Calculator 04 / Amazon Ads

Amazon ACoS calculator.

Measure current ad efficiency, then compare it with the ACoS your own product economics can afford.

Advertising metrics

Enter your Amazon Ads performance for the period.

Ad spend

Ad-attributed sales

Total sales Used only for TACoS.

Optional product economics

Add these values to calculate break-even and target ACoS. Enter actual Amazon fees; this tool does not estimate referral or FBA fees.

Sale price

Product cost

Actual Amazon fees

Fulfillment + shipping

Expected return losses

Other costs

Target margin (%)

Metric scope

Amazon's official guidance supports the ACoS and ROAS definitions used here. TACoS is displayed as a seller planning ratio and is not labeled as an Amazon-official metric.

Break-even ACoS = pre-ad profit ÷ sale price

Review the official Amazon Ads ACoS guide .