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Free Online Math Calculators

Use our free math calculators for percentages, fractions, geometry, matrices, unit conversion and more. Every tool runs in your browser or on our server — no app install, no sign-up required.

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Basic Calculation

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Arithmetic & Algebra

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Percentage Calculate percentages, increases, and decreases. Fraction Add, subtract, multiply, and divide fractions. Ratio Solve proportions and simplify ratios. Average Find mean, median, and average of a dataset. Exponent & Root Calculate powers and bases. Square Root & N-th Root Find square roots and radical values. Linear Equation Solve equations of the form ax + b = c.

Geometry

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Area & Perimeter Calculate area and perimeter for 2D geometric shapes. P Pythagorean Theorem Solve for side A, B, or hypotenuse C. T Triangle Solver Solve triangles using SSS, SAS, or ASA inputs. C Circle Calculator Calculate arc length, sector area, and chord length. D Distance & Midpoint Find the distance between two points (x₁,y₁) and (x₂,y₂).

Number Theory

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Prime Number Check if a number is prime and find factors. Factorial Compute factorials for non-negative integers. GCD / HCF Find the Greatest Common Divisor using Euclidean algorithm. LCM Find the Least Common Multiple of numbers. Random Number Generate random numbers within a specified range. Number Base Convert between Binary, Octal, Decimal, and Hexadecimal.

Engineering Math

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C Complex Numbers Add, multiply, divide complex numbers in rectangular and polar form. V Vector Math Dot product, cross product, magnitude, and angle between vectors. Matrix Calculator Calculate determinant, transpose, addition, and multiplication. L Laplace Transform Reference table of common Laplace transform pairs.

Advanced

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Scientific Perform advanced trigonometry, logs, and complex expressions. Logarithm Calculate log, ln, and custom base logarithms. L Limit Calculator Evaluate one-sided and two-sided limits with step-by-step analysis. P Percentile Calculator Find percentiles from raw data or from Z-scores. D Differential Equation Solver Solve ordinary differential equations using numerical methods.

Utilities

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Unit Converter Convert Length, Weight, Temperature, and Volume. D Data Storage Convert between Bytes, KB, MB, GB, and TB. S Speed Converter Convert between mph, km/h, m/s, knots, and ft/s. F Fuel Efficiency Convert between MPG (US/UK), L/100km, and km/L. C Compound Interest Calculate savings growth over time with regular contributions. P Password Generator Generate secure, random passwords with customizable criteria.

Graphing

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F Function Transformations Explore transformations, quadratic analysis, and wave parameters.