Clicks and CPC
Multiply expected paid clicks by the average amount you expect to pay for each click.
Ad budget = clicks × average CPCAIM GROWTH TOOLS · PAID MEDIA · REVENUE ACCOUNTABILITY
Free Google Ads and PPC planning tool
Ad Budget Calculator.
Estimate how much to spend on paid advertising using the numbers you already know. Plan from expected clicks and CPC, customer targets and CAC, attributed revenue and ROAS, or impressions and CTR.
Built by AiM GrowthCalculations run in your browserLast reviewed: August 2026
Choose how you want to plan
Calculate your ad budget.
Currency selection changes formatting only. No exchange-rate conversion is performed.
How the calculation works
Four ways to plan an advertising budget.
Customers and target CAC
Multiply required new customers by the maximum acquisition cost the business can support.
Ad budget = customers × target CACRevenue and target ROAS
Divide the revenue you want attributed to advertising by the required return on ad spend.
Ad budget = revenue ÷ target ROASImpressions, CTR and CPC
Apply CTR to impressions to estimate clicks, then multiply those clicks by CPC.
Ad budget = impressions × CTR × CPCWorked examples
Turn campaign assumptions into a budget.
| Planning method | Assumption | Calculation | Estimated budget |
|---|---|---|---|
| Clicks and CPC | 2,000 clicks at $3.50 | 2,000 × $3.50 | $7,000 |
| Customer target | 40 customers at $175 CAC | 40 × $175 | $7,000 |
| Revenue target | $28,000 at 4.0x ROAS | $28,000 ÷ 4 | $7,000 |
The result is a planning estimate, not a guarantee.
CPC, conversion rate and demand can change once a campaign is live. Treat the result as a starting model. Compare planned values with actual platform and CRM data, then update the inputs as the campaign gathers evidence.
A budget becomes commercially useful when it connects to the next funnel stage. High click volume can still produce poor results when conversion rate, lead quality or sales follow-up is weak.
Need help connecting the budget to tracking, conversion and revenue? Explore AiM Growth Paid Marketing & Analytics.
Interpret the result
A budget tells you what you can buy. Not whether it will pay back.
Confirm the audience and available search or platform inventory can absorb the planned spend.
Model the clicks, leads and customers required. A budget without conversion assumptions is only a media-cost estimate.
Compare CAC with revenue per customer, gross margin and repeat purchase behaviour before scaling spend.
Calculate your inputs
Need a number used above? Start here.
This calculator uses CPC, CAC, ROAS and CTR to estimate a budget. The tools below calculate those inputs from your actual campaign data.
Frequently asked questions
Ad budget questions, answered directly.
What is an ad budget?
An ad budget is the amount a business plans to spend on paid advertising during a defined period. It may cover one campaign, one platform or the complete paid-media programme. This calculator estimates media spend only unless you deliberately include other acquisition costs in your inputs.
How do you calculate an advertising budget?
The right formula depends on what you already know. Multiply expected clicks by CPC, multiply target customers by target CAC, divide attributed revenue by target ROAS, or estimate clicks from impressions and CTR before multiplying by CPC.
How much should I spend on Google Ads?
There is no universal amount. Your starting budget should reflect search demand, expected CPC, conversion rate, customer economics, margin and the amount of data needed to make a decision. Model the budget, then compare it with what one acquired customer is worth.
What is the difference between ad spend and marketing budget?
Ad spend is the money paid directly to advertising platforms. A marketing budget can also include staff, agencies, creative production, software, research and other operating costs.
Does the currency selector convert exchange rates?
No. It changes how the result is formatted only. All monetary inputs should use the same currency.
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