Are your ads actually making money?
Enter your numbers below to see whether your ads make money: your current MER, break-even ROAS, gross margin, and the return you need to hit. Standard metrics, explained in plain English.
Are you above the line?
The line is your break-even ROAS. Land to the right of it and your ads make money. Land to the left and they lose it.
Yes, and you're beating your target
Every $1 on ads brings back 4.00×, past both your 1.85× break-even and your 4.0× target. You likely have room to spend more.
Your key metrics
Current MER
what your ads returnRevenue ÷ ad spend. Every $1 on ads brings back 4.00× in revenue.
Break-even ROAS
what you need to break even1 ÷ gross margin. The return you need just to cover product and shipping.
Gross margin
what you keep per saleShare of each sale left after product and shipping, before you pay for ads.
Your numbers
Last month
Total online revenue for the month. In Shopify: Analytics, then Reports, then Sales.
All paid channels added together: Google Ads plus Meta plus anything else.
Per-order economics
Your typical order size. Roughly revenue divided by number of orders.
Cost of goods sold for one typical order. The product cost, not the price you charge.
Your cost to fulfil an order. Not what the customer pays for shipping.
Target
The blended return you want per ad dollar. 3× to 4× is a healthy aim for most stores.
Nothing is stored or sent anywhere. This runs in your browser.
Hitting target? The next move is scaling without losing efficiency. Let's talk.
Just Free AuditWhat this ad profit calculator tells you
It answers one question. Are your ads making money, or quietly losing it? Instead of judging a single ROAS number on its own, it works out the four metrics that actually decide profitability, from numbers you already have. Last month's revenue, total ad spend, average order value, and your product and shipping cost per order.
The four numbers that decide it
Your blended return across every channel. The revenue you get back for every $1 of ad spend, not just one campaign in isolation.
The exact return where ads neither make nor lose money. Beat it and you earn profit. Miss it and you pay to acquire.
What is left from each order after product and shipping. This is the money your ad spend is actually paid out of.
The most you can spend to win a customer before that very first order starts losing you money.
MER above your break-even ROAS
Your advertising is profitable. Every extra $1 of spend is buying profit, not just revenue.
MER below your break-even ROAS
You are paying to lose money. The wider the gap, the faster the spend leaks out.
Founders, marketers, and CMOs use these numbers to set a target MER, decide how hard to push spend, and catch the common trap where a healthy-looking ROAS still loses money because the margin is thin. Change any input above and every metric updates instantly. We built the Ad Profit Check at Just Lead Market, a Google Ads and CRO agency, so store owners can sanity-check ad profitability before they scale spend.
If the result is not what you hoped, the leak is usually in one of three places.
Ad profit calculator FAQs
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