Free, instant calculations. No sign-up needed.
Free ROAS Calculator
See what your advertising returned, and what it needs to return to cover its cost.
Your estimate
- Return on ad spend
- 4×
- ROAS as a percentage
- 400%
- Break-even ROAS
- 2.5×
- Contribution after advertising
- $600.00
ROAS = attributed revenue ÷ ad spend. Break-even ROAS = 1 ÷ contribution margin. Contribution after advertising excludes fixed overhead and taxes. Use the same currency, reporting period and attribution window for both inputs.
Free ROAS Calculator
How to calculate ROAS
Return on ad spend is attributed revenue divided by advertising spend. If a campaign spends 1,000 and records 4,000 in attributed revenue, its ROAS is 4×, or 400%. That means four units of revenue for each unit spent on advertising. It does not mean a 400% profit. Enter figures in the same currency and from the same reporting period. The calculator updates locally in your browser without asking an AI model to perform the arithmetic.
Break-even ROAS starts with your margin
Revenue alone does not tell you whether a sale can support its advertising cost. Contribution margin is the share of revenue left after variable costs, before advertising. Include costs such as the product, fulfilment and payment processing where they apply. At a 40% contribution margin, break-even ROAS is 1 divided by 0.40, or 2.5×. This covers the included variable costs and advertising. Fixed overhead and taxes still need to be considered separately.
ROAS, ROI and contribution are different measures
ROAS compares revenue with ad spend. ROI compares a defined net return with a defined investment, so its meaning depends on which costs you include. This calculator also shows contribution after advertising: revenue multiplied by contribution margin, less ad spend. That number helps explain a campaign’s economics, but it is not a full profit-and-loss statement. Use consistent definitions when comparing channels or presenting results to a client.
Check attribution before comparing campaigns
Two platforms may both claim the same purchase, and different reporting windows can produce different revenue totals. A high reported ROAS can also include customers who would have purchased without the ad. This calculator does not connect to ad accounts or deduplicate attribution. Use a consistent revenue source, note the attribution window and explain material limitations in the report. A scenario is useful when the assumptions are visible.
Who it’s for
How it works
- Enter ad spend and revenue attributed to that advertising.
- Set your contribution margin after variable costs but before ads.
- Compare actual and break-even ROAS, then inspect contribution after advertising.
Tips for better results
- Use one currency and reporting period.
- Do not add overlapping platform revenue totals without review.
- Include your relevant variable costs when estimating margin.
Frequently asked questions
What is a good ROAS?
It depends on margin, overhead, customer economics and the reliability of attribution. There is no universal profitable multiple. Use break-even ROAS as one input to your assessment.
Why can’t ad spend be zero?
ROAS divides revenue by spend, so a zero denominator has no defined finite result. Enter positive spend; zero revenue is supported and returns zero ROAS.
Can I use it without signing up?
Yes. The calculation runs in your browser without an account or AI generation. Change the inputs as often as you need.