About

Most ACoS tools stop at spend ÷ sales. That number alone has told no one anything, ever. What you actually need is where your break-even line sits — which requires the unglamorous inputs: product cost, platform fee, fulfillment per unit.

This calculator puts those inputs first and draws the line for you: ACoS, ROAS, TACOS, profit after ads and a max-CPC ceiling that keeps bids honest. It works entirely in your browser and never asks for ad-account access.

Free, no sign-up, part of the shopifyai.xyz seller-tools family. Not affiliated with Amazon or any advertising platform.