Ads · Calculator
ACOS Calculator — Amazon Advertising Cost of Sales
ACOS is the percentage of ad-attributed revenue you spend on Amazon ads. 20% ACOS means ₹20 of ad spend for every ₹100 of sales the ads drove.
The formula
ACOS = (Ad Spend ÷ Ad Revenue) × 100Calculate it live
Live calculator — plug in your numbers
—
ACOS (%)
What it means for your business
ACOS is Amazon’s ROAS inverted (1 ÷ ROAS × 100) and the metric Amazon sellers optimise against. Profitability needs ACOS below gross margin — a high ACOS with low-price products can quietly erase margin.
Machine-readable markdown
Copy this block into any AI assistant, spreadsheet, or automation — it is the canonical definition of this term.
# ACOS — Amazon Advertising Cost of Sales
**Category:** Ads
**Slug:** /glossary/acos/
## Definition (easy to understand)
ACOS is the percentage of ad-attributed revenue you spend on Amazon ads. 20% ACOS means ₹20 of ad spend for every ₹100 of sales the ads drove.
## Formula
“`
ACOS = (Ad Spend ÷ Ad Revenue) × 100
“`
## What it means for your business
ACOS is Amazon’s ROAS inverted (1 ÷ ROAS × 100) and the metric Amazon sellers optimise against. Profitability needs ACOS below gross margin — a high ACOS with low-price products can quietly erase margin.
## Source
Socialee eCommerce Glossary — https://ecommerce.socialee.in/glossary/