Google Ads budget & ROAS calculator
Enter your monthly budget, cost per click, conversion rate and average order value to see the clicks, conversions, revenue and return on ad spend you can expect.
What your budget returns
Revenue is an estimate and excludes your product margin. A ROAS above your break-even multiple (revenue needed to cover product cost plus ad spend) means the campaign is profitable.
Indicative estimate based on your inputs. Actual results depend on keyword competition, ad quality, landing-page conversion and seasonality.
How the Google Ads ROAS calculator works
This calculator turns four numbers you already know — your monthly budget, average cost per click, conversion rate and average order value — into a realistic picture of what a Google Ads campaign can return. It divides your budget by CPC to estimate monthly clicks, applies your conversion rate to get conversions, then multiplies by order value for revenue.
ROAS (return on ad spend) is simply revenue divided by budget, shown as a multiple such as 3.2×. The calculator also gives you cost per acquisition — how much you pay in ad spend for each sale — so you can sanity-check whether the maths works before you commit real money.
Remember that revenue here excludes your product margin. A campaign is only truly profitable when ROAS clears your break-even multiple: the revenue needed to cover both the product cost and the ad spend. Use the result as a planning baseline, then refine it against your real account data.
It depends on your margins. As a rule of thumb, a ROAS of 3–4× works for many ecommerce businesses, but a product with thin margins may need 5× or more to be profitable, while a high-margin service can succeed at 2×. Compare your ROAS against your own break-even multiple, not a generic benchmark.
Want a campaign that actually hits these numbers?
The calculator shows what is possible — web1o helps you get there. Book a free consultation and we will review your Google Ads setup, landing pages and tracking to turn budget into measurable return.