📊 Warren Buffett's #1 rule: never buy a stock above intrinsic value. With the S&P 500 P/E ratio at 24×, many stocks are overpriced. This DCF calculator shows you what a stock is actually worth — not what the market says. Why valuation matters in 2026 →
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Intrinsic Value Calculator

Calculate the fair value of any stock using DCF analysis or the Benjamin Graham formula. Pre-loaded with 168 S&P 500 companies.

168
Pre-loaded Stocks
39
Undervalued
127
Overvalued
38.4%
Avg Margin of Safety
📊 DCF Calculator
📐 Graham Number
🔍 Stock Screener
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DCF Assumptions

Annual FCF from latest filings
Diluted share count
%
How fast will FCF grow?
%
Long-term GDP growth (2-4%)
%
Required rate of return
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Enter a ticker or input your assumptions
168 stocks pre-loaded with AI-analyzed assumptions

Benjamin Graham Formula

V = EPS × (8.5 + 2g) × 4.4 / Y
Where g = expected growth rate, Y = current AAA bond yield
Trailing twelve months EPS
Next 7-10 years annual EPS growth
Currently ~4.8% (Moody's AAA)

Graham Number

GN = √(22.5 × EPS × BVPS)
Maximum price for a defensive investor
From latest balance sheet
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Enter EPS and growth estimates
Uses Benjamin Graham's original 1974 revised formula

S&P 500 Intrinsic Value Screener

168 stocks with AI-computed DCF valuations. Click any ticker for a detailed analysis.

All (168)
Undervalued
Overvalued
Ticker ↕ Company ↕ Price ↕ Intrinsic Value ↕ Margin ↕ Verdict ↕ Action
76%
Are Overvalued
76% of analyzed S&P 500 stocks trade above their DCF intrinsic value, suggesting stretched valuations across the index.
38.4%
Average Margin of Safety
The 39 undervalued stocks offer an average 38.4% margin of safety — well above Graham's recommended 33% threshold.
$0
Cost to Use
AlphaSpread charges $25/mo. Our calculator is permanently free with pre-loaded data for 168 S&P 500 companies.
2
Valuation Models
DCF (Discounted Cash Flow) for cash-flow-rich companies and Graham Number for conservative value investors. Both free, no signup.

How to Calculate the Intrinsic Value of a Stock

1

Find the Free Cash Flow

Start with the company's annual Free Cash Flow (FCF) from their latest 10-K filing. FCF = Operating Cash Flow minus Capital Expenditures. This represents the actual cash the business generates after maintaining its operations.

2

Estimate Future Growth

Project how fast FCF will grow over the next 5-10 years. Look at historical growth rates, industry trends, and analyst estimates. Be conservative — overestimating growth is the #1 source of valuation errors.

3

Choose a Discount Rate

The discount rate (WACC) represents your required rate of return. Higher risk companies deserve higher discount rates (10-15%). Blue chips can use lower rates (7-10%). Warren Buffett often uses the 10-year Treasury yield as a minimum.

4

Calculate Terminal Value

After your projection period, the company doesn't stop existing. The terminal value captures all cash flows beyond year 10 using a perpetuity growth model (typically 2-3% matching long-term GDP growth).

5

Apply a Margin of Safety

Never pay full intrinsic value. Benjamin Graham recommended at least 33% margin of safety. Warren Buffett looks for 25-50%. This protects you from errors in your assumptions and unforeseen events. If IV = $100, only buy below $67-75.

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Frequently Asked Questions

How do you calculate the intrinsic value of a stock?
The most common method is a Discounted Cash Flow (DCF) analysis. You project the company's future free cash flows, then discount them back to present value using an appropriate discount rate (usually WACC). The sum of all discounted cash flows plus the terminal value gives you the intrinsic value per share. Another popular method is the Benjamin Graham formula, which uses EPS and expected growth rate. Our calculator supports both methods.
What method does Warren Buffett use to calculate intrinsic value?
Warren Buffett primarily uses a DCF model focused on "owner earnings" — net income plus depreciation minus capital expenditures. He applies a discount rate based on the long-term US Treasury yield and looks for companies trading at a significant margin of safety below their calculated intrinsic value. Buffett also emphasizes qualitative factors like competitive moats, management quality, and business predictability that can't be captured in a formula alone.
What is a good margin of safety for stocks?
Benjamin Graham recommended a margin of safety of at least 33%. Warren Buffett typically looks for 25-50% depending on the quality and predictability of the business. For high-quality companies with predictable cash flows (like Coca-Cola or Visa), a 25% margin might suffice. For cyclical or speculative businesses, you'd want 40-50% or more. The margin of safety is your protection against errors in your assumptions.
What is the difference between intrinsic value and market price?
Market price is what investors are currently willing to pay for a stock — driven by supply, demand, and sentiment. Intrinsic value is an estimate of what the stock is actually worth based on the company's fundamentals (cash flows, earnings, assets). When market price is below intrinsic value, the stock may be undervalued — this is when value investors buy. When market price exceeds intrinsic value, the stock may be overvalued.
How accurate are intrinsic value calculators?
No intrinsic value calculator is perfectly accurate because all valuations depend on assumptions about future growth, discount rates, and terminal values. A 1% change in growth rate can shift the intrinsic value by 15-25%. The value of a DCF model isn't the precise number — it's the framework for thinking about what drives a stock's worth. Always use a margin of safety and consider multiple valuation methods. Our pre-loaded data uses AI to generate reasonable base-case assumptions.