ROAS Calculator
Calculate ROAS (Return on Ad Spend), ad ROI, and break-even ROAS. Find out if your ad campaigns are profitable after COGS and ad spend.
Reviewed for accuracy by Marcus Webb and the Blueprint Dynamics editorial team (last updated July 2026). Our calculators use primary-source formulas and are cross-checked against IRS publications, Fannie Mae guidelines, and Federal Reserve data. Learn more about our methodology.
Return on Ad Spend = Revenue from Ads ÷ Ad Spend
ROAS
5.00x
Strong
Ad ROI
400.0%
Gross Profit
$13,000
Net After Ad Spend
$8,000
Break-Even ROAS
1.92x
MER (Marketing Efficiency Ratio): 20.0% of revenue spent on ads. Industry benchmark for ecommerce: 10–20%.
What ROAS measures and what it doesn't
Return on Ad Spend (ROAS) is the ratio of revenue generated to dollars spent on advertising: ROAS = Revenue / Ad Spend. A ROAS of 4.0x means you generated $4 in revenue for every $1 spent. It's the most commonly reported paid media metric, used by Google Ads, Meta Ads, and most ad platforms as their primary efficiency indicator. However, ROAS is a revenue metric, not a profitability metric — and confusing the two is one of the most expensive mistakes in digital marketing.
Break-even ROAS — the number that actually matters
Break-even ROAS is the minimum ROAS at which you recover your ad spend without losing money on gross margin. The formula is: Break-even ROAS = 1 / Gross Margin. If your product has a 40% gross margin, you break even at 2.5x ROAS (1 / 0.40). If ROAS falls below 2.5x, you're losing money on every ad-driven sale even before counting overhead. At a 25% gross margin, you need 4.0x ROAS just to break even on variable costs — any ROAS below that destroys margin.
To calculate your target profitable ROAS, account for all variable costs associated with a sale: cost of goods, payment processing fees (typically 2.9% + $0.30), return/refund rate, customer service allocation, and shipping. Subtract these from revenue to get the true contribution margin, then apply the break-even formula to that margin.
ROAS vs. MER vs. ROI
ROAS (Return on Ad Spend) measures revenue per ad dollar for a specific campaign or channel. MER (Media Efficiency Ratio) measures total revenue divided by total ad spend across all channels — a blended view that accounts for the halo effect of brand advertising on other channels. ROI (Return on Investment) measures net profit divided by total investment including non-ad costs. For scaling decisions, MER is often more useful than channel-level ROAS because it captures cross-channel attribution that last-click ROAS misses.
Why reported ROAS overestimates true ROAS
Ad platforms attribute revenue using their own attribution models — typically last-click or data-driven within a 7-day click / 1-day view window. This systematically overcounts conversions because: (1) the same purchase may be attributed to multiple channels simultaneously; (2) view-through attribution credits ad impressions even if the customer would have purchased anyway; (3) returns and cancellations are not deducted in real time. True incremental ROAS — measured via conversion lift studies or geographic holdout tests — is typically 20–40% below reported ROAS for mature paid social campaigns.
Benchmarks by industry
Average reported ROAS benchmarks by sector: ecommerce (general) 3–5x. Fashion and apparel 4–6x. Beauty and skincare 4–7x. Home goods 3–5x. Software/SaaS 3–8x (higher margins justify lower revenue ROAS). Direct-to-consumer food/beverage 2–4x. These are averages — your break-even ROAS is the only benchmark that actually matters for your business.