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About this tool
Calculate Return on Ad Spend (ROAS), cost-to-revenue ratio, P&L, conversion funnel, and campaign scenarios.
The ROAS Calculator divides attributed revenue by ad spend to give Return on Ad Spend, then uses your product margin to work out the break-even ROAS — 1 ÷ net margin — that separates a campaign that looks good from one that actually makes money. At a 30% net margin the break-even is 3.33×, so a 2.5× ROAS is a loss even though the ads returned more revenue than they cost. It is for performance marketers and store owners who need the profit answer, not just the revenue multiple.
Open ROAS Calculator on AltFTool — it loads instantly in your browser.
In the 'ROAS Calculator' tab enter 'Ad spend' and 'Campaign revenue' (currency PLN, INR, USD or EUR) and set 'Gross margin (%)' with the slider or a 15–70% preset.
Press 'Add optional data: conversions and clicks' to include Conversions and Clicks for the funnel metrics.
Read the ROAS, ROI and Break-even ROAS cards plus the estimated result after costs; 'Show supporting metrics: CPA, CPC, AOV and CR' reveals the rest.
It converts your margin into the minimum ROAS for zero profit, so every result is judged against a threshold instead of against zero.
Estimated profit is revenue × net margin − spend, and ROI is that profit over spend, so a revenue-positive campaign that destroys money is visible immediately.
Add clicks and conversions and it derives CPA, CPC, average order value and conversion rate, showing where a weak ROAS is actually coming from.
ROAS = attributed revenue ÷ ad spend. Spend 10,000 and attribute 50,000 in revenue and the ROAS is 5×, usually written as 5:1 or 500%. It measures revenue returned per unit of spend and says nothing about profit on its own.
Anything above your break-even ROAS, which is 1 ÷ net margin. At a 50% margin break-even is 2×, at 30% it is 3.33×, and at 20% it is 5× — which is why one advertiser's excellent 4× is another's loss. The calculator computes the threshold from the margin and variable costs you enter.
ROAS is a revenue-to-spend ratio; ROI is a profit percentage. Here profit is revenue × net margin − spend and ROI is profit ÷ spend × 100, so a campaign can post a 4× ROAS and a negative ROI whenever margin is thinner than 25%.
Maximum spend = target revenue ÷ target ROAS, and the revenue you need from a given budget = spend × target ROAS. The budget planner reports both plus the ROAS implied by a spend and revenue pair, so you can sanity-check a target before committing to it.
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