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Amazon ROAS Calculator

Calculate your Return on Ad Spend and find the break-even ROAS your price, product cost and referral fee imply.

Calculate Your ROAS

Your ROAS

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Formula: ROAS = Revenue ÷ Ad Spend

Break-Even ROAS Calculator

Amazon US referral fees, from sell.amazon.com/pricing as of 27 Sep 2026. FBA and other fees are not included, so your real break-even ROAS is higher.

Break-Even ROAS

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ROAS to ACoS Conversion Table

ROASACoSAd revenue per $1 spent
10x10%$10.00
5x20%$5.00
4x25%$4.00
3x33.3%$3.00
2x50%$2.00
1x100%$1.00
0.5x200%$0.50

What is ROAS (Return on Ad Spend)?

ROAS stands for Return on Ad Spend. It measures how much revenue you generate for every dollar invested in advertising.

The ROAS Formula

ROAS = Revenue ÷ Ad Spend

ROAS Example

If your ads generate $5,000 in revenue from $1,000 in ad spend:

  • ROAS = $5,000 ÷ $1,000 = 5x
  • You earn $5 for every $1 spent on ads
  • Equivalent to 20% ACoS

ROAS vs ACoS

ROAS and ACoS are inverse metrics that measure the same thing differently:

  • ROAS = Revenue ÷ Ad Spend (higher is better)
  • ACoS = (Ad Spend ÷ Revenue) × 100 (lower is better)
  • To convert: ACoS = (1 ÷ ROAS) × 100

Finding Your Target ROAS

Your target ROAS should exceed your break-even ROAS. Use the break-even calculator above to find your specific threshold based on your product margins and Amazon fees.

Frequently Asked Questions

What is ROAS in Amazon advertising?▼
ROAS (Return on Ad Spend) measures how much revenue you earn for every dollar spent on advertising. A ROAS of 4x means you earn $4 in revenue for every $1 in ad spend. It's the inverse of ACoS.
What is a good ROAS for Amazon PPC?▼
A good ROAS depends on your profit margin. A ROAS above your break-even ROAS means ad-attributed sales make money, below it means they lose money. Use the break-even calculator above to find yours from your price, product cost and referral fee.
How do I convert ROAS to ACoS?▼
ACoS = 1/ROAS × 100. For example: 4x ROAS = 25% ACoS, 2x ROAS = 50% ACoS, 5x ROAS = 20% ACoS.
What's the difference between ROAS and ROI?▼
ROAS (Return on Ad Spend) measures revenue against ad spend only. ROI (Return on Investment) measures profit against total investment including product costs, fees, and overhead. ROAS is a marketing efficiency metric, while ROI is a profitability metric.
Why is my ROAS low even with good sales?▼
Low ROAS can occur when: 1) CPC (cost per click) is too high relative to conversion value, 2) Conversion rate is low, 3) You're bidding on expensive competitive keywords, 4) Your bids aren't optimized for profitability.

Maximize Your ROAS Automatically

Shurq adjusts your bids automatically toward the target you set, using advertising data synced hourly.

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