Finance

Instant, private, and free

PEG Ratio Calculator.

Calculate price-to-earnings growth ratio from explicit inputs.

On-device calculationNo signup

Set your values

Results update as you type.

02 / ANSWER

P/E ratio

Annual earnings growth

PEG ratio

0.00

FAQs

How does the peg ratio calculator work?

Enter the requested values to receive a deterministic result. No live market, tax, or jurisdiction data is inferred.

Use Cases

Compare stock valuations across growth rates

Use the PEG ratio to compare companies with different P/E ratios and growth rates, helping you identify which stock offers better value relative to its growth prospects.

Example: Compare a tech stock with P/E 30 and 20% growth (PEG 1.5) to a utility with P/E 15 and 5% growth (PEG 3.0).

Screen for potentially undervalued growth stocks

Investors often look for PEG ratios below 1 as a sign of undervaluation. This calculator quickly computes the ratio to aid in screening.

Example: A stock with P/E 25 and 30% growth yields a PEG of 0.83, potentially indicating undervaluation.

Frequently Asked Questions

What is the PEG ratio and how is it calculated?: The PEG ratio (price/earnings-to-growth) measures a stock's valuation relative to its earnings growth. It is calculated by dividing the P/E ratio by the annual earnings growth percentage. For example, a P/E of 20 and growth of 10% gives a PEG of 2.0.
What does a PEG ratio less than 1 indicate?: A PEG ratio below 1 is often considered undervalued, as the stock's price is low relative to its expected earnings growth. However, it's a relative measure and should be compared with industry peers and other fundamentals.
Can I use this calculator for negative earnings growth?: Yes, you can enter a negative growth percentage. The calculator will produce a negative PEG ratio, which typically signals that the company's earnings are declining, making the ratio less meaningful for valuation.

Tips & Common Mistakes

Tips

Ensure the P/E ratio and earnings growth are for the same period (e.g., trailing or forward) for consistency.
Use the annual earnings growth percentage, not quarterly, to match the standard PEG calculation.
Compare PEG ratios within the same industry, as growth expectations vary by sector.
Remember that PEG is a relative measure; combine it with other financial metrics for a full analysis.

Common Mistakes to Avoid

Using a P/E ratio based on historical earnings while using forward growth estimates, leading to inconsistent results.
Entering growth as a decimal (e.g., 0.10) instead of a percentage (10), which would incorrectly inflate the PEG ratio.
Ignoring that negative growth produces a negative PEG, which is not interpretable in the usual undervalued/overvalued framework.

Last updated: August 13, 2026

Use Cases

Compare stock valuations across growth rates

Use the PEG ratio to compare companies with different P/E ratios and growth rates, helping you identify which stock offers better value relative to its growth prospects.

Example: Compare a tech stock with P/E 30 and 20% growth (PEG 1.5) to a utility with P/E 15 and 5% growth (PEG 3.0).

Screen for potentially undervalued growth stocks

Investors often look for PEG ratios below 1 as a sign of undervaluation. This calculator quickly computes the ratio to aid in screening.

Example: A stock with P/E 25 and 30% growth yields a PEG of 0.83, potentially indicating undervaluation.

Frequently Asked Questions

What is the PEG ratio and how is it calculated?

The PEG ratio (price/earnings-to-growth) measures a stock's valuation relative to its earnings growth. It is calculated by dividing the P/E ratio by the annual earnings growth percentage. For example, a P/E of 20 and growth of 10% gives a PEG of 2.0.

What does a PEG ratio less than 1 indicate?

A PEG ratio below 1 is often considered undervalued, as the stock's price is low relative to its expected earnings growth. However, it's a relative measure and should be compared with industry peers and other fundamentals.

Can I use this calculator for negative earnings growth?

Yes, you can enter a negative growth percentage. The calculator will produce a negative PEG ratio, which typically signals that the company's earnings are declining, making the ratio less meaningful for valuation.

Tips & Common Mistakes

Tips

Ensure the P/E ratio and earnings growth are for the same period (e.g., trailing or forward) for consistency.
Use the annual earnings growth percentage, not quarterly, to match the standard PEG calculation.
Compare PEG ratios within the same industry, as growth expectations vary by sector.
Remember that PEG is a relative measure; combine it with other financial metrics for a full analysis.

Common Mistakes to Avoid

Using a P/E ratio based on historical earnings while using forward growth estimates, leading to inconsistent results.
Entering growth as a decimal (e.g., 0.10) instead of a percentage (10), which would incorrectly inflate the PEG ratio.
Ignoring that negative growth produces a negative PEG, which is not interpretable in the usual undervalued/overvalued framework.

Finance

Instant, private, and free

PEG Ratio Calculator.

Calculate price-to-earnings growth ratio from explicit inputs.

On-device calculationNo signup

Set your values

Results update as you type.

02 / ANSWER

P/E ratio

Annual earnings growth

PEG ratio

0.00

FAQs

How does the peg ratio calculator work?

Enter the requested values to receive a deterministic result. No live market, tax, or jurisdiction data is inferred.

Related Calculators

Effective Duration CalculatorCalculate effective duration from explicit user inputs with transparent assumptions and instant, debounced results.Effective Interest Rate CalculatorCalculate effective interest rate from explicit user inputs with transparent assumptions and instant, debounced results.EMV CalculatorCalculate emv from explicit user inputs with transparent assumptions and instant, debounced results.Ending Inventory CalculatorCalculate ending inventory from explicit user inputs with transparent assumptions and instant, debounced results.Enterprise Value CalculatorCalculate enterprise value from explicit user inputs with transparent assumptions and instant, debounced results.EOQ CalculatorCalculate eoq from explicit user inputs with transparent assumptions and instant, debounced results.

Use Cases

Compare stock valuations across growth rates

Use the PEG ratio to compare companies with different P/E ratios and growth rates, helping you identify which stock offers better value relative to its growth prospects.

Example: Compare a tech stock with P/E 30 and 20% growth (PEG 1.5) to a utility with P/E 15 and 5% growth (PEG 3.0).

Screen for potentially undervalued growth stocks

Investors often look for PEG ratios below 1 as a sign of undervaluation. This calculator quickly computes the ratio to aid in screening.

Example: A stock with P/E 25 and 30% growth yields a PEG of 0.83, potentially indicating undervaluation.

Frequently Asked Questions

What is the PEG ratio and how is it calculated?: The PEG ratio (price/earnings-to-growth) measures a stock's valuation relative to its earnings growth. It is calculated by dividing the P/E ratio by the annual earnings growth percentage. For example, a P/E of 20 and growth of 10% gives a PEG of 2.0.
What does a PEG ratio less than 1 indicate?: A PEG ratio below 1 is often considered undervalued, as the stock's price is low relative to its expected earnings growth. However, it's a relative measure and should be compared with industry peers and other fundamentals.
Can I use this calculator for negative earnings growth?: Yes, you can enter a negative growth percentage. The calculator will produce a negative PEG ratio, which typically signals that the company's earnings are declining, making the ratio less meaningful for valuation.

Tips & Common Mistakes

Tips

Ensure the P/E ratio and earnings growth are for the same period (e.g., trailing or forward) for consistency.
Use the annual earnings growth percentage, not quarterly, to match the standard PEG calculation.
Compare PEG ratios within the same industry, as growth expectations vary by sector.
Remember that PEG is a relative measure; combine it with other financial metrics for a full analysis.

Common Mistakes to Avoid

Using a P/E ratio based on historical earnings while using forward growth estimates, leading to inconsistent results.
Entering growth as a decimal (e.g., 0.10) instead of a percentage (10), which would incorrectly inflate the PEG ratio.
Ignoring that negative growth produces a negative PEG, which is not interpretable in the usual undervalued/overvalued framework.

Last updated: August 13, 2026