Free tool · No spreadsheet · Runs in your browser
Most ROAS calculators divide revenue by ad spend and call it profit. This one subtracts cost of goods, variable costs and overhead first, so you get the number that decides whether you should scale: true net profit per order, break-even ROAS, and the target ROAS worth bidding to.
Fill in your numbers and press calculate. Three figures above are always visible; the full breakdown, benchmarks and recommendations unlock below.
Get your profit-adjusted verdict, break-even and target ROAS, blended MER, per-order profit and a prioritised list of what to fix first — plus a copyable summary you can paste into Slack or your ad account notes.
Calculating…
At your current efficiency, this is what the next $1,000 of ad spend produces.
Method
Paid ROAS is attributed revenue divided by ad spend. The number worth acting on is break-even ROAS, which is 1 divided by your contribution margin. Anything below that figure loses money on every order, however good the ROAS looks.
The calculator runs six figures, in this order:
break-even ROAS = 1 ÷ ((revenue − COGS − other variable) ÷ revenue)
A 6x ROAS on a product with a 10% contribution margin is a business in trouble. The same 6x on a 70% margin product is excellent. ROAS is efficiency; margin decides whether that efficiency turns into money. This tool always shows both, side by side.
Most spreadsheet-style calculators use a fallback chain that silently replaces a legitimate
zero with a default. Here, a zero spend is reported as zero spend, a zero fixed-cost field
gives you contribution margin rather than a divide-by-zero, and an impossible figure is
refused with an explanation instead of rendering NaN.
Measurement
Paid ROAS asks whether one channel is worth its cost. Blended MER asks whether your entire marketing engine is profitable. A brand can show a falling paid ROAS and a rising MER at the same time, because organic and brand demand are absorbing the loss.
| Dimension | Paid ROAS | Blended MER |
|---|---|---|
| Numerator | Revenue attributed to paid media | All revenue, including organic, direct and brand search |
| Denominator | Paid media spend only | Total marketing spend, including SEO, email and affiliates |
| Answers | Should I keep buying this channel? | Is the whole engine profitable? |
| Attribution risk | High. Platform-reported, self-attributing | Lower. Uses total revenue, so errors cancel out |
| Typical use | Budget allocation, campaign bids, tROAS targets | Board reporting, founder conversations, overall health |
| Falls short when | Brand terms get credited to paid, inflating paid ROAS | Fixed costs are ignored, so it looks better than the bank balance |
Read both. If paid ROAS is falling while MER is stable, you are probably paying for demand that would have arrived anyway. If both are falling, the offer or the market has moved and no amount of bid tweaking fixes it.
The number that matters
Break-even ROAS is the return at which an order exactly covers its own costs, including overhead. Multiply your target by nothing — simply take break-even and add 10–20% so the ad platform has room to bid aggressively without pushing you underwater.
Take a business with $12,000 attributed revenue, $4,000 of ad spend, $4,200 of cost of goods, $1,200 of other variable costs and $2,500 of fixed overhead.
That last line is the one most dashboards hide. A 3x ROAS, a 55% margin and a business that made $100. If that is your situation, the lever is not "improve ROAS", it is margin or volume.
| Contribution margin | Break-even ROAS | Suited to |
|---|---|---|
| 10% | 10.00x | Resale, low-price dropship |
| 20% | 5.00x | Apparel, consumables |
| 35% | 2.86x | General ecommerce, subscriptions |
| 50% | 2.00x | Digital goods, services |
| 70% | 1.43x | Software, high-ticket services |
| 85% | 1.18x | Near-pure margin businesses |
These are arithmetic identities, not industry benchmarks: break-even ROAS is a function of your margin alone.
Automated bidding systematically undershoots a target. If break-even is 1.82x, entering 1.82x produces a loss. Enter 2.0x to 2.2x and let the algorithm find volume inside your margin. Re-check monthly — if your COGS rise, break-even rises with them and your target must follow.
Diagnostics
By business type
ROAS is a revenue ratio, so its meaning is set by margin and by whether revenue is one-off or recurring. For lead generation, judge on cost per qualified lead and closed revenue per lead. For SaaS, judge on payback period and LTV:CAC, because first-order ROAS is structurally low.
Manage on contribution margin and profit per order. Watch the blended basket: a rising AOV usually helps ROAS more than a falling CPC, and it does not cost you extra reach.
Watch: discount depth, shipping subsidy, and return rates — each one moves margin without appearing in the ad platform.
Track two chains: cost per lead, and revenue per lead. A campaign with a high cost per lead can still be the cheapest source of customers if its close rate and deal size are better.
Watch: speed to lead. Contact within five minutes routinely outperforms slower response, which is a margin gain with no media cost.
First-order ROAS is a misleading headline. Manage on CAC payback period — months to recover acquisition cost — and on LTV:CAC. A 1.5x first-year ROAS can be excellent if the contract renews.
Watch: churn. Lifetime value is a promise; retention is the evidence.
Practice
Recalculating a ROAS once a quarter is why so many accounts discover problems six months late. This is the loop that keeps it current, and it takes about twenty minutes a week.
Improvement
If ROAS and volume must both hold, the lever is margin, not bids. That is why this tool leads with contribution margin rather than with a ROAS target.
Reference
FAQ
A good ROAS is the highest return you can buy before a sale stops being profitable, so it is set by your margin, not by an industry average. Divide 1 by your contribution margin to get break-even, then set your target slightly above it. A 40% margin breaks even at 2.5x; a 70% margin breaks even at about 1.43x. Any benchmark that ignores your margin is not a benchmark, it is decoration.
Break-even ROAS equals 1 divided by your contribution margin as a decimal. Contribution margin is revenue minus cost of goods sold, other variable costs and allocated fixed costs, divided by revenue. At a 35% contribution margin, break-even is 1 ÷ 0.35, or 2.86x. This calculator computes it automatically from your COGS and overhead fields.
Paid ROAS, sometimes called ad ROAS, measures only revenue attributed to paid media against paid media spend. Blended MER divides all revenue, including organic, direct and brand search, by total marketing spend. Paid ROAS answers whether a channel works. MER answers whether the whole marketing engine is profitable. Read both: paid ROAS falling while MER holds steady usually means you are paying for demand that was arriving anyway.
Because ROAS ignores cost of goods and overhead. High revenue multiplied by a strong return can still fall short once product cost, shipping, payment fees and fixed costs come out. A 6x ROAS on a 10% margin product loses money on every order, while a 3x ROAS on a 60% margin product is comfortable. This tool shows both numbers side by side so the gap is impossible to miss.
Use target ROAS bidding when your conversion tracking is dependable and your margin is stable, and give the platform a target modestly above break-even, because automated bidding undershoots. If tracking is patchy or margin swings seasonally, control costs manually and optimise toward profit per conversion instead. A tROAS campaign on unreliable tracking is a way to lose money with an excellent-looking report.
Bid to the lowest return that keeps every order profitable, which is your break-even ROAS, then add roughly 10 to 20 percent of headroom so the platform can optimise inside your margin. A business breaking even at 4x should start near 4.5x, not at the 10x an unadjusted report would suggest. Revisit the target whenever COGS move more than about two points.
Raise contribution margin first, because ROAS is margin multiplied by efficiency. Tighten the offer, raise average order value with bundles, cut shipping cost, improve landing page conversion, and move budget toward segments that already produce profitable orders. Cutting spend is the only lever that reliably lowers ROAS, which is exactly why it should be the last one you reach for.
No. Every calculation runs in your browser, and your figures are never uploaded or stored. The only data that leaves this page is what you type into the lead form, which is sent to Just Better Marketing so the report can reach you. If the server cannot be reached, the tool still calculates and clearly labels the result as unverified.
The formulas in this tool are standard definitions: ROAS is revenue over spend, contribution margin is revenue less variable cost over revenue, and break-even ROAS is the reciprocal of that margin. The break-even table is arithmetic, not a survey — those two columns move together by definition.
No industry-average ROAS figure is quoted anywhere in this page, because such averages are usually third-party, undated and derived from a sample that does not resemble your business. Where this page describes a practice — bidding below break-even, brand terms inflating paid figures, automated bidding undershooting a target — that is a widely reported practitioner pattern, and it is labelled as reasoning rather than as measured fact.
Last reviewed 2026. If you find a figure here that your own data contradicts, the data wins.
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