Open the calculator → Pairs directly with Break-Even ROAS, Explained.
What it calculates
Enter your sale price and your contribution margin before ad spend (or the inputs to derive it — landed cost and fee/fulfillment cost), and it returns your break-even ROAS: the point at which ad spend stops being profitable per sale. It also supports adding a target profit buffer above break-even, so you get a realistic target ROAS to set campaigns against — not just the bare floor.
Why to calculate this before setting campaign targets
Setting an advertising target ROAS without first calculating your own break-even point means judging campaign performance against a generic benchmark that may have nothing to do with your actual margin structure — see Break-Even ROAS, Explained for the full reasoning and worked examples.
Use it per SKU or SKU group
Different products in your catalog can have very different break-even ROAS numbers depending on their margin structure — run this calculator for each meaningfully different SKU or margin tier rather than applying one blanket target across an entire ad account.