ROAS Calculator
Compute return on ad spend from revenue and cost — know every dollar's payback. Prove 4:1 ROAS before scaling — free, local, no signup.
How to Use the ROAS Calculator
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Frequently Asked Questions
What ROAS is good?
4:1+ healthy for most e-commerce (25% ad cost); 2:1 survives on high margins only. Know your breakeven ROAS (1 ÷ margin) first. The tool shows ROAS plus net profit with 4 presets (Google Ads $5,000/$1,000, Facebook $3,000/$800, Influencer $12,000/$2,000, Email $8,000/$500) and a 10-entry history with CSV export.
ROAS vs MER?
ROAS measures channel efficiency; MER (total revenue ÷ total ads) measures business efficiency. Scale on MER, optimize on ROAS.
Attribution caveats?
Last-click overcredits branded search; view-throughs inflate display. Triangulate with holdout tests before big shifts.
Is spend data uploaded?
No — math runs locally in your browser. Figures never leave your device.
Last updated October 2026