Helpful Toolbox

Google Ads ROAS Calculator

Forecast what a Google Ads campaign will really return. Enter ad spend, clicks (or average CPC), conversion rate, and average order value to see projected revenue, ROAS as a multiple and a percent, cost per conversion, and the break-even ROAS your profit margin demands — live, right in your browser.

📖 How it works & FAQ

Forecast ROAS before the money is spent

Most ROAS math happens after a campaign has already burned its budget. This calculator works forward instead, using the numbers Google Ads reports on every campaign row: cost (ad spend), clicks or average CPC, and conversion rate, plus the average order value from your store analytics. It walks the funnel exactly the way the auction does — spend buys clicks, a percentage of clicks convert, and each conversion rings up one average order — then reports projected revenue, ROAS as a multiple and a percent, and your cost per conversion. Everything runs in your browser and nothing you type is uploaded.

Break-even ROAS is the number that matters

A 3.00x ROAS sounds healthy until margin enters the room. If only 30% of each order is gross profit, a $3 return on $1 of spend leaves just $0.90 to pay for that $1 click — a loss. Break-even ROAS is 100 divided by your gross margin percentage: 2.50x at a 40% margin, 4.00x at 25%. The last card compares your projected ROAS to that line and says plainly whether the campaign makes or loses money. Estimates only — not professional, financial, tax, or legal advice.

How to use it

  1. Enter your ad spend for the campaign or period (the “Cost” column in Google Ads).
  2. Pick whether you know total clicks or average CPC — the calculator derives the other from spend.
  3. Enter your conversion rate (“Conv. rate” in Google Ads) and average order value from your store.
  4. Add your gross profit margin and read the cards: revenue, ROAS in x and %, cost per conversion, and break-even ROAS.

FAQ

Where do I find these numbers in Google Ads?
The campaign table shows Cost, Clicks, Avg. CPC, and Conv. rate. Average order value comes from your store or analytics platform, since Google only sees the conversion value you send it.
What is a good ROAS for Google Ads?
Whatever clears your break-even. Many ecommerce accounts target 3–4x, but a 70%-margin product can profit at 1.5x while a 20%-margin one needs 5x.
Is cost per conversion the same as CPA?
Yes — spend divided by conversions. If it comes out above your break-even CPA (order value × margin), the campaign loses money on every sale.
Why might real results differ from the forecast?
Conversion lag, attribution windows, returns, and seasonality all move the numbers. Treat this as a planning model and re-check against actual store revenue.