ToolNest

Target ROAS Calculator

"What's a good ROAS?" has no number answer without your margin, because ROAS compares revenue to spend while revenue is not the money that pays for ads — margin is. A 40%-margin business at a 250% ROAS is exactly break-even; the 800% ROAS screenshot from a revenue-margin business can be losing money per order. This calculator works from the only base that funds advertising: it converts your gross margin into a break-even ROAS, then adds your profit goal per order to produce the target ROAS to set in the ad platform, the ad-spend allowance per order it implies, and — from your conversion rate — the maximum CPC that still clears the target. It is the same discipline our LTV calculator applies to lifetime value: percentages quoted against revenue flatter the business; percentages quoted against margin fund it.

The short answer

Break-even ROAS is 1 ÷ gross margin — a 40% margin business breaks even at 2.5× (250%), not at the 800% screenshots that float around. To keep $20 profit per order on a $120 AOV at that margin, the target is about 4.3×, which allows $28 of ad spend per order and a max CPC near $0.56 at a 2% conversion rate.

Revenue minus cost of goods — the only base that can pay for ads. Margin on revenue is the classic misread.

What each ad-driven order should clear after the ad. $0 gives the break-even ROAS itself.

Orders ÷ clicks — turns the target into a max CPC.

Break-even ROAS

250%

Revenue ÷ ad spend where the order stops losing money — 1 ÷ 0% margin. Any reported ROAS below this is a loss, whatever the dashboard says.

Target ROAS for your profit goal
429%

$20.00 profit per order needs $28.00 of ad spend against a $120.00 order — that ratio is the tROAS to set.

Max CPC at the target
$0.56

Clicks cost more than this only if they convert better than your rate — everything above is margin for bidding, not for profit.

How to use Target ROAS Calculator

  1. 1

    Enter your gross margin

    Revenue minus cost of goods, as a percent of revenue. This is the base that pays for ads — if you only know markup, convert it first (a 67% markup is a 40% margin).

  2. 2

    Add your AOV and profit goal per order

    The goal is what each ad-driven order should clear after the ad itself — $0 returns the break-even ROAS as the target.

  3. 3

    Set the tROAS and read the CPC ceiling

    Set the platform's target ROAS to (or slightly above) the calculated figure; the max CPC shows what a click can cost at your conversion rate before the target breaks.

Why use this tool

  • Break-even ROAS from gross margin — the floor every target must clear
  • Target ROAS that leaves your actual profit goal per order
  • Ad-spend allowance per order implied by the target
  • Max CPC from your conversion rate — a bidding ceiling, not a guess
  • Flags profit goals the margin cannot fund instead of returning a number
  • Private — margins and goals never leave the browser

Frequently asked questions

What is a good ROAS?
One that clears your break-even: 1 ÷ gross margin. A 40% margin business breaks even at 2.5× (250%); a 25% margin business needs 4× just to stand still. Any ROAS figure — 300%, 800% — is meaningless until it is compared against that floor, which is why screenshots of other accounts' ROAS tell you nothing.
How do I calculate break-even ROAS?
Divide 1 by your gross margin as a decimal. At a 40% margin, 1 ÷ 0.40 = 2.5 — every order needs $2.50 of revenue per $1 of ad spend just to cover the product and the ad. The formula is definitional: at break-even, margin per order equals ad spend per order.
How do I set a target ROAS that keeps profit?
Subtract your profit goal from the margin, then invert: at a 40% margin on a $120 order keeping $20 profit, ad spend is $48 − $20 = $28, so the target is $120 ÷ $28 ≈ 4.3. Set the platform's tROAS there. The calculator does the subtraction explicitly so the profit goal is a decision, not an accident.
Why is my high ROAS still losing money?
Because the ROAS is measured against revenue while the business pays costs out of margin. An 800% ROAS on a 10% margin order still leaves the order underwater: break-even for that margin is 10×. This is the revenue-versus-margin confusion — the same one that inflates LTV — and it is why this calculator refuses to quote a target until it knows the margin.
What max CPC does a target ROAS allow?
Max CPC = AOV ÷ tROAS × conversion rate. At a $120 AOV, a 4.3 target and a 2% conversion rate, a click can cost about $0.56 before the target breaks. The number moves with the conversion rate — a site that converts at 4% can bid twice as much for the same economics.
Does this work for Smart Bidding / tROAS campaigns?
Yes — the calculated figure is exactly what the platform's target-ROAS field asks for. Two cautions from the Google Ads rules: Smart Bidding needs roughly 30 conversions a month before its decisions mean anything, and a tROAS set above what the margin funds will not fail loudly — it will simply throttle delivery to the few orders that clear it.
Is this the same as a margin calculator?
Related but reversed. The margin tools here (profit margin, markup) work from cost and price; this one takes the margin as given and answers the advertising question — how much can an order cost to acquire before the margin says no. For lifetime economics including retention, use the LTV calculator.

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