A/B Test Significance Calculator
Make data-driven decisions with confidence using our professional statistical analysis tool.
Test Parameters
Variant A (Control)
Variant B (Test)
Confidence Intervals
The range within which the true conversion rate is likely to fall with 95% confidence. Wider intervals indicate less certainty in the results.
Sample Size
Larger sample sizes provide more reliable results. The minimum sample size is calculated based on your baseline conversion rate and desired detectable effect.
Statistical Significance
95% significance is the standard threshold for making decisions. This means there's less than a 5% chance the observed difference is due to random chance.