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Tomi.ai’s A/B Testing Calculator

We’ve created this free A/B testing calculator tool to offer you access to the insights that matter most to you! Simply input your total sample size, along with the number of conversions!

Samples
The number of users, sessions or impressions depending on your KPI
Conversions
The number of clicks or goal completions
Input values...
... to find out if your test results are statistically significant
Probability to be Best
Each variation's long-term probability to out-perform all other live variations, given collected data since the creation or change of any variation included in the test
100
80
60
40
20
0
  Samples Conversions Conversion Rate Probably to be best
Each variation's long-term probability to out-perform all other live variations, given collected data since the creation or change of any variation included in the test
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What if I want to dive deeper and discover different aspects of my data? 

You can definitely use this tool to test any standard hypothesis Bayesian equation. With this free calculator, you can test up to 10 variations at a time!

Here’s how to get the most out of this calculator

  • To get proper results for variations such as users, sessions, or impressions we recommend breaking each variation into separate categories

  • Once you separate the variation data, simply input the number of samples per variation, along with the number of conversions (such as clicks and goal completions).

  • A good rule of thumb is to always double check your KPIs to get the most accurate and relevant results.

  • Lastly — click “Calculate” — and you’re good to go! ✅

Please Note

Our free A/B testing calculator gives you insights based off of binary models

→ To get the most out of your data, consider signing up for Tomi.ai to expand beyond binary models and into the realm of AI-powered predictive technology! Learn more here