What is ROAS?
ROAS is the revenue you earn for every dollar you spend on ads. A 4.0 ROAS means four dollars back for every dollar in.
It is the fastest read on whether a paid channel is paying for itself, which is why most marketing teams check it before almost anything else. It does have one blind spot, covered below: it measures revenue, not profit.
The ROAS formula.
ROAS = revenue attributed to ads / ad spend.
The result is usually written three ways: a multiple (4.0x), a ratio (4:1), or a percentage (400%). All three say the same thing. The calculator above shows all three so you can use whichever your team reports in.
A worked example.
Spend 5,000 dollars on a campaign. It drives 20,000 dollars in attributed revenue.
ROAS is 20,000 divided by 5,000, which is 4.0. For every dollar of spend, the campaign returned four. Written as a ratio, that is 4:1. As a percentage, 400%.
What is a good ROAS?
The honest answer is that it depends on your margin, because ROAS measures revenue, not profit.
A 4:1 ROAS is a common baseline, but the number that actually matters is your break-even ROAS, which is 1 divided by your gross margin. At an 80% gross margin you break even at 1.25x. At a 25% margin you do not break even until 4.0x. Two companies can both run a 3.0 ROAS, and one is making money while the other is losing it. Switch the calculator to break-even mode to find your line, then judge every campaign against it.
As a rough read for B2B SaaS:
- Under 1.0 — the ad dollar is underwater before you even count overhead.
- 1.0 to 3.0 — usually working, but sitting close to break-even once margin is in.
- 3.0 to 5.0 — healthy for most.
- Above 5.0 — strong, and often a signal to spend more, not less.
How to improve your ROAS.
There are two ways to move it: raise the revenue per visit, or lower the cost per result.
Both have a ceiling, because paid channels charge you for every click whether it converts or not. The structural move is to add a channel that does not. Organic search compounds: the content you rank today keeps returning visits next quarter at no extra cost per click, which pulls your blended return up and your blended acquisition cost down.