· Tools ·
Free calculators for Shopify operators.
No signup, no CSV uploads to a server. Built by an agency that runs the same models on its own clients' P&Ls every week.
01
CM3 Contribution Margin
Live · No signup
Plug in your monthly numbers and see CM1, CM2, CM3, ROAS, MER, and net margin — with Shopify benchmarks. Updates live as you type.
Why it matters
- Spot whether you're scaling on profitable orders or just buying revenue
- Quantify the margin impact of every cost line
- Email yourself a printer-friendly PDF for your next P&L review
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02
Max CAC Arbitrage
Cohort-driven · Real LTV
Upload your Shopify cohort export. We compute your real lifetime orders per customer and your acquisition ceiling — at any payback window, with any profit floor.
Why it matters
- Set acquisition budgets from your data, not gut feel
- See your absolute breakeven CAC and your profit-protected ceiling
- Compare against your current CAC to size your headroom for scaling
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