Margin Ruler

Break-Even Ad Spend Calculator

Given product margin, average order value, target ROAS, and conversion rate, this calculator returns true-ROAS CPA, profit-safe max CPA, break-even ROAS, …

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Published fee inputs, dated assumptionsNo account or emailPrivate unless you save
Methodology

Break-Even Ad Spend Calculator. Computes true-ROAS CPA from revenue ÷ ad spend, then caps max CPA at gross-profit break-even when the target ROAS is below break-even.

Fee basis: source-state planning estimate; modeled fee basis is under review and not a Seller Central reconciliation. Last source-state review: 2026-06-07.

Read the formula, inclusions, exclusions, and fee-category audit →

Calculator
Inputs
Enter your operating figures for a planning estimate based on published rate cards and industry midpoints.
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Result
Fill in your operating figures above to get a planning estimate.

Break-Even Ad Spend Calculator

Use this Break-Even Ad Spend Calculator tool to estimate costs and plan next steps. This hub explains how to use the tool, what affects estimates, and where to go next. Below are the most common drivers people see for this kind of job.

What typically drives the estimate

  • Gross margin per order (after COGS, fees, shipping)
  • Average order value and repeat-purchase rate
  • Current conversion rate from ad click to purchase
  • Target return-on-ad-spend (ROAS) or payback window

Related pages

Disclosure: Affiliate disclosure: We may earn a commission when you engage a vendor through links on this site. This does not affect the price you pay or the cost estimates shown, which are calculated independently of vendor relationships. Calculator results are planning estimates only — not financial guarantees.

Canonical: https://www.marginruler.com/tool/break-even-ad-spend-calculator/

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Break-Even Ad Spend Calculator

Use this Break-Even Ad Spend Calculator tool to estimate costs and plan next steps. This hub explains how to use the tool, what affects estimates, and where to go next. Below are the most common drivers people see for this kind of job.

What typically drives the estimate

  • Gross margin per order (after COGS, fees, shipping)
  • Average order value and repeat-purchase rate
  • Current conversion rate from ad click to purchase
  • Target return-on-ad-spend (ROAS) or payback window

Related pages

Disclosure: Affiliate disclosure: We may earn a commission when you engage a vendor through links on this site. This does not affect the price you pay or the cost estimates shown, which are calculated independently of vendor relationships. Calculator results are planning estimates only — not financial guarantees.

Canonical: https://www.marginruler.com/tool/break-even-ad-spend-calculator/

Regional pages

Regional Break-Even Ad Spend Calculator pages

Use the regional break-even ad-spend pages when conversion rate, CPC pressure, order value, or margin assumptions may vary by market. The local pages keep the ad ceiling tied to a regional planning context while preserving the same breakeven math. Browse below; the calculator math is the same on each regional planning page.

Australia

Canada

New Zealand

United States