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Amazon ACoS Calculator

Amazon ACoS Calculator

Calculate ACoS from ad spend and sales to measure Amazon ad efficiency. Get a clear percentage to guide bid and budget decisions.

$
$
Advertising Cost of Sales
0.0%
Excellent
0.00×
ROAS
$0.00
Net Revenue
$0.00
Ad Spend

Want to scrape data in bulk? Try Thunderbit for free.

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Automate Amazon Research with ThunderbitUse Thunderbit to scrape product, keyword, and ad data fast, then extract it into structured tables for analysis. Skip manual copy-paste and keep your workflow automated.
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Automate Amazon Research with Thunderbit

Thunderbit helps you scrape Amazon listings and related pages, then extract structured fields like price, ratings, ASIN, seller info, and ad signals. It can also follow subpages to enrich your table, summarize or categorize key details, and format outputs for reporting. Scrape across paginated results, subpages, and supported file types like PDFs, docs, and images when your research spans multiple sources. Export your datasets to Google Sheets, Airtable, or Notion to track performance and connect ACoS calculations to real marketplace data.

How to Calculate ACoS Using Thunderbit

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STEP 1Download and InstallDownload and install the Thunderbit Chrome Extension from the Thunderbit Chrome Extension Download Page. Once installed, log in or create a free account to get started.
step_02.png
STEP 2Open ExtensionOpen the Thunderbit Chrome Extension in your browser. In the tool list, select the "Amazon ACoS Calculator" and open the "Calculate ACoS" tab. Enter your campaign numbers in the two fields: type your total "Ad Spend" and your total "Sales" using numbers only, and make sure both values use the same currency.
step03.png
STEP 3Click the Calculate ACoS ButtonClick the "Calculate ACoS" button. Thunderbit will compute ACoS using the formula (Ad Spend / Sales) * 100 and return a text result such as "ACoS: 25%". If Sales is 0 or missing, the tool will return "ACoS: N/A (Sales must be greater than 0)". Copy the result for use in your reporting or optimization workflow.

Learn how to calculate Amazon ACoS from ad spend and sales

Calculate ACoS for Amazon ads

Use the Amazon ACoS Calculator to compute Advertising Cost of Sales with a simple formula: (Ad Spend ÷ Sales) × 100. Enter your campaign ad spend and attributed sales in the same currency to get a clear percentage that shows how much you paid in ads for each dollar of revenue. It’s built for Amazon sellers, PPC managers, and ecommerce teams who need quick performance checks.
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Handle edge cases and keep results readable

The calculator includes practical safeguards so your reporting stays accurate. If Sales is missing or equals 0, it returns an ACoS status that explains why the metric can’t be computed. If Ad Spend is 0 while Sales is greater than 0, it returns 0%. Results are rounded to up to two decimals and formatted without trailing zeros, making them easy to paste into notes or reports.
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Optimize bids and budgets using a single KPI

ACoS is a core metric for deciding whether to scale, pause, or refine campaigns. Use the output to compare ad groups, keywords, or product targets, then adjust bids and budgets based on efficiency. Ecommerce operators can pair ACoS with margins to set target thresholds, spot overspending, and prioritize campaigns that support profitability goals during launches, promotions, or seasonal peaks.
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Standardize team reporting and campaign reviews

Because the tool returns a clean text result in a consistent format, teams can use it in weekly PPC reviews, performance summaries, and SOPs. Analysts can calculate ACoS for multiple campaigns and record the percentages in spreadsheets, dashboards, or internal docs. This helps align stakeholders on what “good” performance looks like and supports faster decisions across agencies, brands, and in-house teams.
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What users say about Thunderbit

Taryn W.Growth Strategist@Thunderbit changed how I run competitor research. I click 'AI Suggest Fields,' and it builds a clean table across paginated results—no coding, no CSS. Huge time-saver when analyzing product data from long-tail marketplaces.
Miles T.Sales Development ConsultantI use Thunderbit to grab emails and phone numbers from directories. It extracts clean contact info in one click, and exporting to Sheets or Notion takes seconds. No extra setup, no coding—just usable data ready to work with.
Rhea C.E-commerce AnalystThunderbit helps me monitor SKU data across multiple pages. I scrape the listings, then use Subpage Scraping to pull full product specs, pricing, reviews, and stock. The AI organizes everything into columns I define.
Cassian B.Real Estate AdvisorThunderbit's Scheduled Scraper makes real estate tracking easier. I describe the interval in plain English, and it automatically pulls updated listings, prices, and links without touching the setup again. Simple and very practical.
Dorian B.Content & SEO SpecialistI use Thunderbit's Field AI Prompts to clean and tag scraped blog content. It extracts titles, authors, and even suggests categories. Works great across dynamic sites and subpages—perfect for building structured SEO datasets.
Lina K.Marketplace Operations LeadWe track SKUs from niche stores using Thunderbit. Cloud Scraping handles 50 pages at a time, and for login-required sites, we switch to browser mode. It’s fast, flexible, and doesn’t need ongoing maintenance or manual edits.
Jorge F.Inbound Sales ManagerThunderbit’s AI Autofill is a lifesaver. After scraping contact info, I use it to fill lead forms directly in my browser. I just select the tab, and it fills everything using the scraped row. No manual input needed.
Alina D.Freelance ResearcherI rely on Thunderbit for extracting data from PDFs, image-based sites, and infinite scroll pages. It handles messy formats with AI and delivers ready-to-export tables I can send to Google Sheets or Airtable in seconds.
Taryn W.Growth Strategist@Thunderbit changed how I run competitor research. I click 'AI Suggest Fields,' and it builds a clean table across paginated results—no coding, no CSS. Huge time-saver when analyzing product data from long-tail marketplaces.
Miles T.Sales Development ConsultantI use Thunderbit to grab emails and phone numbers from directories. It extracts clean contact info in one click, and exporting to Sheets or Notion takes seconds. No extra setup, no coding—just usable data ready to work with.
Rhea C.E-commerce AnalystThunderbit helps me monitor SKU data across multiple pages. I scrape the listings, then use Subpage Scraping to pull full product specs, pricing, reviews, and stock. The AI organizes everything into columns I define.
Cassian B.Real Estate AdvisorThunderbit's Scheduled Scraper makes real estate tracking easier. I describe the interval in plain English, and it automatically pulls updated listings, prices, and links without touching the setup again. Simple and very practical.
Dorian B.Content & SEO SpecialistI use Thunderbit's Field AI Prompts to clean and tag scraped blog content. It extracts titles, authors, and even suggests categories. Works great across dynamic sites and subpages—perfect for building structured SEO datasets.
Lina K.Marketplace Operations LeadWe track SKUs from niche stores using Thunderbit. Cloud Scraping handles 50 pages at a time, and for login-required sites, we switch to browser mode. It’s fast, flexible, and doesn’t need ongoing maintenance or manual edits.
Jorge F.Inbound Sales ManagerThunderbit’s AI Autofill is a lifesaver. After scraping contact info, I use it to fill lead forms directly in my browser. I just select the tab, and it fills everything using the scraped row. No manual input needed.
Alina D.Freelance ResearcherI rely on Thunderbit for extracting data from PDFs, image-based sites, and infinite scroll pages. It handles messy formats with AI and delivers ready-to-export tables I can send to Google Sheets or Airtable in seconds.

Frequently Asked Questions

Extract Data using AI
Easily transfer data to Google Sheets, Airtable, or Notion
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PRODUCT HUNT#1 Product of the Week
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