A/B Test Calculator
Compare control and variant conversion counts to estimate lift, confidence, and whether a test result is strong enough to act on.
Use completed visitor and conversion counts from a simple two-variant test. This is a directional two-proportion z-test, not a replacement for proper experiment design.
Control Rate
0%
Variant Rate
0%
Relative Lift
0%
Confidence
0%
Absolute Lift
0 pts
Extra Conversions
0
Z-Score
0.00
Decision
-
Interpretation
Enter valid visitor and conversion counts to compare two variants.
Ready.