Lab Tool

Break-even ROAS / CPA Calculator

Find the maximum cost per acquisition you can afford and the minimum ROAS you need to hit your margin target.

Inputs

Revenue per conversion Required

COGS % (cost of goods sold as % of revenue)

Fixed cost per conversion (optional — fulfillment, shipping, etc.)

Target profit margin % (optional — 0 = pure break-even)

Formula Reference

Metric	Formula
Gross margin	Revenue × (1 − COGS%)
Max CPA	Gross margin − Fixed cost − (Revenue × Target margin%)
Break-even ROAS	Revenue ÷ Max CPA