ROAS Calculator — Return on Ad Spend & Break-Even
Calculate ROAS from ad spend and revenue — plus your true break-even ROAS once margin is factored in.
Last reviewed 2026-10-18. Rates change — verify against the official sources linked below before relying on these figures.
What this is based on
- ROAS = revenue ÷ ad spend. Break-even ROAS = 1 ÷ gross margin.
- Refunds, platform fees and agency fees are not included — subtract them from margin for the strictest number.
Why a 3x ROAS can still lose money
ROAS counts revenue, not profit. A 3x ROAS on a product with 30% margin means each $1 of ads returns $3 of revenue but only $0.90 of gross profit — you're losing 10 cents per dollar spent while the dashboard celebrates. The only ROAS that matters is the one relative to your margin.
The fix is one division: break-even ROAS = 1 ÷ margin. At 40% margin you need 2.5x just to tread water; at 25% margin, 4x. Most accounts judged 'profitable' at 3x are silently unprofitable on low-margin products.
Platform ROAS is inflated — blend your own
Meta and Google report attributed revenue generously: view-through conversions, existing customers, brand searches all get credited. Your real ROAS is total revenue change ÷ spend, which is why experienced advertisers run weekly blended (MER) numbers alongside the platform dashboards.
The levers when ROAS is short of break-even
Four moves: raise prices (margin up, break-even ROAS down), raise AOV (bundles, upsells — same clicks, more revenue), cut CPA (better creative, tighter audiences), or accept sub-breakeven short-term if LTV pays it back — subscription and repeat-purchase models can run 'unprofitable' first-order ROAs profitably. But only if you actually measured LTV, not vibes.
Frequently asked questions
- What is a good ROAS?
- Anything above your break-even ROAS (1 ÷ margin). At 40% margin that's 2.5x; at 60% margin, 1.67x. 'Good' is relative to your margin, not an industry number.
- How is ROAS calculated?
- ROAS = revenue attributed to ads ÷ ad spend. $4,000 revenue on $1,000 spend = 4x ROAS.
- ROAS vs ROI — what's the difference?
- ROAS measures revenue per ad dollar; ROI measures profit after all costs. ROAS ignores margin — a 4x ROAS on 20% margin still loses money.
- Why does Meta show higher ROAS than my bank account?
- Attribution inflation: view-through conversions, repeat customers and brand searches all get credited to ads. Compare platform ROAS to blended revenue lift for the truth.
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