Google Ads Budget Calculator
Estimate what a Google Ads budget can produce before you launch. Enter budget, CPC, conversion rate, value per conversion, and margin to project clicks, conversions, CPA, ROAS, profit, and break-even targets.
Inputs
The amount you plan to spend across Google, Meta, LinkedIn, or another channel.
Your expected cost per click. Use your account average or a conservative estimate.
The percentage of clicks expected to become leads, signups, or purchases.
Average order value, lead value, or first-month revenue per conversion.
Margin before ad cost. Used to estimate profit and break-even CPC.
Projection
At these assumptions, $1,000.00 should generate 20 conversions and 2.40x ROAS.
Estimated clicks
667
$1.50 average CPC
Estimated conversions
20
3.0% conversion rate
Estimated revenue
$2,400.00
$120.00 per conversion
Estimated ROAS
2.40x
Estimated CPA
$50.00
Ad spend divided by conversions.
Net profit
$80.00
Gross profit minus ad spend.
Break-even CPA
$54.00
Max cost per conversion at your margin.
Break-even CPC
$1.62
Max CPC at this conversion rate.
Gross profit
$1,080.00
Revenue multiplied by margin.
Google Ads assumptions to start with
These are not guarantees. Use them as starting points, then replace assumptions with live campaign data.
Local service
$5-$15 CPC
5%-15% lead rate
Higher CPC can still work when one booked job is worth hundreds or thousands of dollars.
Ecommerce
$0.80-$3 CPC
1%-4% purchase rate
Margin matters. A good ROAS can still lose money if product margin is too low.
B2B service
$6-$25 CPC
2%-8% lead rate
Lead value is usually higher, so a higher CPA can still be profitable.
Why Google Ads budget math is different
Search intent controls quality
Google Ads usually works best when the searcher already wants the thing you sell.
Location affects waste
Small businesses should keep geography tight until they know which searches convert.
CPA decides scale
A Google campaign is worth scaling only when cost per acquisition clears your margin.
Daily budget is just monthly budget divided by days
This calculator uses monthly budget for planning, then you can divide it by the campaign length.
Want to launch without setting up Google Ads?
AdFlint can turn these assumptions into a live campaign, then track spend, clicks, and conversions from one dashboard. You can launch through managed Google Ads infrastructure without creating your own Google Ads account.
Questions
How do I calculate a Google Ads budget?
Start with your expected CPC, conversion rate, value per conversion, and gross margin. Budget divided by CPC estimates clicks. Clicks multiplied by conversion rate estimates conversions. From there you can calculate CPA, revenue, ROAS, and profit.
What is a good starting budget for Google Ads?
For many small businesses, $250-$1,500 is a useful first test. The right number depends on your average CPC and how many clicks you need before the results mean anything.
How do I calculate daily budget for Google Ads?
Divide the total test budget by the number of days you want the campaign to run. A $600 test over 30 days is about $20 per day.
What CPC should I use in the calculator?
Use a conservative CPC estimate for your market. Local services, legal, home services, and B2B can have higher CPCs than simple ecommerce or broad consumer categories.
Can AdFlint launch Google Ads without my own account?
Yes. AdFlint can launch Google campaigns through managed Google Ads infrastructure, so you do not need to create your own Google Ads account before testing a campaign.