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Amazon ROAS Calculator

Calculate your Return on Ad Spend and find the break-even ROAS your price, product cost and Amazon fees 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. Add your FBA fee and any other per-unit costs below.

Enter 0 if you ship orders yourself.

Inbound shipping, prep, storage or anything else you pay per unit.

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

How to Use Your ROAS Result

ROAS is the revenue your ads brought in for each dollar you spent on them. The full definition is in the ROAS glossary entry. This page is about what to do with the number.

The ROAS formula

ROAS = Revenue ÷ Ad Spend

Example inputs, not real data: ads that bring in $5,000 of revenue from $1,000 of ad spend have a ROAS of $5,000 ÷ $1,000 = 5x, which is a 20% ACoS.

Compare it with your break-even ROAS

Whether a ROAS is good depends on your own margin. Break-even ROAS is 100 divided by your break-even ACoS, and break-even ACoS is your profit margin before ad spend. Above break-even ROAS, ad-attributed sales make money. Below it, each one costs more margin than it brings in. Work it out with the break-even calculator above, or with the break-even ACoS calculator, which also gives a target for the margin you want to keep.

Turn a target ACoS into a target ROAS

  • ROAS = Revenue ÷ Ad Spend (higher is better)
  • ACoS = (Ad Spend ÷ Revenue) × 100 (lower is better)
  • Target ROAS = 100 ÷ Target ACoS, so a 25% target ACoS is a 4x target ROAS

Both describe the same ratio, so pick the one your team reads and keep every target in that unit. To see ad spend against all sales rather than ad sales only, use the TACoS calculator.

Frequently Asked Questions

How do I calculate ROAS?▼
Divide the revenue your ads brought in by what you spent on them. For example, $4 of ad revenue for every $1 of ad spend is a ROAS of 4x. ROAS is the inverse of ACoS. For the full definition, see the ROAS entry in the Shurq glossary.
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, referral fee and FBA 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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Related Free Tools and Guides

Break-Even ACoS Calculator

The highest ACoS a product can carry, and the target ACoS for the margin you want.

ACoS Calculator

ACoS from ad spend and ad sales, and the most you can spend at a target ACoS.

TACoS Calculator

Ad spend against total sales, with ACoS alongside when you know your ad sales.

Max CPC Calculator

The most you can pay per click from price, conversion rate and target ACoS.

ROAS in the Glossary

The full definition of ROAS, with its formula and related terms.

Amazon Bid Optimization Guide

A step-by-step guide to setting and adjusting Amazon PPC bids.