This free cash flow calculator computes the cash a business truly has left over: operating cash flow minus the capital expenditures needed to maintain and grow the asset base. FCF is the money that can service debt, pay dividends, fund buybacks or pile up as optionality — the figure valuation is actually made of, once accounting opinions are stripped away.

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The Cash That’s Actually Yours

Net income is an opinion; free cash flow is closer to a fact. Earnings include non-cash charges (depreciation), accrual timing, and a gallery of managerial judgments. FCF returns to the cash register: start from the operating cash flow the business actually generated, subtract the capital spending required to keep the machine running (and growing), and what remains is discretionary in the truest sense — it can retire debt, fund dividends and buybacks, bankroll acquisitions, or simply accumulate. This is why discounted-cash-flow valuation discounts FCF, not earnings: you cannot spend an accrual.

The capex question is where FCF analysis earns its keep. Split capex mentally into maintenance capex (the treadmill — replacing what wears out, non-negotiable) and growth capex (the expansion — discretionary, future-dated). Reported FCF subtracts both, which punishes fast growers in the headline number while their spending is actually buying future cash flows. Analysts estimating “owner earnings” (Buffett’s preferred refinement) subtract only maintenance capex; when a company’s depreciation persistently exceeds its capex, someone is underinvesting and borrowing from the future — the gap shows up years later as failing plant and emergency spending.

Worked Example (Verified)

  • Operating cash flow $800k, capex $300k (defaults): FCF = $500k — a 62.5% cash conversion, $0.50 per share on 1M shares, and a 5.0% FCF yield against a $10M market cap. That yield is directly comparable to the P/E’s earnings yield (and usually the sterner, more honest of the two).
  • The profitable cash-bleeder: net income +$400k but receivables ballooning and $700k of forced capex can print FCF of −$300k in the same year — growth consuming cash faster than operations mint it. Neither figure is lying; they are answering different questions, and lenders ask the FCF one.
  • The conversion quality test: five years of FCF/OCF at 60–80% signals a machine; a sawtooth between 90% and −20% signals capex cycles — read the average, not the year.

FCF in Valuation and Capital Allocation

A company’s intrinsic value, in the DCF frame, is its future FCF discounted back — which makes this simple subtraction the seed of essentially all fundamental valuation. FCF yield (FCF ÷ market cap) is the quick screen version: at 5% the market prices the company at 20× its current free cash (the exact inverse of a 20 P/E, but in cash); comparing FCF yield to the ~4–5% available on long government bonds frames the equity risk premium a buyer is being paid. For management, FCF is the budget constraint behind every capital-allocation decision; for creditors, FCF after interest is the debt-service reality behind the ratios.

One structural warning: stock-based compensation is a real cost that the standard FCF definition treats as free (it’s non-cash, added back in operating cash flow, and never appears in capex). Companies paying staff heavily in shares can show glorious FCF while diluting owners steadily — sophisticated readers subtract SBC or track FCF per share over time, which nets the dilution against the cash directly. The per-share output here exists for precisely that discipline.

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Frequently Asked Questions

How do you calculate free cash flow?

FCF = operating cash flow − capital expenditures. With OCF of $800,000 and capex of $300,000, FCF = $500,000. Both inputs live on the cash flow statement (capex inside investing activities). A second, equivalent route starts from EBIT: FCF = EBIT×(1 − tax rate) + depreciation & amortization − capex − change in working capital — useful for forecasts, where the direct statement doesn’t exist yet. This calculator takes the direct route and adds per-share and yield views.

Why is free cash flow more trusted than net income?

Because it’s much harder to dress up. Net income absorbs accrual choices — revenue recognition timing, depreciation schedules, reserve releases — while operating cash flow counts what arrived, and capex counts what left for long-lived assets. A company can report rising profits while its cash drains into receivables and inventory; FCF shows the drain in the same period. It isn’t manipulation-proof (capex can be deferred, payables stretched at period end), which is why analysts read it over multi-year windows where the tricks unwind.

What is FCF yield?

Free cash flow divided by market capitalization — the cash return the whole company generates relative to what the market charges for it. Our example: $500k/$10M = 5.0%. It’s the inverse of the price/FCF multiple and comparable across companies and against bond yields: a 5% FCF yield against a 4.5% Treasury says the market prices this business as barely riskier than the government, which is either a compliment to its durability or a warning about its growth.

What is a good FCF conversion rate?

FCF ÷ operating cash flow above roughly 70% sustained marks a light-asset, cash-compounding model (software, services); 40–70% is normal industrial territory; persistently below 30% means the asset base taxes operations heavily (utilities, telecom, heavy manufacturing live here legitimately). Compare within the industry’s capex physics, and over at least a full capex cycle — a single year of low conversion during a plant build is investment, not pathology.

FCF vs EBITDA — what’s the difference?

EBITDA approximates operating performance before capital structure, taxes and non-cash charges — but it also pretends capex and working capital don’t exist. FCF is what remains after those very real cash costs. A business can post fat EBITDA while FCF runs negative for years (airlines in expansion, shale drillers) — the gap is precisely the capital intensity EBITDA hides. Debt covenants often key on EBITDA; equity value keys on FCF; knowing which game you’re in matters.

Can free cash flow be negative for a healthy company?

Yes — during deliberate, high-return buildouts: a retailer opening fifty stores, a software firm pre-building data centers, a manufacturer adding a plant ahead of contracted demand. Negative FCF is a diagnosis prompt, not a verdict: the questions are whether the capex earns above the cost of capital, whether the balance sheet funds the gap safely, and whether management’s past capex promises materialized. Chronic negative FCF without those answers is a business consuming its owners.

What about free cash flow to equity (FCFE)?

FCFE refines FCF for shareholders specifically: FCF − interest×(1 − tax) + net borrowing = the cash available to equity after debtholders are served. Levered firms show FCFE ≠ FCF meaningfully; unlevered firms show them identical. Dividend sustainability is properly judged against FCFE (paying dividends from borrowed money shows up as dividends > FCFE), while enterprise valuation uses the unlevered FCF here. This calculator computes the enterprise figure; subtract after-tax interest and add net new borrowing for the equity view.

Is this free cash flow calculator free?

Yes — free, instant, no sign-up. Enter operating cash flow and capex for FCF, with per-share and FCF-yield readouts when you add share count and market cap.