Statistics & Algebra calculators & tools
Analyze datasets, solve equations, work with matrices and explore probability, normal distributions, z-scores and confidence intervals.
Standard Deviation Calculator
Calculate sample and population standard deviation, variance, mean and median from a list of numbers.
Open tool →Statistics & AlgebraStatistics Calculator
Calculate count, sum, mean, median, mode, range, variance and standard deviation from a dataset.
Open tool →Statistics & AlgebraQuadratic Equation Solver
Solve ax² + bx + c = 0 for real or complex roots and calculate the parabola vertex.
Open tool →Statistics & AlgebraMatrix Calculator — 2×2
Calculate determinant, trace, inverse and A×B product for two 2×2 matrices.
Open tool →Statistics & AlgebraLinear Equation Solver — 2 Variables
Solve two simultaneous linear equations in x and y using a 2×2 coefficient system.
Open tool →Statistics & AlgebraProbability Calculator
Calculate union, conditional probabilities and an independence benchmark from P(A), P(B) and P(A∩B).
Open tool →Statistics & AlgebraCombination & Permutation Calculator
Calculate nCr combinations, nPr permutations and n factorial for counting problems.
Open tool →Statistics & AlgebraZ-Score Calculator
Calculate how many standard deviations a value lies above or below a mean.
Open tool →Statistics & AlgebraNormal Distribution Calculator
Calculate normal-distribution z-score, cumulative probability, upper-tail probability and density.
Open tool →Statistics & AlgebraConfidence Interval Calculator
Estimate a z-based confidence interval for a mean from sample mean, standard deviation and sample size.
Open tool →About these statistics & algebra tools
These calculators show the formulas and assumptions behind common algebra and statistics operations so results can be checked and reused in coursework, data analysis and engineering calculations.
Every utility includes an interactive result plus an explanation, example, common questions and links to closely related calculators.