Free Meta Ads Calculators

Quick math for decisions you make every week: Is your A/B winner real? Does your MER match what the platforms claim?

Use these free tools on live campaign data. No signup required. Each calculator links to a deeper guide on the same topic.

A/B Test Significance Calculator

Compare control vs. variants on conversions. Get statistical confidence, learning-phase warnings, and reach-parity checks before you scale a Meta ad winner.

Open A/B calculator

MER Reality Check Calculator

Enter revenue, total marketing spend, and per-channel ROAS. See your marketing efficiency ratio and how much attributed revenue exceeds real revenue.

Open MER calculator

Related guides

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