Enter Your Numbers
Your Ad Accounts
Add a row for each ad account. Enter the spend and the revenue (purchase conversion value) for the same period.
Common Questions
Frequently Asked Questions
What is blended ROAS across multiple ad accounts?
Blended ROAS across multiple ad accounts is your total ad-driven revenue divided by your total ad spend across every account combined. If account A spent 5,000 and returned 20,000 in revenue, and account B spent 5,000 and returned 5,000, your blended ROAS is 25,000 / 10,000 = 2.5x - even though account A is at 4.0x and account B is at 1.0x. The blend is the honest top-line number, but it hides how differently each account is performing.
Why would I have more than one Meta ad account?
Operators run multiple ad accounts for several reasons: an ad account gets disabled or banned and they spin up a new one to keep selling; they separate prospecting from retargeting; they split spend by brand, region, or agency; or they run a backup account in case the primary is restricted. When that happens, platform dashboards report each account in isolation, so the only way to see true blended performance is to combine them yourself.
How does a single weak ad account drag down my ROAS?
Because blended ROAS is weighted by spend, a high-spend account with low ROAS pulls the blended number toward its level. A brand-new ad account still in the learning phase, or a replacement account after a ban, often runs at a low ROAS for the first few weeks. If you only look at the blended number, that drag looks like 'ads got worse' when really one specific account needs attention - which is exactly what the per-account breakdown above surfaces.
Is a good ROAS the same for every account?
No. A 'good' ROAS depends on your gross margin, fulfillment cost, and how much of the order is profit. A 2.0x ROAS can be profitable for a high-margin product and a loss for a low-margin one. That is why this calculator focuses on comparing accounts against each other and against your blended number, rather than declaring one universal target. To know the real profit behind each account's ROAS, you need your margins and costs in the same view.
ROAS vs MER - which should I use?
ROAS measures revenue against the spend in a specific ad account (or platform). MER (Marketing Efficiency Ratio) measures your entire store's revenue against your entire ad spend, including organic sales. Use per-account ROAS to find which accounts to scale or fix, and use MER to sanity-check whether your total marketing spend is sustainable. They answer different questions - this tool covers the per-account and blended ROAS side.
Can MerchantFlow blend my ad accounts automatically?
Yes. MerchantFlow connects multiple Meta ad accounts per store - including accounts under different Facebook logins - and pulls their spend and revenue into one P&L. You get blended ROAS and per-account ROAS updated automatically, sitting next to your real profit after COGS, fees, shipping, and refunds. You can also choose which accounts to sync, and each newly added account backfills its full history.