A/B Test Sample Size Calculator

Try:
%
%

Significance

Power

Visitors per variant

13,914

Fill both experiment arms

A50% traffic

2,500 / 13,914

B50% traffic

2,500 / 13,914

Total visitors needed
27,828
Days at your traffic
5.6 days
Target conversion rate
3.60%
Allocation
50 / 50

Two-sided fixed-horizon test

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