Math calculators
Quadratic Graphing Calculator — Vertex, Roots & Steps
Type a quadratic function to graph and solve it instantly, or edit standard, vertex and root forms. Trace the parabola and see roots, vertex, domain, range and steps.
Fraction Calculator — Mixed Numbers, Steps & Visuals
Calculate, simplify, convert, compare, and order exact fractions; generate equivalents and LCD forms or explore an interactive fraction wall.
Scientific & Graphing Calculator — DEG/RAD, History & Memory
Evaluate safe scientific expressions with DEG or RAD mode, memory, history, result formatting, and an interactive graph for up to three functions.
Confidence Interval Calculator
Estimate a population mean or proportion from your sample. Use raw data, summary statistics or success counts, and compare confidence levels visually.
Derivative Calculator
Differentiate a function or implicit equation. Follow each rule, explore the curve and inspect regular, vertical or singular tangent points.
Eigenvalue & Eigenvector Calculator
Find eigenvalues, full real or complex eigenvector bases and multiplicities. Explore the transformation and check diagonalization over real and complex numbers.
GCF and LCM Calculator
Find the greatest common factor and least common multiple of several whole numbers. Explore equal chunks and repeating cycles with exact counts and steps.
Linear Regression Calculator
Fit a line to paired measurements, inspect residuals, compare mean and individual prediction intervals, and explore the influence of one point.
Long Division Calculator
Divide whole numbers and decimals with exact answers and place-value working. Follow the steps or try each quotient digit with immediate feedback.
Matrix Calculator
Calculate with exact matrices. Inspect each product cell, follow row operations and solve systems with unique, infinite or no solutions.
P-Value Calculator
Convert a z, t, chi-square or F statistic to a p-value. Inspect the selected tail and copy a reproducible result.
Polynomial Long Division Calculator
Divide polynomials exactly. Explore quotient, remainder and step-by-step subtraction in columns aligned by power, including fractions and missing terms.
Random Number Generator — One Number or a Unique Sample
Generate one number from a clearly labelled inclusive range, or create, sort, copy and download a larger random sample.
Ratio Calculator
Simplify ratios, scale quantities, split a total and solve proportions exactly. Fractions, editable examples and clear visual comparisons.
Sample Size Calculator
Plan completed survey responses, expected invitations and sampling precision. Explore the trade-off between sample size and margin of error.
Standard Deviation Calculator
Calculate sample or population standard deviation from a list or frequency table. Explore real data points, their distances and contributions to spread.
Triangle Calculator
Solve a triangle from three known measurements. See all sides, angles, area and heights, and compare both possible SSA shapes on one scale.
