Amazon FBA Tools

Amazon ACOS Calculator

Calculate your Advertising Cost of Sale, break-even ACOS, ROAS and true profit after ads. Optimize your Amazon PPC with real numbers.

⚡ Enter your campaign data below. ACOS, TACOS, ROAS and break-even calculated instantly.
ACOS Formula
Ad Spend / Ad Revenue x 100
% of ad revenue spent on ads
Good ACOS Target
Under 25%
Varies by product margin and goal
ROAS Formula
Ad Revenue / Ad Spend
Revenue per $1 of ad spend
🎯 Campaign Details
Ad Performance
$
$
Product Economics
$
$
$
Your Goal
%
🎯

Enter your campaign data and click Calculate ACOS to see your full breakdown.

What Is Amazon ACOS?

ACOS stands for Advertising Cost of Sale. It measures what percentage of your ad-generated revenue you spent on advertising. A lower ACOS means your ads are more efficient and profitable. It is the most important metric Amazon PPC sellers track.

What Is a Good ACOS on Amazon?

A good ACOS depends on your profit margin. Generally under 25% is strong. Your break-even ACOS equals your margin before ads. Anything below break-even means you are making money from ads.

ACOS vs TACOS: What Is the Difference?

ACOS only measures ad revenue. TACOS divides your ad spend by total revenue including organic sales. TACOS gives a better overall picture as your brand grows and earns more organic traffic.

ACOS Benchmark Guide (2026)

ACOS RangeStatusWhat To Do
Under 15%ExcellentScale budget aggressively — highly profitable
15% to 25%GoodHealthy — keep optimizing and growing
25% to 40%AcceptableProfitable but optimize bids and keywords
40% to Break-EvenCautionBarely profitable — immediate action needed
Above Break-EvenLosing MoneyPause low performers and restructure campaigns

Frequently Asked Questions

How do I calculate Amazon ACOS? +
ACOS equals Total Ad Spend divided by Total Ad Revenue multiplied by 100. For example if you spent $500 on ads and generated $2,000 in ad revenue your ACOS is 25%.
What is break-even ACOS? +
Break-even ACOS is the maximum ACOS at which you make zero profit on ads. It equals your profit margin before advertising. If your margin is 35% your break-even ACOS is 35%. Above this you lose money on each ad sale.
What is the difference between ACOS and ROAS? +
ACOS and ROAS measure the same thing from opposite angles. ACOS is a percentage where lower is better. ROAS is a multiplier where higher is better. An ACOS of 25% equals a ROAS of 4x. Use whichever your team prefers — they tell you the same thing.
Should I always try to get the lowest possible ACOS? +
Not always. A very low ACOS often means your ads are too restricted and you are missing sales. New products often need a higher launch ACOS to build sales velocity and organic rank. Once ranked organically, reduce bids to lower ACOS.
How can I lower my Amazon ACOS quickly? +
The fastest ways to lower ACOS are: pause keywords with high spend and zero sales, reduce bids on keywords above your target ACOS by 15-20%, add negative keywords to stop irrelevant clicks, and improve your listing conversion rate so each click converts more often.
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All calculator results are estimates only. Fee data is sourced from official platform documentation and updated regularly. Always verify current fees with Amazon Seller Central, eBay, Etsy, Shopify or the relevant platform before making business decisions. SellerKalculator is not affiliated with Amazon, eBay, Etsy, Shopify, Walmart or TikTok.

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