Calculate the necessary sample size reach 95% confidence for your A/B Test Conversion Rate* Goal Lift Index* CALCULATE * Conversion Rate: To calculate conversion rate, divide the number of KPI success events by the number of unique visitors. For instance, orders/visitors. * Goal Lift Index: An index of 100 means flat results, or no lift. An index of 110 means a 10% increase from the current response rate. Enter the desired lift index you would like to see with your test. * Have more than two recipes? No problem! Just multiply the necessary sample size per recipe by the number of recipes in your experiment. Sample Size per Recipe Response Rate per Recipe Control Test Group 95% confident that roll-out results would be between Difference Index 2 x Standard Deviation: Evan VermilyeaCalculator – Sample Size08.08.2018 Get analytics tips and insights delivered to your inbox.