Data & Analytics Calculators
70 free data & analytics calculators in Math.
- A/B Test Duration CalculatorWork out how long an A/B test must run to reach its required sample size.
- A/B Test Sample Size CalculatorCalculate the sample size needed per variant to detect a given lift.
- A/B Test Significance CalculatorTest whether the difference between two conversion rates is statistically significant.
- Absolute Risk Reduction CalculatorCalculate absolute risk reduction and the number needed to treat.
- AIC CalculatorCompare models using the Akaike information criterion.
- Attribution Model CalculatorCompare how attribution models split conversion credit across touchpoints.
- Autocorrelation CalculatorMeasure autocorrelation at a given lag and test for serial dependence.
- Bayes Factor CalculatorCalculate a Bayes factor to compare the evidence for two hypotheses.
- Bootstrap Sample Size CalculatorDetermine the number of bootstrap resamples needed for stable estimates.
- CAC Payback Period CalculatorCalculate how many months it takes to recover customer acquisition cost.
- Coefficient of Variation CalculatorExpress standard deviation relative to the mean for scale-free comparison.
- Cohen's D CalculatorCalculate Cohen’s d with the small-sample Hedges correction.
- Cohort Retention CalculatorTrack retention across periods for a cohort and find where users are lost.
- Confidence Band CalculatorCalculate a confidence band around a fitted regression line.
- Confidence Level CalculatorConvert between confidence level, critical value and margin of error.
- Critical Value CalculatorFind critical values for one and two-tailed tests at a chosen significance level.
- Degrees of Freedom CalculatorCalculate degrees of freedom for common statistical tests.
- Effect Size CalculatorCalculate a standardised effect size between two group means.
- Exponential Moving Average CalculatorCalculate an exponential moving average and its smoothing factor.
- Extrapolation CalculatorExtend a trend beyond the observed data and quantify the growing uncertainty.
- Fisher Exact Test CalculatorCalculate the Fisher exact test probability for a 2×2 contingency table.
- Forecast Error CalculatorMeasure forecast accuracy using absolute, squared and percentage error metrics.
- Geometric Growth CalculatorProject geometric growth and find the constant rate that links two values.
- Harmonic Mean Rate CalculatorCalculate the harmonic mean, the correct average for rates and ratios.
- Hedges G CalculatorCalculate Hedges’ g, the small-sample corrected standardised mean difference.
- Kendall Tau CalculatorCalculate Kendall’s tau rank correlation from concordant and discordant pairs.
- Kruskal Wallis CalculatorPerform a Kruskal-Wallis test comparing three or more independent groups.
- Kurtosis CalculatorMeasure the tail weight of a distribution relative to a normal distribution.
- Likelihood Ratio CalculatorCalculate positive and negative likelihood ratios for a diagnostic test.
- Linear Interpolation CalculatorEstimate a value between two known data points.
- Mann Whitney U CalculatorPerform a Mann-Whitney U test comparing two independent samples.
- Mean Absolute Percentage Error CalculatorCalculate MAPE and understand its limitations near zero.
- Monte Carlo Sample Size CalculatorDetermine how many Monte Carlo iterations are needed for a target precision.
- Moving Average CalculatorCalculate a simple moving average and the smoothing it provides.
- Net Revenue Retention (NRR) CalculatorCalculate net and gross revenue retention from expansion, contraction and churn.
- NPS CalculatorCalculate Net Promoter Score from promoter, passive and detractor counts.
- Number Needed to Harm CalculatorCalculate the number needed to harm from adverse event rates.
- Number Needed to Treat CalculatorCalculate the number needed to treat and compare it against harms.
- Partial Correlation CalculatorCalculate the correlation between two variables controlling for a third.
- Point Biserial Correlation CalculatorCalculate the correlation between a binary and a continuous variable.
- Power Analysis CalculatorCalculate statistical power for a given effect size and sample size.
- Prediction Interval CalculatorCalculate a prediction interval for a single new observation.
- Probability Ratio CalculatorCompare two probabilities as a ratio and as an odds ratio.
- R SquaredFree R Squared calculator with clear step-by-step results.
- Regression Coefficient CalculatorCalculate the slope coefficient of a simple linear regression and test it.
- Regression Intercept CalculatorCalculate the intercept of a linear regression and interpret it correctly.
- Relative Risk Reduction CalculatorCalculate relative risk reduction from control and treatment event rates.
- Residual Standard Error CalculatorCalculate residual standard error and what it says about model fit.
- Risk Ratio CalculatorCalculate relative risk between an exposed and unexposed group.
- ROAS/ROI CalculatorCalculate return on ad spend and true return on investment after cost of goods.
- Root Mean Square CalculatorCalculate the root mean square of a set of values.
- Seasonality Index CalculatorCalculate seasonal indices and deseasonalise a series.
- Sign Test CalculatorPerform a sign test on paired data using only the direction of differences.
- Skewness CalculatorMeasure the asymmetry of a distribution and what it implies for analysis.
- Spearman Rank CalculatorCalculate Spearman’s rank correlation from ranked data.
- Standard Error CalculatorCalculate the standard error of a mean and how it shrinks with sample size.
- Standard Error of Mean CalculatorCalculate the standard error of a sample mean with a finite population correction.
- Standard Error of Proportion CalculatorCalculate the standard error and margin of error for a sample proportion.
- Statistical Power CalculatorCalculate the power of a proportion test and the effect it can detect.
- Survey Margin CalculatorCalculate the margin of error for a survey result at a chosen confidence level.
- Survey Response Rate CalculatorCalculate survey response rate and the completed responses a target requires.
- Tracking Signal CalculatorDetect systematic forecast bias using a tracking signal.
- Trend Projection CalculatorProject a linear trend forward and quantify its fit.
- Trimmed Mean CalculatorCalculate a trimmed mean that discards extreme values before averaging.
- Variance Inflation Factor CalculatorDetect multicollinearity between predictors using the variance inflation factor.
- Viral Coefficient CalculatorCalculate the viral k-factor and whether growth is self-sustaining.
- Weighted Mean CalculatorCalculate a weighted average where observations carry different importance.
- Weighted Moving Average CalculatorCalculate a weighted moving average that emphasises recent periods.
- Wilcoxon Test CalculatorPerform a Wilcoxon signed-rank test for paired non-parametric data.
- Winsorized Mean CalculatorCalculate a Winsorized mean where extreme values are capped rather than discarded.