What is a good LTV to CAC ratio?

The widely used benchmark is 3:1 — a customer's margin-adjusted lifetime value should be at least three times what it cost to acquire them. Below 1:1 you lose money on every customer; between 1 and 3 the economics are fragile; well above 5 often means you're underspending on growth. Always compute LTV on gross margin, not revenue.

What ROAS do I actually need to be profitable?

Your breakeven ROAS is 1 divided by your gross margin. At 50% margin you need 2.0x just to break even on media — before management fees and overhead. A "3x ROAS" that sounds healthy is barely profitable at 40% margin. This is why revenue ROAS flatters and margin math decides.

What is the difference between CPL, CPA, and CAC?

CPL is cost per lead (any hand raised), CPA is cost per whatever action you defined (often a form fill or purchase), and CAC is cost per acquired customer — the only one of the three that touches revenue. Funnels leak between each step, so a healthy CPL can hide a fatal CAC; calculate all the way through.

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The ad economics calculator that tells you what to do about it.

Anyone can divide spend by leads. This models your whole funnel — lead gen or direct ecommerce sales — then computes the two things a calculator can't: the most you can afford to pay at every stage, and which lever actually moves your numbers.

First time here? Read the walkthrough — the full ROAS, CAC & LTV math with a worked example.

How does your funnel work?

Spend

Monthly ad spend Media only — what the platforms bill.

Monthly management + tooling (optional) Agency fees, software, landing pages — the real cost of running ads.

Funnel numbers

Monthly clicks (optional) Adds CPC and a max-bid ceiling to the outputs.

Click → purchase conversion % Your site conversion rate on paid traffic.

Monthly leads Form fills, calls, chats — hands raised.

Lead → booked call % Demos, appointments, sales calls — the conversations stage.

Close % Of booked calls if that stage exists — otherwise of leads.

Revenue

How does a customer pay you?

Average revenue per new customer For ecommerce: average order value. If customers repeat, use Recurring — or bump this to lifetime revenue.

Gross margin % What’s left after delivering — ecommerce often 20–50%, services 30–60%, software 70–90%. Revenue math without margin is fiction.

Your bar

Target LTV:CAC — 3:1 is the standard bar; raise it if cash is tight.

Sample read — start typing and your numbers take over.

Sample — a lead-gen funnel at $10k/mo. Yours replaces it as you type.

How to read your results

Three things on the results panel matter more than everything else — here's how to act on each.

① The verdict

Your margin-adjusted LTV:CAC in plain English. Under 1:1, every acquisition loses money — scaling makes it worse. 1–3 works but has no cushion. 3–5 is the healthy zone. Above 5 usually means you could profitably spend more.

② Your ceilings

The calculator run backwards: the most you can afford to pay per click, lead, call, and customer at your target ratio. If your ad platform's target CPA sits above your max CAC here, it's optimizing you toward losses.

③ Your biggest lever

Realistic improvements — a few conversion points, modestly cheaper media, a pricing bump — ranked by real effect on your economics. Weak close rate? Fix sales before budgets. Strong funnel? Push spend.

What is a good LTV:CAC ratio?

The standard bar is 3:1 — margin-adjusted lifetime value at least three times acquisition cost. Where your number lands:

Under 1:1	Losing money on every customer — you pay for the privilege of acquiring them. Stop scaling; fix the funnel or the pricing first.
1:1 – 3:1	Working but fragile — profitable on paper with no margin for error. One bad month of close rates puts you underwater.
3:1 – 5:1	The healthy zone — the machine works. The question shifts from "should we spend" to "how fast can we scale without breaking it."
Above 5:1	Counterintuitively, often underspending — economics this strong usually mean growth is available for the buying.

What ROAS do you actually need?

Your breakeven ROAS is 1 ÷ gross margin — the number platform dashboards never mention when they celebrate your "3x":

Gross margin	Breakeven ROAS	So a "3x ROAS" is…
20%	5.0x	a serious loss
30%	3.3x	a loss
40%	2.5x	a thin win
50%	2.0x	a modest win
60%	1.7x	a solid win
80%	1.25x	a strong win

Margin math decides; revenue math flatters. Every ROAS target should be set relative to your breakeven — the calculator above does it automatically, before whoever manages the ads has been paid.

CPL, CPA, CAC, ROAS — untangled

The funnel leaks between every step — which is why a lovely CPL can coexist with a fatal CAC. Here's the sample funnel from the panel above, priced at each stage:

CPL	Prices a hand raised — form fill, chat, call. Can look great while the business loses money; leads aren't revenue.
Cost per booked call	Prices a real conversation — the metric most service businesses should manage to, because it's where lead quality shows.
Cost per order	The ecommerce equivalent of CAC: spend ÷ orders. Pair it with AOV and margin, or it means nothing.
CAC	Prices an actual customer — and the fully-loaded version (media + management + tooling) is the only honest one.
ROAS	Compares revenue to spend — useful, flattering, and meaningless without margin.

Calculate all the way through, every time — and then wire your CRM so the calculation runs itself.

Every term on this page, defined

The cost side — what you pay to acquire:

ROAS	Revenue attributed to ads ÷ ad spend. A 4x ROAS means $4 of revenue per $1 of spend. Flattering by design: it ignores margin and everything you pay beyond media.
Breakeven ROAS	1 ÷ gross margin — the ROAS at which you made nothing. At 40% margin, breakeven is 2.5x; a "3x ROAS" is a thin win, not a triumph.
CPC	Ad spend ÷ clicks. The price of attention, not of results — useful mainly as the top of the chain and as a max-bid ceiling.
CPL	Ad spend ÷ leads. A lead is any hand raised: form fill, chat, call. CPL can look great while the business loses money.
CPA	Ad spend ÷ whatever action you defined — the catch-all term ad platforms use. Always ask "per what, exactly?"
Cost per booked call	Ad spend ÷ sales conversations that actually happened — where lead quality reveals itself.
Cost per order	Ad spend ÷ orders — ecommerce's CAC.
CAC	Total acquisition spend ÷ new customers. Media-only counts just the platforms; fully-loaded adds management and tooling — the number your P&L feels, and the one this calculator judges you on.

The value side — what a customer is worth:

AOV	Revenue ÷ orders — ecommerce's "revenue per customer" in this calculator. If customers repeat, model recurring revenue or use lifetime revenue instead of first-order AOV.
Conversion rate	The percentage advancing at each funnel step. Small changes here beat large budget changes surprisingly often — that's what the lever section measures.
Gross margin	Revenue left after delivering, before overhead. Every revenue figure in ad math should be multiplied by it — almost none are.
LTV	Total revenue over the customer relationship. For recurring: monthly value × months retained. This calculator uses margin-adjusted LTV — you can't pay for ads with revenue you spent delivering.
LTV:CAC ratio	Margin-adjusted lifetime value ÷ fully-loaded acquisition cost — the single number that says whether growth creates or destroys value. The bar is 3:1.
CAC payback	Months of a customer's margin needed to earn back their acquisition cost. The cash-flow lens: great LTV:CAC with a 30-month payback can still starve you.
Churn & retention	Churn is the share leaving each month; retention its mirror. Lifetime in months ≈ 1 ÷ monthly churn — 4% churn ≈ 24 months.

More free tools: UTM Generator · Zendesk Plan Finder · HubSpot Plan Finder · Template Library · All free tools

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