A/B Test Statistical Significance Calculator

Calculate statistical significance, lift, and confidence levels for your A/B tests.

Visitors

Conversions

Conversion Rate

5.00%

Visitors

Conversions

Conversion Rate

5.75%

Confidence Level

Conversion Rate Comparison

Control

5.00%

Variant

5.75%

Statistical Results

Lift

+15.00%

P-Value

0.0012

Confidence Interval

±0.47%

Z-Score

3.07

Sample Size Calculator

Baseline Conversion Rate (%)

Minimum Detectable Lift (%)

Sample Size Per Group (95% confidence, 80% power)

8,239

Test History

Test Name	Control Rate	Variant Rate	Lift	Status
Checkout Button Color	5.00%	5.75%	+15.00%	Significant
Email Subject Line	12.50%	13.20%	+5.60%	Running