Calculate nPr permutations and nCr combinations with and without repetition.

Calculate any k-th percentile using linear interpolation or nearest rank, and find the percentile rank of a test score or metric.

Calculate Pearson correlation r, coefficient of determination r², sample covariance, t-statistic, exact p-value, and Fisher Z 95% CI.

Automate 80/20 rule Pareto analysis, sort categories by descending impact, calculate cumulative percentages, and assign ABC classifications.

Calculate p-values across Z, Student’s t, and Chi-Square distributions.

Convert betting and probability odds between American (+/-), Decimal, Fractional, and Implied Probability with instant payout and profit calculations.

Calculate Gaussian bell curve areas, cumulative probabilities, and bounds.

Perform Ordinary Least Squares (OLS) multiple linear regression with 2 or 3 predictors, R², adjusted R², F-test, and ANOVA table.

Find the most frequent values in any dataset with automatic classification of unimodal, bimodal, multimodal, or uniform data.

Find exact midpoint coordinates, trisection points, or missing endpoints in 2D plane and 3D coordinate space.