2026 Amazon PPC ACoS Solver: Calculate campaign Advertising Cost of Sale (ACoS %), Cost Per Acquisition (CPA), Return on Ad Spend (ROAS), and determine the exact spend adjustment needed to hit your target profit margin goal.
PPC Ad Performance Inputs
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Target ACoS Budget Optimization Panel
Target: 25.0%Max Spend for 25% ACoS:$500.00At current $2000 ad revenue
Available Spend Cushion:+$0.00Ad spend is within target budget
Revenue Required at Current Spend:$2000.00Sales volume needed at $500 spend
Target CPA (Cost / Order):$10.00Max ad cost per unit sale
ACoS Performance OutputGood (≤ Target)
Campaign ACoS
25.0%
ROAS = 4.00x | CPA = $10.00
25.0%
ACoS %
$10.00
CPA / Unit
50.0 u
Units Sold
Gap to Target (25%)Under Target
+0.00%Campaign is meeting profitability goals!
Verify before you act:Amazon FBA & referral fees reflect 2026 fee updates. Verify final numbers in Seller Central.
ACoS vs Target Goal Comparison
Target: 25%Green bar indicates current ACoS is within target goal. Red indicates overspend.
Frequently Asked Questions — Amazon ACoS & PPC
Key facts regarding ACoS, ROAS, CPA, and target ad budget optimization
What is Amazon ACoS (Advertising Cost of Sale)?▼
ACoS (Advertising Cost of Sale) is a key metric used to measure the efficiency of your Amazon PPC ad campaigns. It is calculated as (Total Ad Spend ÷ Total Ad Revenue) × 100. A lower ACoS means your ads are more profitable.
What is a good target ACoS on Amazon?▼
A good target ACoS depends on your product's profit margin. To break even on ad spend, your target ACoS should equal your pre-ad profit margin %. For example, if your product has a 25% profit margin, an ACoS of 25% is break-even, and anything below 25% is profitable.
What is the difference between ACoS and ROAS?▼
ACoS and ROAS (Return on Ad Spend) are inverse metrics. ACoS measures spend as a percentage of revenue (Spend ÷ Revenue), while ROAS measures revenue generated per dollar spent (Revenue ÷ Spend). For example, a 25% ACoS equals a 4.0× ROAS.
What is CPA (Cost Per Acquisition) in Amazon PPC?▼
CPA (or Cost Per Order) is the amount of ad spend required to generate one unit sale. It is calculated as Total Ad Spend ÷ Units Sold (or ACoS % × Retail Selling Price).
How can I lower my Amazon ACoS?▼
To reduce ACoS, negate non-converting search terms, lower bids on high-ACoS keywords, optimize product listing images and title for higher conversion rates (CVR), and reallocate budget to top-performing exact match keywords.
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