Compute return on ad spend from revenue and cost — know every dollar's payback. Prove 4:1 ROAS before scaling — free, local, no signup.
Compute CAC payback months — how fast customers repay acquisition cost. Prove 12-month payback to investors — free, local, no signup.
Compute cost per mille for ad campaigns — compare display, video, and social CPMs. Judge a $12 CPM against returns — free, local, no signup.
Compute monthly burn and runway from starting balance, ending balance, and months elapsed. Know exactly how many months remain — free, local, no signup.
Compute gross margin from revenue and costs — know exact profitability. A $30 sale at $20 cost margins 33% — free, local, no signup.
Measures return on investment by comparing net gain or loss against the original cost, expressed as both a percentage and a dollar amount. Essential for marketing campaign evaluation, equipment purchase decisions, real estate investment analysis, and comparing investment opportunities.
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 measures channel efficiency; MER (total revenue ÷ total ads) measures business efficiency. Scale on MER, optimize on ROAS.
Last-click overcredits branded search; view-throughs inflate display. Triangulate with holdout tests before big shifts.
No — math runs locally in your browser. Figures never leave your device.
Last updated October 2026