Free Amazon Seller Tool • Updated 2025

ACoS Calculator

Calculate Advertising Cost of Sale

ad efficiencyAmazon advertising metricscampaign performanceadvertising profitability

Ad Performance

Total Ad Spend ($)

Ad-Attributed Sales ($)

Results

ACoS

ROAS

Your inputs are automatically saved for next time

How to Use This Calculator

Enter Ad Spend

Input your total PPC advertising spend

Enter Ad Sales

Add your ad-attributed sales revenue

View ACoS & ROAS

See both metrics calculated instantly

Calculate your ACoS (Advertising Cost of Sale) and understand your PPC campaign profitability.

Pro Tips

Compare ACoS to profit margin to determine profitability
Track ACoS trends over time, not just snapshots
Consider Total ACoS (TACoS) for full picture

Common Use Cases

Campaign performance review

Profitability analysis

Budget optimization

Reporting

Optimize Your ACoS Automatically

Use AI-powered PPC tools to achieve lower ACoS and higher profits

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Frequently Asked Questions

What is ACoS on Amazon?

ACoS (Advertising Cost of Sale) = (Ad Spend ÷ Ad Sales) × 100. It measures what percentage of your ad-attributed revenue goes to advertising costs. Lower ACoS = more profitable ads.

What is a good ACoS for Amazon?

Good ACoS depends on your profit margin. If margin is 30%, ACoS under 30% is profitable. Average ACoS across Amazon is 25-30%. Top performers achieve 15-20% ACoS.

How do I lower my Amazon ACoS?

Lower ACoS by: 1) Improving conversion rate, 2) Optimizing keywords (pause low performers), 3) Better product listings, 4) Negative keywords, 5) Adjusting bids based on performance.

What is the difference between ACoS and ROAS?

ACoS and ROAS are inverses. ACoS = Ad Spend / Revenue (25% ACoS). ROAS = Revenue / Ad Spend (4x ROAS). Both measure ad efficiency differently. ACoS is Amazon-specific terminology.