Tools · Interactive

Geo Test Power Calculator

How many DMAs does a geo experiment need before it can detect your lift? Tune market count, expected lift, and noise to find out.

Interactive · Geo Test Power Markets create power Move the DMA count, expected lift, and market noise to see why 50 markets is a floor and 100 is a better target.

# DMAs (paired treat/control)50 True lift (%)3.0% Per-market noise (CV %)15%

Power now 0% Two-sided 5% approximation

Minimum DMAs for 80% 0 At current lift and noise

MDE at current N 0% Rough 80% detectable lift