Math
Free Math calculators with instant results, clear explanations and worked examples — no sign-up, available in 9 languages.
From percentages, fractions and ratios to averages, exponents and geometry, these calculators handle the everyday arithmetic that is easy to get wrong by hand. They are built for homework, quick checks at work and any moment you want a worked answer with the steps, not just a number.
All Math calculators
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Exponential Growth & Decay
Exponential growth or decay calculator using N₀·e^{kt} or N₀·(1±r)^t. Get value at any time, doubling time or half-life, and a plotted curve.
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Fraction Calculator
Fraction calculator: add, subtract, multiply, and divide fractions. LCM steps shown, plus simplified, mixed-number, decimal and pie visuals.
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Matrix Calculator
Matrix operations calculator: add, subtract, scalar-multiply, multiply, transpose, find the determinant and inverse of matrices up to 3×3, with a heatmap.
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Percentage Calculator
Percentage calculator: find X% of Y, what percent one number is of another, percentage increase or decrease, and add or subtract a percent. Free.
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Permutations & Combinations Calculator
Permutations (nPr) and combinations (nCr), plus with-repetition variants, factorial expansions, and a Pascal's-triangle view. Free nPr/nCr calculator.
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Prime Factorization Calculator
Prime factorization with an interactive factor tree, exponential form, and the GCF and LCM of two numbers. Free, instant — no sign-up needed.
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Quadratic Equation Solver
Quadratic formula calculator with steps: real or complex roots, discriminant, vertex, axis of symmetry, and a plotted parabola. Solve ax2+bx+c=0 free.
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Scientific Notation & Significant Figures Calculator
Convert any number to scientific, E and engineering notation, count significant figures, and round to chosen sig figs — with a magnitude number line.
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Slope & Line Equation Calculator
Find slope and equation of a line from two points: slope-intercept, point-slope and standard forms, intercepts, midpoint, distance and angle, with a graph.
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Standard Deviation Calculator
Calculate mean, median, mode, standard deviation, variance, quartiles, IQR and outliers from a data set, with a histogram and ±σ bands. Free.
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System of Equations Solver
Solve 2×2 and 3×3 linear systems using Cramer's rule. See the unique solution, or whether the system has no solution or infinitely many, with a graph.
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Triangle Solver
Solve any triangle from sides or angles using Law of Sines and Cosines. Get all six elements, area, perimeter, circumradius and inradius, with a diagram.
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Z-Score & Normal Distribution
Z-score calculator: convert a raw score to a z-score and find left, right, between and two-tailed probabilities, with a shaded normal curve. Free.
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