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Lookalike Audience Size Estimator

Estimate lookalike audience size at 1%, 2%, 5%, 10% expansion, for Meta and Google.

Meta Google
LAL %Est. audience size
1%3,300,000
2%6,600,000
3%9,900,000
5%16,500,000
10%33,000,000
Tightest LAL (1%)
Highest similarity but smallest pool
Loosest LAL (10%)
Largest pool but lowest match quality

About this tool

Each lookalike % covers ~1% of country population at that similarity tier. 1% US = ~3.3M, 10% US = ~33M.

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