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StatTest - Free A/B Test Calculators
Free, open-source statistical calculators for A/B testing. Calculate sample sizes, run chi-squared tests, and compare means with Welch's t-test.
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86 % |
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Analytics-Toolkit.com - Statistical Tools for Online A/B Tests | Analytics ToolKit
State of the art tools for planning and analysis of A/B tests (a.k.a. online controlled experiments). Test 20-80% faster using our revolutionary approach to...
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85 % |
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A/B Test Duration Calculator - AB Math Sucks
Calculate how long your A/B test will actually take. Honest math for realistic timelines. No signup, no BS.
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85 % |
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CRO and A/B Testing Calculator
Calculate the conversion rate and statistical significance of your split tests and ab tests, as well as use a sample size calculator for pre-testing.
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84 % |
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abtestcalculators.com — Bayesian A/B test calculators for marketers
Free Bayesian A/B testing calculators and plain-English guides for PPC, SEO, CRO and growth marketers. No stats jargon required.
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84 % |
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ProABTest | Advanced A/B Testing Calculator
Free advanced A/B testing calculator for data scientists. Includes sample size, significance, Bayesian tests, power analysis, and more.
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82 % |
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StatCompute — 62 statistics calculators that show their work
Free statistics calculators for t-tests, ANOVA, chi-square, regression, confidence intervals, sample size and more. Every result comes with the formula, the...
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81 % |
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Testing Haven — Free A/B Testing Calculators
Free A/B testing calculators built for practitioners: combined frequentist + Bayesian analysis, sample size, power, MDE and duration, sequential testing, and...
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81 % |
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A/B Test Calculator
Determine whether or not your A/B tests are statistically significant with our free visual A/B test calculator.
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79 % |
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G-Test Calculator for AB Tests
Free online G-Test calculator for your AB test conversion rates
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79 % |
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Statistics calculators that show you how | Statoma
Use Statoma to calculate t-tests, p-values, confidence intervals, sample sizes, and chi-square tests with plain-English interpretation.
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78 % |
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SmartData Tools | Free Online Statistical Calculators
Free online statistical calculators for sample size, power analysis, clinical trial design, confidence intervals, t-tests, chi-square tests, BOIN dose-findin...
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78 % |
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Roughly Exactly
A small collection of browser-only analytical tools. Everything runs locally on your device.
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78 % |
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thericerca — Research statistics, done right
thericerca picks the correct statistical test for your data, computes every result in real Python — never guessed — and explains it in plain language.
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77 % |
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AssayProof — Analytical Chemistry Calculators for QC Labs
Free calculators for everyday QC lab work — molarity, dilution, calibration curves, LOD/LOQ, spike recovery — with the statistics certified against NIST.
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77 % |
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Convergence Calculator: Test Any Series, See Every Step
Free convergence calculator. Enter a series and get the ratio test, root test, radius and interval of convergence with the endpoint check worked out in full.
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77 % |
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PicoStat.com – Precision in the data — statistics, sensors, and analytics guides, plus the calculators every data-driven mind needs.
Statistics & data-science guides plus free tools — mean, median & mode calculator, standard deviation calculator, z-score calculator, sample size calculator,...
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76 % |
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A/B Test Statistical Significance Calculator, ABWex
Free A/B test calculator with frequentist Z-test and Bayesian analysis. Multi-variant comparison, revenue impact projections, sample size calculator, and vis...
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76 % |
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Product Wizardry · Tools for teams that run experiments
Free A/B testing calculators for sample size, significance and sample ratio mismatch, plus Loupe: the weekly product roundtable for teams that experiment.
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76 % |
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Stratafy - Stratified A/B Testing Platform
Stratafy.io: Optimize your A/B testing with stratification. Target relevant user segments to improve your test results.
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76 % |
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