ROAS Calculator
Revenue over ad spend, computed honestly and immediately qualified: beside it, the break-even ROAS your contribution margin actually demands, and the ROMI that says whether money was made.
Includes the original principal and all proceeds you want counted.
Fees and income
As reported by your ad platform. Attribution is a claim, not proven incrementality.
What is left from each revenue dollar after product, shipping and payment costs. Required for any profit number.
Included
Not included
Show the math
A ratio is not a verdict
ROAS answers one narrow question well: how much attributed revenue each ad dollar produced. Everything else people read into it comes from context it does not carry. The break-even line depends entirely on margin; comparability across campaigns depends on attribution windows; and profitability depends on costs ROAS never sees. This page pairs the ratio with that context: break-even ROAS from your margin, campaign contribution and ROMI beside it, and scenarios that show how fast a healthy-looking ratio degrades when revenue slips 10% or margin drops 5 points.
ROAS FAQ
How do I calculate ROAS?
Attributed revenue divided by ad spend: $10,000 of revenue from $2,000 of spend is a ROAS of 5, sometimes written 5:1 or 500%. Enter both above and it computes live. What ROAS does not contain is any cost: product, shipping, payment fees, agency, tools. It is a reach efficiency metric wearing a profit metric’s clothes.
What ROAS do I need to break even?
Break-even ROAS = 1 / contribution margin, when ad spend is the only marketing cost, and (M / m) / ad spend generally. At a 25% margin you need a 4.0 just to break even; at 50%, a 2.0. Enter your margin above and the break-even ROAS tile computes yours; anything below it loses money regardless of how green the platform dashboard looks.
Why do my platform and my accountant disagree about ROAS?
Attribution. Platforms count conversions within their window and model (click-through, view-through, modeled), which can overlap with organic purchases and with each other across platforms. Finance counts bank deposits. Neither is lying; they measure different things. This page labels the input attributed revenue for that reason, and the honest response to the gap is incrementality testing, not averaging.
Should I optimize for ROAS or ROMI?
ROMI, with ROAS as the diagnostic. Maximizing ROAS pushes budgets toward easy, small, retargeting-heavy audiences (impressive ratio, little added profit); ROMI weighs the contribution your margin actually keeps against the full marketing cost. This calculator shows both side by side precisely so the divergence is visible when it starts.
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