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ROAS & Ad Profit Calculator

Measure return on ad spend and check whether attributed sales are actually profitable. Results update instantly in your browser.

Actual ROASNet ad profitBreak-even ROAS
Simple and private: Enter estimates below. Calculations happen in this browser and are not saved to the project database.

Calculator

Campaign revenue and costs

Easy to use

Start with four core values. Optional details stay hidden until you need a more precise estimate.

Transparent math

The result shows the figures used instead of presenting an unexplained score.

Planning estimate

Confirm contracts, taxes, attribution and accounting decisions with the appropriate professional.

Calculate ROAS, ad profit and break-even ROAS

Basic ROAS divides attributed revenue by advertising spend, but revenue is not profit. This calculator subtracts product or service cost, fulfillment and other variable costs, percentage fees, advertising spend and optional campaign overhead to provide a more useful profit view.

ROAS and ROI formulas

ROAS = ad revenue ÷ ad spend. Net ad profit = revenue − non-ad variable costs − ad spend − campaign overhead. The displayed ROI compares net profit with the entered ad spend and overhead.

Break-even ROAS formula

Contribution margin rate equals revenue left after variable non-ad costs divided by revenue. Break-even ROAS is 1 ÷ contribution margin rate. A 40% contribution margin therefore needs about 2.5x ROAS to cover ad spend before fixed overhead.

Use attribution data carefully

Ad platforms may claim the same sale, miss privacy-restricted conversions or include customers who would have purchased anyway. Compare platform reports with analytics and financial records, and use a target above break-even to allow for refunds, volatility and tracking uncertainty.

Frequently asked questions

What does ROAS mean?+

Return on ad spend measures attributed revenue divided by advertising cost and is usually shown as a multiple or percentage.

How do I calculate ROAS?+

Divide ad revenue by ad spend. $5,000 revenue from $1,000 spend equals 5.0x or 500% ROAS.

What is the difference between ROAS and ROI?+

ROAS compares revenue with ad spend. ROI compares profit with the broader investment or total costs used in the calculation.

Why can a high ROAS still lose money?+

Revenue must also cover product cost, fulfillment, payment fees, refunds and other variable costs before it becomes profit.

What is contribution margin?+

It is revenue left after variable non-ad costs. That amount is available to cover advertising and fixed overhead.

How is break-even ROAS calculated?+

Break-even ROAS equals one divided by contribution margin rate. A 40% contribution margin gives 2.5x break-even ROAS.

Should fixed overhead be included?+

This tool allows optional campaign overhead in net profit, while break-even ROAS is based on variable contribution margin.

Does attributed revenue prove the ad caused every sale?+

No. Attribution settings, repeat customers, tracking gaps and cross-channel effects can change the reported result.

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