Math & Numbers
Test paired binary categorical changes with exact binomial or continuity-corrected chi-square McNemar test
mcnemar-test-calculatorMath & Numbers
Calculate mean absolute deviation around the mean or median for an easy-to-read spread measure
mean-absolute-deviation-calculatorMath & Numbers
Calculate the midrange of a numeric dataset as the average of its minimum and maximum values
midrange-calculatorMath & Numbers
Calculate the arithmetic mean of a numeric dataset and review the main supporting statistics
mean-calculatorMath & Numbers
Find the median of a dataset, inspect the sorted sequence, and optionally review quartiles and interquartile range
median-calculatorMath & Numbers
Compute the inverse of a square matrix using Gauss-Jordan elimination and report when inversion is impossible
matrix-inverse-calculatorMath & Numbers
Multiply two matrices and return the product with dimension checks and optional step explanations
matrix-multiplication-calculatorMath & Numbers
Perform core matrix operations including addition, multiplication, inverse, determinant, trace, and rank
matrix-calculatorMath & Numbers
Solve common percentage questions including percentage of a total, value from a percentage, and percentage change
math-percentage-calculatorMath & Numbers
Convert miles to kilometers with configurable decimal precision
miles-to-kmMath & Numbers
Convert meters to feet with configurable decimal precision
meter-to-feetMath & Numbers
Calculate markup, selling price, and profit based on cost and markup percentage
markup-calculator