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Amazon ACoS Calculator

Calculate your Advertising Cost of Sale instantly. Understand your Amazon PPC efficiency and optimize for profitability.

Calculate Your ACoS

Your ACoS

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Formula: ACoS = (Ad Spend ÷ Ad Revenue) × 100

Calculate Max Budget

Maximum Ad Spend

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Formula: Max Spend = (Target ACoS ÷ 100) × Revenue

What is ACoS (Advertising Cost of Sale)?

ACoS stands for Advertising Cost of Sale. It's the primary metric Amazon sellers use to measure the efficiency of their PPC (Pay-Per-Click) advertising campaigns.

The ACoS Formula

ACoS = (Ad Spend ÷ Ad Revenue) × 100

ACoS Example

If you spend $100 on Amazon ads and those ads generate $400 in revenue:

  • ACoS = ($100 ÷ $400) × 100 = 25%
  • This means you spent 25 cents in advertising for every $1 of ad-attributed revenue

Why ACoS Matters

ACoS directly impacts your profitability. If your product has a 30% profit margin and your ACoS is 35%, you're losing money on every ad-attributed sale. Understanding and optimizing your ACoS is crucial for sustainable Amazon advertising.

ACoS vs ROAS

While ACoS measures cost as a percentage of revenue, ROAS (Return on Ad Spend) measures revenue as a multiple of cost. They're inverse metrics:

  • 25% ACoS = 4x ROAS (you get $4 back for every $1 spent)
  • 50% ACoS = 2x ROAS
  • 100% ACoS = 1x ROAS (ad revenue equals ad spend)

Frequently Asked Questions

What is ACoS in Amazon advertising?▼
ACoS (Advertising Cost of Sale) is a metric that measures your advertising efficiency on Amazon. It's calculated by dividing your ad spend by ad revenue, then multiplying by 100. For example, if you spend $10 on ads and generate $100 in ad revenue, your ACoS is 10%.
What is a good ACoS for Amazon PPC?▼
A good ACoS depends on your profit margin and goals. Your break-even ACoS equals your profit margin before ad spend: an ACoS below it means ad-attributed sales make money, above it means they lose money. For product launches or brand awareness campaigns, running above break-even for a while can be a deliberate choice.
How do I lower my ACoS?▼
To lower ACoS: 1) Add negative keywords to stop wasting spend on irrelevant searches, 2) Optimize your product listing for better conversion rates, 3) Adjust bids based on keyword performance, 4) Focus budget on high-performing keywords, 5) Use an automated bidding tool like Shurq to adjust bids toward the target ACoS you set.
What's the difference between ACoS and TACoS?▼
ACoS measures ad spend against ad-attributed revenue only. TACoS (Total Advertising Cost of Sale) measures ad spend against your total revenue (organic + ad-attributed). TACoS gives a better picture of how advertising impacts your overall business profitability.
Should I aim for the lowest possible ACoS?▼
Not necessarily. Very low ACoS might mean you're under-investing in advertising and missing growth opportunities. The goal is finding the optimal ACoS that maximizes profit while maintaining competitive visibility. This balance depends on your margins, competition, and business stage.

Automate Your ACoS Optimization

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