What is ROAS?
ROAS (Return on Ad Spend) tells you how much revenue you earn for every dollar you put into advertising. It is the single most-used number for judging whether a paid campaign is pulling its weight — on Google Ads, Meta, TikTok, Amazon, or anywhere else you buy traffic.
The formula is refreshingly simple:
ROAS = Revenue from ads ÷ Ad spend
A ROAS of 4 (you'll also see it written as 4x or 400%) means every $1 of ad spend brought back $4 in revenue. For a deeper walkthrough with platform notes and common mistakes, see our What Is ROAS? guide.
Free online ROAS calculator (in dollars)
This tool runs in your browser — no signup, no export step. Enter revenue from ads and ad spend in dollars ($); results update instantly, including break-even ROAS and gross profit after ad spend once you add your margin. Share a link with your inputs encoded in the URL for quick reviews with a client or media buyer.
How to calculate ROAS (worked example)
Say you ran a Meta campaign that cost $1,000 and generated $5,000 in attributed sales:
- Take the revenue the campaign drove: $5,000.
- Divide it by what you spent: $5,000 ÷ $1,000 = 5x.
So far so good — but here's the trap most dashboards hide: raw ROAS ignores your product costs. If your gross margin is 60%, only $3,000 of that $5,000 is gross profit before ads. After subtracting the $1,000 spend, your real gross profit is $2,000. That's the number that actually lands in your pocket, and it's why this calculator asks for your margin.
Same revenue, different margin — why "5x" can mislead
Two stores both hit 5x ROAS on $2,000 spend and $10,000 revenue:
| Store | Gross margin | Gross profit before ads | After $2,000 ad spend | Verdict |
|---|---|---|---|---|
| Digital product | 80% | $8,000 | $6,000 | Strongly profitable |
| Apparel reseller | 30% | $3,000 | $1,000 | Profitable, but thin |
Same headline ROAS, very different outcomes. Always pair ROAS with margin — or use the target ROAS calculator to find your minimum profitable ROAS before you scale spend.
What is a "good" ROAS? It depends on your break-even
There is no universal "good" ROAS — a 3x can be wildly profitable for a digital product and a money-loser for a low-margin reseller. What matters is whether you clear your break-even ROAS, the point where ad-driven gross profit exactly covers ad spend:
Break-even ROAS = 1 ÷ gross margin
At a 60% margin you need roughly 1.67x just to avoid losing money; at a thin 25% margin you need 4x before you see a cent of profit. This tool draws that line for you, so you instantly know whether a campaign is genuinely profitable — not merely "positive".
ROAS by channel (quick context)
Platforms report ROAS differently, but the math is the same:
- Google Ads: Search and Shopping often show 3x–6x+ for high-intent campaigns; use the same revenue ÷ spend formula. Shopping ROAS is only meaningful if product margins support it.
- Meta (Facebook & Instagram): Ads Manager reports ROAS as purchase value ÷ spend. Typical prospecting runs ~2x–4x; retargeting often higher. A 7-day click + 1-day view window can inflate Meta ROAS vs. your Shopify totals — compare to blended ROAS before scaling.
- Amazon: sellers often think in Amazon ACOS (spend ÷ revenue); 25% ACOS = 4x ROAS.
- Blended accounts: if you run Google, Meta, and email together, use the blended ROAS calculator so one strong channel does not mask a weak one.
Ecommerce & dropshipping ROAS
Ecommerce brands often target ~4x+ ROAS on paid social — but only if margin supports it. At 50% gross margin, break-even is 2x; at 30% (common for apparel), break-even is ~3.33x.
Dropshipping usually has thinner margins once you include product cost, payment fees, and often subsidized shipping. A 4x ROAS headline can still lose money at 25% margin (break-even 4x). Enter your real margin above; if ads look good on platform ROAS but gross profit after ad spend is negative, fix offer economics before raising budget.
For the minimum ROAS to bid in Google Ads, use the dedicated target ROAS calculator after you know break-even from this page.
Break-even ROAS — built in
You do not need a separate break-even ROAS calculator for the core math: enter margin and this page outputs break-even ROAS (1 ÷ margin) alongside your live ROAS. For a profit buffer above break-even — what to enter as target ROAS in Google or Meta — see the target ROAS calculator.
How to improve a weak ROAS
If you're below target, the lever isn't always "spend less." The usual wins: tighten audience and keyword targeting to cut wasted spend, raise average order value (bundles, upsells) so each sale carries more revenue, improve landing-page conversion rate, and cut the cost of your worst-performing creatives. Because ROAS is revenue ÷ spend, you can move it from either side of the equation.
Pair ROAS with CAC and LTV:CAC when you care about whether new customers — not just attributed revenue — are worth acquiring.
Not sure which metric to use?
See ROAS vs Marketing ROI for when to use ROAS, when to use marketing ROI, and why a high ROAS can still mean low profit. Selling on Amazon? See also ACOS vs ROAS.