Free Online Math Tools
& Calculators
Fast, accurate, and easy-to-use math calculators for students, teachers, and professionals. From basic arithmetic to advanced calculus — all in your browser.
All Math Tools by Category
Browse our growing collection of free online calculators and converters.
Basic Arithmetic
Fundamental math operations including addition, subtraction, multiplication, and division.
Basic Calculator
Perform addition, subtraction, multiplication, and division with an easy-to-use online calculator.
Exponent Calculator
Calculate powers and exponents. Compute any base raised to any exponent instantly.
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic in scientific notation.
Modulo Calculator
Calculate the remainder of a division (modulo operation) for any two numbers.
Percentages
Calculate percentages, percentage changes, and related operations.
Percentage Calculator
Calculate percentages easily. Find what percent one number is of another, increase or decrease by a …
Percentage Change Calculator
Calculate the percentage increase or decrease between two values quickly and accurately.
Markup Calculator
Calculate markup percentage, selling price, and profit margin from cost and revenue.
Averages & Ratios
Compute means, medians, modes, ratios, and proportions.
Average Calculator
Calculate the mean, median, and mode of a set of numbers.
Weighted Average Calculator
Calculate the weighted average of values with different weights.
Ratio Calculator
Simplify ratios, find equivalent ratios, and solve ratio problems.
Proportion Solver
Solve proportions by finding the unknown value in a/b = c/d equations.
Fractions & Decimals
Convert and calculate with fractions, decimals, and mixed numbers.
Unit Conversions
Convert between units of length, weight, temperature, and more.
Algebra
Solve equations, simplify expressions, and work with variables.
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0) and find both real and complex roots.
Cubic Equation Solver
Solve cubic equations (ax³ + bx² + cx + d = 0) and find all three roots.
Polynomial Evaluator
Evaluate any polynomial at a given value of x using Horner method.
Logarithm Calculator
Calculate logarithms with any base. Supports natural log (ln), log base 10, and custom bases.
Absolute Value Equation Solver
Solve absolute value equations |ax + b| = c with step-by-step solutions.
Linear Equation Solver
Solve linear equations in one variable (ax + b = c) with step-by-step solutions.
Systems of Equations Solver (2×2)
Solve systems of two linear equations with two unknowns using Cramer's rule.
Inequality Solver
Solve linear and quadratic inequalities with step-by-step solutions.
Summation Calculator (Σ)
Evaluate summation expressions with custom formulas, bounds, and step values.
Complex Number Calculator
Add, subtract, multiply, divide complex numbers and convert to polar form.
Geometry
Calculate areas, volumes, perimeters, and properties of shapes.
Area Calculator
Calculate the area of rectangles, circles, triangles, and other common shapes.
Volume Calculator
Calculate the volume of cubes, spheres, cylinders, cones, and other 3D shapes.
Perimeter Calculator
Calculate the perimeter and circumference of common 2D shapes.
Pythagorean Theorem Calculator
Find the missing side of a right triangle using a² + b² = c².
Distance Between Points Calculator
Calculate the distance between two points in 2D or 3D space.
Midpoint Calculator
Find the midpoint between two points in 2D or 3D coordinate space.
Slope Calculator
Calculate the slope of a line between two points and find the line equation.
Circle Calculator
Calculate radius, diameter, circumference, and area of a circle from any known value.
Surface Area Calculator
Calculate surface area of cubes, spheres, cylinders, cones, and other 3D shapes.
Triangle Solver
Solve any triangle given SSS, SAS, ASA, or AAS using law of sines and cosines.
Coordinate Geometry Calculator
Calculate distance, midpoint, slope, equation of line, and area using coordinates.
Trigonometry
Work with sine, cosine, tangent, and related functions.
Trigonometry Calculator
Calculate sine, cosine, tangent, and their inverses for any angle.
Inverse Trigonometry Calculator
Calculate arcsin, arccos, arctan and get angles from trig ratios.
Right Triangle Solver
Solve any right triangle given two sides or one side and one angle.
Radians ↔ Degrees Converter
Convert angles between radians and degrees instantly.
Calculus
Derivatives, integrals, limits, and differential equations.
Derivative Calculator
Compute numerical derivatives of polynomial, trig, exponential, and log functions at any point.
Second Derivative Calculator
Compute the second derivative and determine concavity at a given point.
Numerical Integration Calculator
Compute definite integrals numerically using Simpson's rule and the trapezoidal rule.
Limit Calculator
Evaluate limits of functions numerically as x approaches a value from left, right, or both sides.
Riemann Sum Calculator
Approximate definite integrals using left, right, midpoint, and trapezoidal Riemann sums.
Tangent Line Calculator
Find the equation of the tangent line to a function at a given point.
Newton's Method Calculator
Find roots of equations using Newton's iterative method with step-by-step convergence.
Arc Length Calculator
Calculate the arc length of a curve using numerical integration.
Partial Derivative Calculator
Compute partial derivatives of multivariable polynomial functions.
Taylor Series Calculator
Compute Taylor/Maclaurin series expansions for common functions.
Differential Equation Solver
Solve first-order ODEs numerically using Euler method and RK4.
Area Between Curves Calculator
Calculate the area enclosed between two functions over an interval.
Volume of Revolution Calculator
Calculate volumes of solids of revolution using disc and shell methods.
Laplace Transform Calculator
Find Laplace transforms and inverse transforms for common functions.
Fourier Series Calculator
Compute Fourier coefficients for periodic functions.
Improper Integral Calculator
Evaluate improper integrals with infinite limits or discontinuities.
Series Convergence Calculator
Test if an infinite series converges or diverges using ratio, root, and comparison tests.
Statistics & Probability
Statistical analysis, probability calculations, and data tools.
Standard Deviation Calculator
Calculate standard deviation, variance, and other statistics for a dataset.
Z-Score Calculator
Calculate the z-score and find probabilities from the standard normal distribution.
Probability Calculator
Calculate single event, multiple event, conditional, and complementary probabilities.
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient (r) between two datasets.
Linear Regression Calculator
Find the best-fit line (y = mx + b) using least squares regression.
Binomial Distribution Calculator
Calculate binomial probabilities, mean, variance, and cumulative distributions.
Poisson Distribution Calculator
Calculate Poisson probabilities for rare event modeling.
Chi-Square Calculator
Perform chi-square goodness-of-fit and independence tests.
Confidence Interval Calculator
Calculate confidence intervals for means and proportions.
Sample Size Calculator
Calculate the required sample size for surveys and experiments.
Percentile Calculator
Find percentile ranks and values from a dataset.
ANOVA Calculator
Perform one-way analysis of variance to compare group means.
Bayes' Theorem Calculator
Calculate conditional probabilities using Bayes' theorem.
Financial Math
Interest rates, loan payments, investment returns, and more.
Compound Interest Calculator
Calculate compound interest on savings and investments over time.
Simple Interest Calculator
Calculate simple interest using I = P × R × T formula.
Loan Payment Calculator
Calculate monthly loan payments, total interest, and amortization.
Tip Calculator
Calculate tip amount, total bill, and split between multiple people.
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and amortization schedule.
ROI Calculator
Calculate return on investment percentage from cost and revenue.
Currency Converter
Convert between major world currencies with customizable exchange rates.
Depreciation Calculator
Calculate straight-line and declining balance depreciation of assets.
Number Theory
Prime numbers, factors, GCD, LCM, and other number properties.
GCD & LCM Calculator
Find the GCD and LCM of two or more numbers.
Prime Factorization Calculator
Find the prime factorization of any positive integer and check primality.
Factorial Calculator
Calculate the factorial (n!) of any non-negative integer.
Fibonacci Calculator
Generate Fibonacci numbers, find the nth term, and check if a number is Fibonacci.
Physics
Kinematics, forces, energy, waves, electricity, and thermodynamics calculators.
Velocity Calculator
Calculate velocity, distance, or time using v = d/t.
Acceleration Calculator
Calculate acceleration, velocities, or time using kinematic equations.
Force Calculator (F = ma)
Calculate force, mass, or acceleration using Newton's second law.
Projectile Motion Calculator
Calculate range, max height, time of flight, and trajectory.
Work & Energy Calculator
Calculate work done, kinetic energy, potential energy, and power.
Momentum Calculator
Calculate momentum, impulse, and solve collision problems.
Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's law.
Wave Calculator
Calculate wavelength, frequency, period, and wave speed.
Gravitational Force Calculator
Calculate gravitational force between two masses using Newton's law.
Ideal Gas Law Calculator
Solve PV = nRT for any unknown variable.
Friction Force Calculator
Calculate static and kinetic friction forces from normal force and coefficients.
Pendulum Calculator
Calculate the period, frequency, and length of a simple pendulum.
Spring Constant Calculator
Calculate spring constant, force, or displacement using Hooke's law (F = kx).
Coulomb's Law Calculator
Calculate electrostatic force between two charges.
Capacitance Calculator
Calculate capacitance, charge, voltage, and energy stored in capacitors.
Thermal Expansion Calculator
Calculate linear and volumetric thermal expansion of materials.
Pressure Calculator
Calculate pressure from force and area, convert pressure units, and compute fluid pressure.
Density Calculator
Calculate density, mass, or volume using ρ = m/V.
Decibel Calculator
Convert between decibels, power ratios, and amplitude ratios.
Doppler Effect Calculator
Calculate observed frequency shifts due to relative motion of source and observer.
Centripetal Force Calculator
Calculate centripetal force, velocity, radius, and period for circular motion.
Torque Calculator
Calculate torque from force, distance, and angle of application.
Kinetic Energy Calculator
Calculate translational and rotational kinetic energy.
Potential Energy Calculator
Calculate gravitational potential energy (mgh) and elastic potential energy (½kx²).
Snell's Law Calculator
Calculate refraction angles and critical angles for light passing between media.
Lens Equation Calculator
Calculate focal length, object distance, image distance, and magnification for thin lenses.
Half-Life Calculator
Calculate radioactive decay, remaining quantity, and elapsed time from half-life.
Escape Velocity Calculator
Calculate the escape velocity from any celestial body given mass and radius.
Buoyancy Calculator
Calculate buoyant force using Archimedes principle (F = ρVg).
Heat Transfer Calculator
Calculate heat energy using Q = mcΔT for specific heat and phase changes.
Linear Algebra
Matrices, determinants, vectors, eigenvalues, and systems of equations.
Matrix Determinant Calculator
Calculate the determinant of 2×2 and 3×3 matrices.
Matrix Multiplication Calculator
Multiply two matrices together with step-by-step dot products.
Vector Calculator
Add, subtract, find dot product, cross product, and magnitude of vectors.
Matrix Inverse Calculator
Calculate the inverse of a 2×2 or 3×3 matrix with step-by-step elimination.
Eigenvalue Calculator
Calculate eigenvalues and eigenvectors for 2×2 matrices.
Matrix Transpose Calculator
Transpose matrices of any size by swapping rows and columns.
Discrete Math
Permutations, combinations, factorials, and set operations.
Advanced Equations
Systems of equations, matrices, and complex number operations.
More tools coming soon in this category!
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