Why "3x ROAS" is meaningless without knowing your margin
ROAS (return on ad spend) tells you revenue generated per ringgit of ad spend, but revenue isn't profit — a 3x ROAS is highly profitable for a product with 70% gross margin and a straight loss for one with 20% margin and heavy shipping costs. The generic benchmarks floating around ("aim for 3-4x ROAS") apply to nobody's actual business, because they don't know your margin structure. The only ROAS number that means anything for your business is your own break-even ROAS — the point at which ad spend exactly consumes your margin, calculated from your actual gross margin and shipping/fulfilment costs, not a rule of thumb borrowed from a different category.
This calculator also separates "current ROAS" from "break-even ROAS" so you can see the gap between them directly — that gap, not the ROAS number itself, is what actually tells you whether a campaign is healthy or should be paused. A campaign running at 2.5x ROAS against a 2.2x break-even is barely profitable and fragile to any cost increase; the same 2.5x against a 1.4x break-even has real room to scale.
What this calculator doesn't capture
This isolates the ad-spend-to-margin relationship specifically — it doesn't account for fixed overheads, platform or payment processing fees, returns/refunds, or customer lifetime value beyond the first order, so treat the output as a directional planning figure rather than a full profit-and-loss statement. For lead-generation businesses rather than e-commerce, the equivalent tool is our break-even CPL calculator. For the e-commerce vertical specifically, see e-commerce marketing, and for the ad management layer once your numbers are dialled in, Meta Ads.