ROAS Calculator
Compare attributed revenue against ad spend and estimate contribution after ads using your margin, order count and other variable costs. Multiple scenarios produce a blended revenue-to-spend ratio.
Your result
How the calculation works
ROAS = revenue/spend. Contribution after ads = revenue × gross-margin fraction − other variable costs − ad spend. Break-even ROAS = (spend + other costs)/(spend × margin). CPA = spend/orders when orders exceed zero.
Worked example
Revenue of $4,000 on $1,000 spend gives 4× ROAS. With 40% gross margin and $100 other variable costs, contribution after ads is $500; break-even ROAS is 2.75×.
Assumptions and limitations
ROAS is revenue efficiency, not profit. Enter attribution and margin consistently; unentered overhead, taxes, refunds, repeat purchases and platform fees are excluded. Blended MER here uses the revenue and spend in your supplied scenarios, not independently verified company accounts.
Use the same reporting window across scenarios. Avoid summing overlapping attributed revenue from different platforms. A favourable ratio does not establish causality or incremental sales.
Method reviewed 2026-10-08. Calculation standards · Report an issue