What is ad ROI calculator?

An ad ROI calculator estimates the profitability of paid advertising campaigns. It calculates revenue, profit, ROAS (Return on Ad Spend), CPA (Cost Per Acquisition), and break-even CPC based on your campaign inputs like ad spend, conversion rate, deal value, and gross margin.

How do you calculate ad ROI?

Ad ROI = (Profit / Total Cost) × 100. To calculate: (1) Determine total cost (ad spend + overhead), (2) Calculate gross profit (revenue × margin), (3) Subtract total cost from gross profit, (4) Divide by total cost and multiply by 100. Example: $5,000 profit / $10,000 cost = 50% ROI.

What is ROAS in advertising?

ROAS (Return on Ad Spend) = Revenue / Ad Spend. It measures how much revenue you generate for every dollar spent on ads. Example: If you spend $10,000 and generate $30,000 in revenue, your ROAS is 3x (or 300%). A 3x ROAS is typically considered healthy for B2B SaaS.

What is break-even CPC?

Break-even CPC is the maximum cost per click you can afford while still remaining profitable. It is calculated as: Break-even CPC = (Conversion Rate × Close Rate × Deal Value × Gross Margin). If your actual CPC exceeds this, the campaign loses money.

What is CPA in advertising?

CPA (Cost Per Acquisition) = Total Cost / Number of Customers. It measures how much you spend to acquire one customer. Example: If you spend $10,000 and acquire 10 customers, your CPA is $1,000. For B2B SaaS, CAC (Customer Acquisition Cost) and CPA are often used interchangeably.

What ROAS should target for paid ads?

Target ROAS depends on your business model. B2B SaaS typically targets 3-5x ROAS (300-500%) to be profitable after overhead. E-commerce targets 2-4x. High-margin SaaS can be profitable at 2x. Account for sales costs, customer support, and overhead when setting ROAS targets.

Free GTM Tools / Ad Buddy

✦ Free ad ROI calculator

Ad Buddy: calculate paid ads profitability

Estimate campaign ROI, profit, CPA, revenue, ROAS, clicks, and break-even CPC before you spend more budget on Google Ads, LinkedIn Ads, or paid social.

What this calculator shows

Use Ad Buddy to quickly understand whether your paid acquisition assumptions can support profitable growth before scaling spend.

ROIProfitability

CPACost per customer

ROASRevenue efficiency

CPCBreak-even limit

Calculator

Estimate your ad ROI

Enter your paid campaign assumptions. The calculator updates instantly and gives you a directional read on revenue, profit, CPA, ROAS, and break-even CPC.

Campaign inputs

Use realistic numbers. Small changes in conversion or close rate can dramatically change paid acquisition economics.

Buying model

Ad spend ($) Your total paid media budget

Expected CPC ($) Average cost for each click from your ads

Landing conversion (%) % of site visitors who become leads

Lead-to-customer (%) % of leads that convert to paying customers

Average deal value ($) Average revenue per customer deal

Gross margin (%) Revenue minus COGS (delivery costs)

Extra campaign cost ($) Sales ops, support, or other overhead

Projected results

Use these numbers as a decision filter before launching or scaling paid campaigns.

ROI

Profit / total cost

Profit

Gross profit after cost

Revenue

Estimated closed-won value

ROAS

Revenue / ad spend

Break-even CPC

Max profitable CPC

CPA

Cost per customer

Clicks

Estimated traffic

Customers

Estimated new customers

Add your assumptions to see whether the economics make sense.

How to use Ad Buddy

Use this calculator before launching or scaling a paid acquisition campaign. It helps you understand whether your CPC, conversion rate, close rate, deal value, and gross margin can support profitable growth.

ROI shows estimated campaign profitability.
ROAS shows revenue efficiency compared to ad spend.
Break-even CPC shows the maximum cost per click you can afford.
CPA estimates your paid acquisition cost per customer.

Ad ROI calculator benchmark: typical metrics by industry

Industry	Target ROAS	Avg CPC	Expected ROI
B2B SaaS (LinkedIn)	3-5x	$5-15	200-400%
E-commerce	2-4x	$0.50-2.00	100-300%
B2B Lead Gen	3-6x	$3-20	200-500%
SaaS (Google Search)	2.5-4x	$8-25	150-300%

Note: These benchmarks vary by niche, targeting precision, conversion rate optimization, and sales effectiveness. Use this calculator to model your specific economics.

Why paid ad ROI matters for growth marketing

Understanding your ad ROI before scaling spend is critical for sustainable growth. Many marketing teams optimize for vanity metrics like click-through rate or cost per lead, but neglect the true business outcome: profitable pipeline.

Ad profitability depends on 4 core variables:

Acquisition cost (CPA): How much you spend per customer. Lower is better, but must balance with customer quality.
Customer value (LTV): How much gross profit you earn over the customer lifetime. Related to your deal size, margin, and retention.
Payback period: How quickly you recover the CAC. Faster payback reduces cash burn and funding risk.
Return on ad spend (ROAS): Revenue generated per dollar of ad spend. Must exceed 2-3x to account for overhead and stay profitable.

Use this calculator to test different acquisition strategies, identify which channels or campaigns are profitable, and decide where to allocate budget.

Common ad ROI mistakes to avoid

Ignoring indirect costs: Don't forget sales overhead, customer success costs, and support. They reduce your true margin.
Using conversion rate, not close rate: A site visitor is not a customer. Account for your actual sales close rate from leads.
Assuming all traffic converts equally: Paid traffic quality varies. Test different audiences and bidding strategies.
Scaling before understanding profitability: If ROI is negative or marginal, scaling will only lose more money. Fix the model first.
Measuring at the campaign level, not account: One campaign might be profitable, but your total ad account ROI is what matters for scaling.

Get help optimizing your paid acquisition

If you're uncertain about your ad ROI or need help building a sustainable paid acquisition strategy, let's talk.

Related resources & guides

All Free GTM ToolsExplore our complete growth marketing tool hub (CAC calculator, GTM frameworks, and more). ROI CalculatorCalculate ROI, net gain, and payback period for any business investment, not just ads. CAC Payback CalculatorCalculate CAC payback period, LTV/CAC ratio, and SaaS growth risk score. B2B SaaS SEO StrategyBuild demand generation through content. Learn how to generate 15-30% of pipeline from organic search. Complete GTM Stack 2026The full GTM stack for paid + organic demand generation, RevOps, and revenue measurement.