Valuation Guide

    DCF Calculator: How to Value a Stock with Discounted Cash Flow

    A discounted cash flow (DCF) calculator turns a company's future free cash flows into a present-day fair value. This guide walks through the formula, the inputs that matter, and how to use Value Snapshot's built-in DCF tool to value any stock in seconds.

    Open the DCF Calculator Run on any ticker

    What is a DCF calculator?

    A DCF calculator estimates a stock's intrinsic value by projecting the cash the business is expected to generate over the next 5–10 years, then discounting those cash flows back to today. The intuition: a dollar earned five years from now is worth less than a dollar today, because today's dollar can be reinvested at your required rate of return.

    DCF is the workhorse of equity research because it forces you to make your assumptions explicit: how fast will the business grow, what return do you demand, and what is the business worth at the end of the forecast?

    The DCF formula

    Fair Value = Σ [ FCFₜ / (1 + r)ᵗ ] + [ Terminal Value / (1 + r)ⁿ ]

    • FCFₜ — projected free cash flow in year t
    • r — discount rate (your required return, often WACC)
    • n — final year of the explicit forecast
    • Terminal Value — FCFₙ × (1 + g) / (r − g), where g is the terminal growth rate

    Divide the resulting enterprise value by shares outstanding to get a per-share fair value you can compare to the current price.

    The four inputs that matter most

    Starting free cash flow

    Use trailing-twelve-month (TTM) free cash flow as the base. Value Snapshot pulls this automatically from the latest filings.

    Growth rate

    Anchor on the company's 3–5 year historical FCF growth, then taper it toward the long-run economy. Mature businesses settle near 2–4%.

    Discount rate

    Your required return. 8–12% is the common retail-investor range. 10% is a useful default — it asks the stock to beat the S&P 500.

    Terminal growth

    The perpetual growth rate after the forecast period. Keep this at or below long-run GDP growth (2–3%) to avoid implausible valuations.

    How to use the Value Snapshot DCF calculator

    1. Open any stock page (try AAPL, MSFT, or NVDA) and switch to the Valuation tab.
    2. The DCF model auto-runs with TTM free cash flow and conservative defaults.
    3. Adjust the growth rate, discount rate, and terminal growth sliders to match your thesis.
    4. Read the Valuation Verdict: green means the price is below your fair value (margin of safety), red means it is above.
    5. Stress-test by halving your growth assumption — if it still looks cheap, the conviction is real.

    Interpreting the fair value

    DCF is a sensitivity exercise, not a crystal ball. A single fair-value number depends entirely on the inputs you chose. The point isn't to land on the "right" answer — it's to understand what assumptions the current market price already implies, and decide whether you believe them.

    Value Snapshot color-codes the margin of safety so you can scan the result at a glance, and caps extreme upside displays at ±150% to keep the verdict useful even when the model gets aggressive.

    Frequently asked questions

    What is a DCF calculator?

    A DCF (Discounted Cash Flow) calculator estimates the present-day fair value of a stock by projecting its future free cash flows and discounting them back to today using a required rate of return. It is the most widely used intrinsic-valuation method in equity research.

    What inputs does a DCF model need?

    At minimum you need a starting free cash flow (typically trailing twelve months), a growth rate for the projection period (usually 5–10 years), a terminal growth rate, a discount rate (WACC or required return), and shares outstanding to convert enterprise value into a per-share fair value.

    What is a good discount rate to use?

    Most retail investors use 8–12% as a required return. 10% is a common default — it roughly matches the long-run total return of the S&P 500, so anything valued at that rate is being asked to beat the index.

    How do I pick a growth rate?

    Anchor on the company's historical revenue and free-cash-flow growth, then taper toward sector averages. Value Snapshot prefills conservative TTM-derived growth and caps it at 25% to prevent runaway projections.

    What does the fair value tell me?

    Compare the per-share fair value to the current price. If fair value is well above price, the stock has a margin of safety. If it is below, the market is pricing in more growth than your assumptions support.

    Try the DCF calculator on any stock

    Value Snapshot ships with DCF, EPS, PEG, and Rule-of-40 models that auto-run with TTM data — adjust the assumptions and the verdict updates instantly.

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