ACOS Calculator



In the fast-paced world of digital advertising, understanding the effectiveness of your marketing campaigns is crucial. One essential metric for measuring your ad campaign’s success is the Advertising Cost of Sales, or ACOS. ACOS allows advertisers to evaluate the efficiency of their ad spend by calculating the percentage of advertising costs relative to the generated revenue.

Whether you’re a seasoned digital marketer or just starting with online advertising, mastering ACOS calculation is a must. In this comprehensive guide, we will delve into the formula for ACOS (ACOS=AS/AR∗100), break down how to use it, provide practical examples, and even offer an HTML code for an ACOS calculator to simplify the process.


The ACOS formula is straightforward but incredibly powerful for advertisers looking to optimize their ad campaigns. It’s represented as follows:

ACOS = (Advertising Spend / Ad Revenue) * 100


  • ACOS stands for Advertising Cost of Sales, expressed as a percentage.
  • Advertising Spend (AS) is the total amount of money spent on advertising.
  • Ad Revenue (AR) refers to the revenue generated from the advertising campaign.

By using this formula, you can determine what percentage of your revenue is being consumed by your advertising costs. A lower ACOS indicates a more efficient ad campaign, as it means you’re spending less to generate each dollar of revenue.

How to Use the ACOS Calculator

Calculating ACOS is a straightforward process. Here are the steps to follow:

  1. Determine Advertising Spend (AS): This is the total amount you’ve spent on advertising during a specific period, such as a week or a month. It includes expenses like ad placements, clicks, and any other advertising-related costs.
  2. Calculate Ad Revenue (AR): Measure the revenue generated as a direct result of your advertising efforts during the same period. Be sure to attribute the revenue accurately to the specific campaign or source.
  3. Apply the Formula: Plug the values of AS and AR into the ACOS formula: ACOS = (AS / AR) * 100.
  4. Interpret the Result: The resulting percentage is your ACOS. A lower ACOS suggests that you are spending your advertising budget efficiently, while a higher ACOS may indicate that you need to optimize your campaign or reduce advertising costs.


Let’s illustrate the ACOS calculation with an example:

  • Advertising Spend (AS) = $1,000
  • Ad Revenue (AR) = $5,000

Using the ACOS formula:

ACOS = ($1,000 / $5,000) * 100 = 20%

In this example, your Advertising Cost of Sales (ACOS) is 20%. This means that for every dollar spent on advertising, you generated $5 in revenue.


Q1: What is a good ACOS percentage?

A good ACOS percentage varies by industry and business goals. Generally, a lower ACOS is desirable, but what’s considered “good” depends on your profit margins, competition, and advertising objectives.

Q2: How can I reduce my ACOS?

To reduce ACOS, consider optimizing your ad campaigns, refining targeting, improving ad quality, and managing your budget more effectively. Continuously monitor and adjust your strategies to find the right balance.

Q3: What’s the significance of a low ACOS?

A low ACOS indicates that you are efficiently converting advertising dollars into revenue. It suggests that your ad campaigns are cost-effective, and you’re getting a good return on investment.

Q4: Can ACOS be negative?

No, ACOS cannot be negative. ACOS is a percentage that represents the ratio of advertising spend to ad revenue. If your advertising spend is greater than ad revenue, you’ll have a percentage greater than 100%, indicating that your campaign is not profitable.


Advertising Cost of Sales (ACOS) is a vital metric for gauging the efficiency of your digital advertising campaigns. By calculating ACOS using the formula (ACOS=AS/AR∗100), you can make informed decisions to improve the return on your advertising investment. Remember that a lower ACOS generally indicates more cost-effective advertising. Whether you’re an experienced marketer or just getting started, mastering ACOS calculation is essential for success in the digital advertising landscape.

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