Amazon ACOS Calculator
Free Amazon ACOS Calculator
Understanding your Amazon advertising performance starts with knowing your ACOS.
Our free Amazon ACOS Calculator helps you calculate your Advertising Cost of Sales (ACOS), allowing you to measure the efficiency of your Amazon PPC campaigns and make better advertising decisions.
Whether you're managing Sponsored Products, Sponsored Brands or Sponsored Display campaigns, calculating ACOS is an essential part of monitoring campaign performance and improving profitability.
Enter your figures below to calculate your Amazon ACOS.
What Is Amazon ACOS?
ACOS stands for Advertising Cost of Sales.
It measures how much you spend on Amazon advertising compared to the sales generated directly from those advertising campaigns.
Amazon ACOS Formula
ACOS = (Advertising Spend ÷ Advertising Sales) × 100
For example:
Advertising Spend = £200
Advertising Sales = £2,000
ACOS = 10%
This means you spent 10% of your advertising sales on Amazon advertising.
Why Is Amazon ACOS Important?
ACOS is one of the most important performance metrics for Amazon advertising.
It helps sellers understand how efficiently their advertising budget is generating sales.
Monitoring ACOS allows you to:
- Measure advertising performance
- Compare campaign efficiency
- Identify underperforming campaigns
- Improve profitability
- Optimise advertising spend
- Make informed bidding decisions
- Monitor campaign performance over time
Regularly reviewing ACOS can help you improve your return on advertising investment whilst supporting long-term business growth.
What Is a Good Amazon ACOS?
There is no universal target ACOS.
The ideal percentage depends on several factors, including:
- Your product margins
- Product launch stage
- Advertising objectives
- Marketplace competition
- Business goals
For example:
Product Launch
Higher ACOS may be acceptable whilst generating visibility, reviews and early sales.
Established Products
Established products often aim for a lower ACOS as campaigns become more efficient.
Brand Growth
Some businesses intentionally operate at a higher ACOS whilst increasing market share or launching new products.
The key is to monitor performance over time rather than focusing on a single figure.
How To Improve Amazon ACOS
Improving ACOS is usually achieved through continuous optimisation rather than reducing advertising spend.
Common strategies include:
- Better keyword research
- Removing poor-performing search terms
- Optimising bids
- Improving product listings
- Increasing conversion rates
- Better product images
- Enhanced A+ Content
- Negative keyword optimisation
- Campaign restructuring
- Regular performance reviews
Small improvements across multiple areas can significantly improve campaign efficiency.
Amazon ACOS vs Amazon TACOS
Although both metrics are important, they measure different aspects of your Amazon business.
| Amazon ACOS | Amazon TACOS |
|---|---|
| Measures advertising efficiency | Measures overall business performance |
| Uses advertising sales only | Uses total Amazon sales |
| Campaign focused | Business focused |
| Ideal for PPC optimisation | Ideal for long-term growth analysis |
Successful Amazon sellers typically monitor both ACOS and TACOS together to gain a complete picture of advertising performance.
Need Help Improving Your Amazon Advertising?
If your ACOS is consistently higher than expected, it may indicate opportunities to improve your advertising strategy.
At AMZ Advice Centre we help businesses understand their advertising performance through:
- Amazon Consultancy
- Amazon Coaching
- Amazon Account Audits
- Amazon SEO Consultancy
- Amazon Seller Education
- Free Amazon Training
We'll help you identify opportunities to improve advertising efficiency whilst supporting your wider Amazon business goals.
Frequently Asked Questions
What does Amazon ACOS stand for?
ACOS stands for Advertising Cost of Sales.
It measures the relationship between your Amazon advertising spend and the sales generated directly from those adverts.
Is a lower ACOS always better?
Not necessarily.
A lower ACOS generally indicates more efficient advertising, but the ideal ACOS depends on your margins, objectives and stage of business growth.
What is the difference between ACOS and TACOS?
ACOS measures advertising spend against advertising sales.
TACOS measures advertising spend against your total Amazon sales.
Both metrics provide valuable but different insights.
Should I calculate ACOS regularly?
Yes.
Regularly monitoring ACOS helps you optimise campaigns, identify trends and make better advertising decisions.
Explore More Free Amazon Tools
- Amazon TACOS Calculator
- Amazon Account Audit
- Amazon SEO Consultancy
- Amazon Coaching
- Free Amazon Training
Improve Your Amazon Advertising Performance
Understanding your Amazon ACOS is an important step towards building more efficient advertising campaigns and a more profitable Amazon business.
If you'd like expert guidance on improving your Amazon advertising performance, our experienced consultants are here to help.
