below 1.0 hints undervalued, around 1.0 is fairly priced, and above 2.0 flags overvalued. Context matters more than the absolute number: compare against your own last 8 quarters, then against 3 to 5 direct competitors of similar size. If the result sits within 10% of a covenant or policy threshold, flag it immediately.
Cash versus accrual: why PEG ratio can mislead
Under accrual accounting, revenue booked today may arrive as cash 60 days later while costs hit now — so PEG ratio can look healthy while cash drains. Always cross-check against operating cash flow: if profit grows but cash falls, receivables or inventory are swallowing the gain.
Levers that move PEG ratio up or down
Five levers move almost any business metric: price (a 2% rise often beats a 10% volume push), mix (steer toward high-margin lines), cost discipline (renegotiate top vendors yearly), asset lightness (clear dead stock), and structure (debt boosts returns but adds risk). Model each lever above before acting.
How PEG ratio links to the wider picture
No metric lives alone. Market metrics link to pricing power, leverage metrics link to DSCR and covenants, and project metrics link to EVM control. Run this page together with the related calculators below for the full picture.
Industry Playbooks
Cost structures differ by vertical — here is how to adapt one base price per business type without losing margin.
Retail
Retail lives on volume, so track PEG ratio weekly against sell-through reports. Recompute monthly and keep inputs on the same basis for a clean trend.
Services
Service firms hide labor inside opex, so pair PEG ratio with utilization rates. Recompute monthly and keep inputs on the same basis for a clean trend.
Manufacturing
Manufacturers must reconcile counts before trusting PEG ratio. Recompute monthly and keep inputs on the same basis for a clean trend.
SaaS
SaaS books cash upfront but recognizes monthly, so view PEG ratio beside MRR and churn. Recompute monthly and keep inputs on the same basis for a clean trend.
Glossary: Key Terms Explained
- Accrual basis
- Revenue and expenses are recorded when earned or incurred, not when cash moves — the GAAP standard behind the income statement.
- Matching principle
- Costs are recognized in the same period as the revenue they helped create.
- Materiality
- Small errors that would not change a decision can be ignored; large ones must be corrected.
- Going concern
- Statements assume the business keeps operating.
- P/E ratio
- Price divided by earnings per share — what you pay per dollar of profit.
- Earnings growth
- Expected yearly percent rise in EPS, usually forward 3-5 year.
- Fair value
- Price matching fundamentals, near PEG 1.0.
- Growth trap
- Fast forecast growth that never converts into cash earnings.
Common Mistakes & Pro Tips
Mistakes that kill margin
- Mixing periods or currencies in one PEG ratio calculation.
- Using ending balances instead of averages for stock denominators.
- Annualizing one seasonal quarter without a trailing-12-month check.
- Comparing PEG ratio against the wrong industry.
- Ignoring one-off gains and charges that distort the trend.
- Rounding inputs to thousands, flipping borderline verdicts.
Pro tips to grow profit
- Save every PEG ratio result monthly; the trend beats any single reading.
- Recompute PEG ratio on a trailing-12-month basis before big decisions.
- Stress-test inputs 10% up and down to find the driver.
- Pair PEG ratio with cash flow so illusions cannot hide.
- Benchmark against 3 to 5 same-size peers.
- Put covenant-linked metrics on a one-page dashboard updated by day 5.
Who Should Use This Calculator?
- ▸ Founders tracking monthly health with the Price-to-Earnings Growth (PEG) Calculator.
- ▸ Accountants preparing month-end closes faster.
- ▸ Lenders and analysts screening borrowers.
- ▸ Students learning analysis with live numbers.
- ▸ CFOs benchmarking divisions each quarter.
- ▸ Investors comparing targets on equal footing.
- ▸ Bookkeepers validating statements before filing.
Related Business Calculators
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Frequently Asked Questions (15)
Long-tail answers: each question targets a real Google search about price-to-earnings growth (peg) calculator — click to expand.
How do you calculate PEG ratio?
What is the formula for PEG ratio?
What is a good PEG ratio?
How to calculate PEG ratio in Excel?
What is PEG ratio with an example?
Why is my PEG ratio negative?
How often should I check PEG ratio?
What is the difference between PEG ratio and cash flow?
Does PEG ratio include taxes?
How can a small business improve PEG ratio?
What mistakes distort PEG ratio?
Is PEG ratio the same under GAAP and IFRS?
Which statements feed PEG ratio?
Can PEG ratio be too high?
Where can I learn more about PEG ratio?
Resources & Authoritative References
Further reading
- Investopedia — Business Ratios Explained — Plain-English definitions and worked examples for market, leverage and project metrics.
- U.S. SBA — Manage Business Finances — Free federal guidance on pricing, borrowing, leasing and reading statements.
- Corporate Finance Institute — Free lessons on valuation, DSCR, EVM, HHI and working-capital math.
- AccountingTools — Practitioner reference on costs, leases, EVM and project controls.
Authoritative sources
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Last updated: October 2026 · Free forever · No sign-up · Part of Business Calculators at Atlascalcs.com · Embed any result with ?embed=1