ROAS Calculator
Calculate Return on Ad Spend (revenue ÷ ad spend) with profit, ACOS, and platform benchmarks.
Campaign Numbers
Related Metrics
ACOS is the inverse of ROAS, expressed as a percentage of revenue spent on advertising — useful for Amazon Ads and other platforms that report cost-of-sale instead of a spend-to-revenue ratio.
Platform Benchmarks
Commonly-cited averages — tap one to preview the revenue that ratio implies for your current ad spend.
How ROAS works
Return on Ad Spend (ROAS) measures how much revenue you earn for every unit of currency spent on advertising: ROAS = Revenue ÷ Ad Spend. A ROAS of 4:1 means every $1 spent returned $4 in revenue. Unlike ROI, ROAS uses gross revenue rather than net profit, so it doesn't account for product cost, fulfillment, or overhead — a campaign can show a healthy ROAS and still be unprofitable once those costs are factored in.
A ROAS above 1:1 means the campaign generated more revenue than it cost; exactly 1:1 is break-even; below 1:1 means the ad spend lost money before accounting for margin. ACOS (Advertising Cost of Sale) is the same relationship inverted and shown as a percentage — ACOS = (Ad Spend ÷ Revenue) × 100 — and is the metric Amazon Ads and some other platforms report natively. All calculations run locally in your browser; nothing is uploaded.
Private & free — this tool runs entirely in your browser.