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> Calculate the required audience size.
> Standard Evan Miller formula.
Calculate the required sample size for your A/B test. Based on Evan Miller's formula. Fast browser-based workflow, no sign-up, multilingual-ready.
A/B Test
Statistical significance (Z-test) and confidence intervals.
ROAS Calculator
Calculate return on ad spend, break-even ROAS, CPA, CPC, and margin-aware paid acquisition thresholds.
ROI Calculator
Ad spend ROI and unit economics calculator.
UTM Builder
Marketing link constructor with validation and presets.