Calculate line of best fit (Y = a + bX), slope, intercept, and predictions.

Solve single-variable linear equations and analyze two-variable lines with slope-intercept form, intercepts, and steps.

Measure fourth standardized moment, Fisher excess kurtosis, and tail outlier risk.

Perform the Kruskal-Wallis H-test on ranks for comparing three or more independent groups with tie adjustments and Chi-Square p-values.

Calculate IQR (Q3 – Q1), semi-interquartile range, inner and outer Tukey fences, and automatically flag statistical outliers.

Solve linear and quadratic inequalities with sign-flip logic on negative division, interval notation, and set builder formats.

Free Hypergeometric Distribution Calculator. Calculate exact probability P(X=k), cumulative CDF, mean, and variance for sampling without replacement.

Calculate the exact area of any triangle from its three side lengths using Heron

Free harmonic mean calculator. Compute the harmonic mean, geometric mean, and arithmetic mean for speeds, rates, P/E ratios, and finance datasets.

Calculate Geometric Mean, Harmonic Mean, Root Mean Square (RMS), Arithmetic Mean, and verify the AM-GM-HM inequality.