ROI Calculator for Ecommerce

Most stores track ad spend and ROAS obsessively. Very few can tell you what's left after the product, the shipping, the fees, and the retainer.

If you're running ads to drive online sales, you probably check ROAS every day. A 3x return feels like a win. But ROAS measures revenue, not profit — and revenue is the number that looks best right before you subtract everything it cost to earn it.

That gap is where a lot of ecommerce budgets quietly leak. Ad spend and agency fees get lumped together as “marketing cost,” orders come in, ROAS looks healthy, and everyone assumes the store is making money. Assuming isn't a metric.

It's easy to feel good about a 3x or 4x ROAS. But ROAS says nothing about what the order actually cost to fulfill. Once you subtract the cost of goods, shipping and fulfillment, payment processing fees, and your agency retainer, that “profitable” order can turn out to have barely broken even — or lost money.

To see the truth, you have to connect your total monthly investment — media plus retainer — to your real order economics: conversion rate, average order value, product cost, shipping, and fees. Do that, and the real question comes into focus. It's not “what's my ROAS?” It's “what return do I need just to break even, and am I clearing it?”

That number is your break-even ROAS, and most store owners have never calculated it.

We built a free calculator that does exactly this. You plug in your ad spend, agency retainer, conversion rate, average order value, and your real unit economics — product cost, shipping, and fees — and it instantly shows you:

It takes about two minutes to fill in, and every number updates the moment you change an input. That's the point. You can test the scenarios that actually drive decisions: What if conversion rate went up half a point? What if we raised average order value? Can we profitably scale spend, or would more budget just lose more money?

The most useful part of this tool isn't the answer it gives you today. It's what it reveals about which lever moves your profit the most. For some stores, the fastest path is a higher conversion rate. For others, it's raising average order value, tightening margin, or simply spending more where the numbers already work.

Run your numbers. Once you know the return you actually need to beat, you'll never look at a raw ROAS number the same way again.