Ad Budget & ROAS Calculator
Before you spend a dollar, see what it should buy. Enter your budget and a few assumptions to project clicks, conversions, cost per acquisition, and return on ad spend.
How the numbers connect
Your budget buys clicks (budget ÷ CPC). A share of those clicks convert (clicks × conversion rate). From there you get cost per acquisition (budget ÷ conversions), revenue (conversions × revenue per conversion), and ROAS (revenue ÷ budget). Change any input and watch where the leverage is — often a small lift in conversion rate beats a bigger budget.
These are projections, not guarantees. Real campaigns vary by keyword, audience, creative, and landing page — which is exactly what ongoing management is for.
Promoto.io
Stop hand-tuning ad campaigns. Promoto writes, launches, and manages your Google, Meta & LinkedIn ads on autopilot.
Frequently asked questions
What is ROAS?
ROAS (return on ad spend) is revenue generated divided by ad spend. A ROAS of 4 means you earned $4 in revenue for every $1 spent on ads.
What is a good ROAS?
It depends on your margins. A common rule of thumb is a 4:1 ROAS (400%) for ecommerce, but a business with high margins can be profitable at a much lower ROAS, while a low-margin business needs more.
How is cost per acquisition (CPA) calculated?
CPA is total ad spend divided by the number of conversions. If you spend $1,000 and get 25 conversions, your CPA is $40.