A/B Test Sample Size Calculator
Calculate the required sample size for statistically significant A/B tests. Input baseline rate, minimum detectable effect, significance, and power.
Free Growth Calculators
12 toolsViral coefficient, NPS, cohort retention, A/B testing, and conversion calculators. Browse our free growth tools below — no sign-up required.
Activation Rate Calculator
Calculate your product activation rate by measuring the percentage of signups who complete a key action. Benchmark and optimize your onboarding funnel.
Cohort Retention Calculator
Calculate cohort retention rates across time periods. Visualize user retention curves, identify drop-off points, and benchmark retention by cohort size.
Conversion Funnel Calculator
Build and analyze a multi-step conversion funnel with up to 6 stages. Calculate step-by-step and overall conversion rates with visual funnel display.
DAU/MAU Ratio Calculator
Calculate your DAU/MAU stickiness ratio to measure user engagement. Benchmark against industry standards and model the impact on growth metrics.
Feature Adoption Rate Calculator
Calculate how many active users adopt specific features. Compare adoption rates across features to prioritize development and identify underused capabilities.
K-Factor Calculator
Calculate the K-factor (viral coefficient) for your product. Model compounding user growth across generations and optimize invitation and conversion rates.
NPS Score Analysis Calculator
Calculate Net Promoter Score from survey data. Analyze promoter, passive, and detractor distributions with benchmarks and improvement modeling.
Product-Market Fit Score Calculator
Calculate your product-market fit score using the Sean Ellis test. Measure what percentage of users would be "very disappointed" without your product.
Statistical Significance Calculator
Test whether your A/B test results are statistically significant using a two-proportion Z-test. See p-value, confidence interval, and effect size.
Time to Value Calculator
Calculate your product's median time to value (TTV) from signup to first value moment. Analyze onboarding efficiency and set TTV reduction targets.
Viral Coefficient Calculator
Calculate the viral coefficient (K-factor) of your product. Model referral-driven growth, project user curves, and determine if K > 1 for true virality.