A/B Test Calculator

A/B Test Calculator helps you determine statistical significance of an A/B experiment. Use this free browser-based calculator from XTRAW Tools to compare inputs, estimate results, and plan your next step.

How to Use the A/B Test Calculator

1. Enter the required calculator inputs shown in the form.
2. Review the probability, experiment, sample, velocity, acceleration, distance, force, angle, or physics assumptions.
3. Run the calculator, then adjust one input at a time to compare scenarios or check your estimate.

What This Calculator Helps With

Determine statistical significance of an A/B experiment. It is designed for marketers, ecommerce teams, analysts, agencies, product managers, students, and anyone comparing A/B test results who want a fast, browser-based estimate before relying on a spreadsheet, textbook, analytics platform, physics software, research software, professional source, or specialist.

• Visitors — Control (A): 2000
• Conversions — Control (A): 200
• Visitors — Variant (B): 2000
• Conversions — Variant (B): 240

Common Uses

People use this calculator when they need a quick way to compare experiment conversion rates and review statistical significance before making campaign decisions.

• SEO Optimization: Review A/B test conversion evidence before making campaign, landing-page, or content optimization decisions.
• Content Planning: Compare test results and conversion assumptions for marketing experiments or content tests.
• Math Solving: Solve probability, combinatorics, A/B testing, effect size, physics, motion, force, or work formulas from entered values.
• Project Planning: Plan lessons, experiments, research, STEM assignments, campaign tests, or analysis workflows using transparent formulas.

Formula or Method

Z = (p_B − p_A) / SE_pooled; p-value from standard normal

Example

Example inputs: Visitors — Control (A): 2000; Conversions — Control (A): 200; Visitors — Variant (B): 2000; Conversions — Variant (B): 240

Example result: Using the default inputs, control conversion is 10.00%, variant conversion is 12.00%, z is 2.02, and two-sided p-value is about 0.0432.

Related Tools

• Conversion Rate Calculator
• Confidence Interval Calculator
• Sample Size Calculator
• Effect Size Calculator
• Standard Error Calculator
• Z Score Calculator

A/B Test Calculator FAQ

Is the A/B Test Calculator free?

Yes. This calculator is free to use on XTRAW Tools.

Do I need to create an account?

No. XTRAW tools are designed for browser-based use without requiring an account.

Are the results exact?

Results may be estimates depending on the inputs, formula, rounding, selected method, probability model, physics assumption, or purpose of the calculator. Always verify important results before relying on them.

Disclaimer: This calculator is provided for general informational, educational, and convenience purposes only. It is not legal, financial, marketing-strategy, statistical consulting, analytics, regulatory, academic, or professional advice. Always verify important results with a qualified professional, statistician, analytics platform, experiment data, or authoritative source before making decisions.