Math Calculators

113 free math calculators for percentages, fractions, algebra, geometry, trigonometry, linear algebra, and coordinate geometry. No signup required.

113 free tools

30-60-90 Triangle Calculator

Calculate all sides, area, and perimeter of a 30-60-90 special right triangle. Enter any one side and get the rest instantly. Free online calculator.

45-45-90 Triangle Calculator

Calculate the sides, area, and perimeter of a 45-45-90 isosceles right triangle. Enter a leg or hypotenuse and get all properties instantly.

3D Distance Calculator

Calculate the distance between two points in 3D space. Enter coordinates for both points and get the Euclidean distance instantly.

Absolute Value Calculator

Calculate the absolute value of any number instantly. Free, no signup required.

Absolute Value Equation Solver

Solve absolute value equations of the form |ax + b| = c. Find both solutions instantly. Free online absolute value equation solver.

Arc Length Calculator

Calculate the arc length of a circle from the radius and central angle. Supports degrees and radians. Shows the formula and angle conversions. Free ca

Area Calculator

Calculate the area of rectangles, triangles, circles, and trapezoids. Enter dimensions and get instant results with formulas. Free online area calcula

Binary Converter

Convert between binary, decimal, hexadecimal, and octal instantly. Free, no signup required.

Circle Calculator

Calculate all circle properties from any one known value. Enter radius, diameter, area, or circumference to find the rest. Free online circle calculat

Circumference Calculator

Calculate the circumference of a circle from the radius or diameter. Shows the formula used and all related circle measurements. Free online calculato

Comparing Fractions Calculator

Compare two fractions instantly. See which is larger, the decimal equivalents, the difference, and the cross multiplication proof. Free, no signup req

Coterminal Angle Calculator

Enter any angle and find positive and negative coterminal angles. Also shows the coterminal angle within 0-360 degrees. Free online calculator.

Cube Root Calculator

Calculate the cube root of any number instantly. Handles negative numbers. Free, no signup required.

Completing the Square Calculator

Convert a quadratic equation ax^2 + bx + c into vertex form a(x - h)^2 + k. Find the vertex instantly. Free completing the square calculator.

Cylinder Volume Calculator

Calculate the volume, surface area, lateral area, and base area of a cylinder. Enter radius and height for instant results with formulas. Free calcula

Cone Calculator

Calculate the volume, surface area, lateral area, and slant height of a cone from its radius and height. Free online cone calculator.

Decimal to Fraction Converter

Convert any decimal to a fraction instantly. Handles repeating decimals, simplifies to lowest terms, and shows the original value. Free, no signup req

Distance Formula Calculator

Calculate the distance between two coordinate points instantly using the distance formula. Free, no signup required.

Double Angle Calculator

Calculate double angle trig values: sin(2x), cos(2x), and tan(2x) for any angle in degrees or radians. Shows formulas used. Free online calculator.

Cramer's Rule Calculator

Solve a 2x2 system of linear equations using Cramer's Rule. Enter coefficients and get the solution with determinant details.

Ellipse Calculator

Calculate the area, approximate circumference, and eccentricity of an ellipse from its semi-major and semi-minor axes. Free online ellipse calculator.

Cross Product Calculator

Calculate the cross product of two 3D vectors. Get the resulting vector and its magnitude instantly.

Equivalent Fractions Calculator

Generate a list of equivalent fractions for any fraction. Find the simplest form and see all multiples. Free, no signup required.

Exponent Calculator

Calculate any number raised to any power instantly. Supports negative and fractional exponents. Free, no signup required.

Cube Calculator

Calculate the volume, surface area, space diagonal, and face diagonal of a cube. Enter the side length and get results instantly.

Factorial Calculator

Calculate n! (n factorial) for any number from 0 to 170. See the full multiplication steps and result. Free, no signup required.

Cubic Equation Solver

Solve cubic equations of the form ax^3 + bx^2 + cx + d = 0. Find all real roots instantly with step-by-step breakdown.

Prime Factorization Calculator

Find the prime factorization of any integer instantly. Shows all prime factors with exponents. Free, no signup required.

Fraction to Decimal Converter

Convert any fraction to its decimal equivalent instantly. Detects repeating decimals and lets you choose decimal places. Free, no signup required.

Fraction Calculator

Add, subtract, multiply, or divide fractions instantly. Get simplified results, decimal equivalents, and mixed number forms. Free, no signup required.

Direct & Inverse Variation Calculator

Calculate the constant of variation and predict values for direct and inverse variation relationships. Enter a known pair and solve.

GCF Calculator

Find the greatest common factor (GCF) of 2-4 numbers instantly. Shows step-by-step Euclidean algorithm calculations. Free, no signup required.

Discriminant Calculator

Calculate the discriminant of a quadratic equation and determine the nature of its roots. Find b^2 - 4ac instantly.

Golden Ratio Calculator

Calculate golden ratio pairs for any number. Enter a value to find the larger and smaller golden ratio counterparts using phi (1.618...). Free, no sig

Heron's Formula Calculator

Calculate the area of any triangle using Heron's formula from three side lengths. Get the area, perimeter, and semi-perimeter instantly. Free, no sign

Distance Between Two Points Calculator

Calculate the distance between two points on a coordinate plane. Enter (x1, y1) and (x2, y2) and get the result instantly.

Hex Calculator

Convert hex to decimal and perform hex arithmetic (add, subtract, multiply, divide). Free, no signup required.

Dot Product Calculator

Calculate the dot product of two vectors, along with magnitudes and the angle between them. Supports any dimension.

Hexagon Calculator

Calculate the area, perimeter, apothem, and diagonals of a regular hexagon from side length. Free online hexagon calculator.

Hypotenuse Calculator

Enter two legs of a right triangle and calculate the hypotenuse using the Pythagorean theorem. Also shows angles, area, and perimeter. Free calculator

Eigenvalue Calculator (2x2)

Calculate the eigenvalues of a 2x2 matrix. Get the trace, determinant, discriminant, and both eigenvalues instantly.

Inverse Trig Calculator

Calculate arcsin, arccos, and arctan for any value. Get results in both degrees and radians. Free online inverse trigonometry calculator.

Law of Cosines Calculator

Solve for any side or angle using the law of cosines formula c²=a²+b²-2ab·cos(C). Enter 3 values, get the 4th. Free online calculator.

Ellipsoid Volume Calculator

Calculate the volume of an ellipsoid from its three semi-axis lengths. Uses the formula V = (4/3) * pi * a * b * c.

Law of Sines Calculator

Solve triangles using the law of sines a/sin(A) = b/sin(B). Enter a known side-angle pair and one more value. Free online calculator.

Endpoint Calculator

Find the missing endpoint of a line segment given the midpoint and the other endpoint. Instant results with the endpoint formula.

LCD Calculator

Find the least common denominator (LCD) of 2-4 fractions instantly. Shows conversion multipliers and step-by-step LCM calculations. Free, no signup re

Equation of a Line Calculator

Find the equation of a line through two points. Get the slope, y-intercept, and equation in slope-intercept form instantly.

LCM Calculator

Find the least common multiple (LCM) of 2-4 numbers instantly. Shows step-by-step calculations. Free, no signup required.

Isosceles Triangle Calculator

Calculate the area, height, perimeter, and angles of an isosceles triangle from the base and equal side length. Free online calculator.

Equilateral Triangle Calculator

Calculate the area, height, perimeter, inradius, and circumradius of an equilateral triangle from its side length.

Linear Interpolation Calculator

Estimate a value between two known data points using linear interpolation. Detects extrapolation. Free, no signup required.

Logarithm Calculator

Calculate logarithms with any base instantly. Supports log base 2, base 10, natural log, and custom bases. Free, no signup required.

Matrix Calculator

Perform matrix addition, subtraction, and multiplication for 2x2 or 3x3 matrices. Free, no signup required.

Matrix Determinant Calculator

Calculate the determinant of a 2x2 or 3x3 matrix instantly with step-by-step breakdown. Free, no signup required.

Factoring Trinomials Calculator

Factor trinomials of the form ax^2 + bx + c into two binomials. Find the roots and factored form instantly.

Midpoint Calculator

Calculate the midpoint between two coordinate points instantly. Also shows the distance between them. Free, no signup required.

Mixed Number Calculator

Add, subtract, multiply, or divide mixed numbers instantly. Get results as mixed numbers, improper fractions, and decimals. Free, no signup required.

FOIL Calculator

Multiply two binomials using the FOIL method. See the First, Outer, Inner, Last terms and the expanded polynomial.

Modulo Calculator

Calculate the remainder of division (modulo) instantly. Shows quotient and full breakdown. Free, no signup required.

LU Decomposition Calculator

Decompose a square matrix into lower (L) and upper (U) triangular matrices. Enter rows separated by semicolons. Free LU decomposition calculator.

Percent Error Calculator

Calculate percent error between experimental and theoretical values instantly. Uses the standard formula |experimental - theoretical| / |theoretical|

Percentage Change Calculator

Calculate the percentage change between two values instantly. Find percent increase or decrease with the formula, difference, and direction. Free, no

Gauss-Jordan Elimination Calculator

Reduce any matrix to reduced row echelon form (RREF) using Gauss-Jordan elimination. Enter a matrix and get the result instantly.

Percentage Difference Calculator

Calculate the percentage difference between two values instantly. Uses the formula |A - B| / ((A + B) / 2) x 100. Free, no signup required.

Matrix Inverse Calculator

Find the inverse of a 2x2 matrix instantly. See the determinant and the inverse matrix. Free online matrix inverse calculator.

Percentage Increase/Decrease Calculator

Calculate the result of increasing or decreasing a number by a percentage. Enter a value and percentage to get the new amount instantly. Free, no sign

Matrix Multiplication Calculator

Multiply two 2x2 matrices together instantly. Enter the elements of matrices A and B to get the product C = A * B. Free online calculator.

Percentage Calculator

Calculate percentages instantly. Find what percent X is of Y, what is X% of Y, or X is Y% of what. Free, no signup required.

Hemisphere Calculator

Calculate the volume, total surface area, curved surface area, and base area of a hemisphere from its radius.

Perimeter Calculator

Calculate the perimeter of rectangles, triangles, circles, and regular polygons. Enter dimensions and get instant results with formulas. Free calculat

Prime Number Checker

Check if any number is prime instantly. Shows all factors for non-prime numbers. Free, no signup required.

Prime Factorization Calculator

Find the prime factorization of any positive integer instantly. See all prime factors, their counts, and the exponential expression. Free, no signup r

Parallelogram Calculator

Free online Parallelogram Calculator.

Proportion Calculator

Solve proportions instantly. Enter three values in a/b = c/d and find the missing fourth value. Shows the formula used. Free, no signup required.

Partial Fractions Calculator

Decompose a rational expression into partial fractions. Enter the numerator coefficients and denominator roots. Free partial fraction decomposition ca

Pythagorean Theorem Calculator

Solve for any missing side of a right triangle using the Pythagorean theorem. Enter two known sides (a, b, or c) and calculate the third. Free calcula

Quadratic Formula Calculator

Solve any quadratic equation instantly. Shows roots (real or complex), discriminant, and vertex. Free, no signup required.

Ratio Simplifier

Simplify any ratio to its lowest terms instantly. Enter two numbers and get the simplified ratio, GCD, and decimal equivalent. Free, no signup require

Reference Angle Calculator

Enter any angle in degrees or radians. Find the reference angle (0-90), the quadrant, and the normalized angle. Free online calculator.

Right Triangle Solver

Enter any 2 known values of a right triangle (sides or angles) and calculate all remaining values. The most comprehensive right triangle calculator. F

Right Triangle Calculator

Solve any right triangle by entering two known values. Finds all sides, angles, area, and perimeter. Accepts sides and angles as inputs. Free calculat

Scientific Notation Converter

Convert numbers to and from scientific notation instantly. Enter a number to get its scientific form, or enter a coefficient and exponent to get the s

Polynomial Division Calculator

Divide polynomials and find the quotient and remainder. Enter coefficients for the dividend and divisor. Free online polynomial long division calculat

Sector Area Calculator

Calculate the area of a circular sector from the radius and central angle. Supports degrees and radians. Shows formula and arc length. Free online cal

Significant Figures Calculator

Count the significant figures in any number and round to a specified number of sig figs. See which rules apply. Free, no signup required.

Simplify Fraction Calculator

Reduce any fraction to its simplest form instantly. See the GCD, decimal equivalent, and step-by-step simplification. Free, no signup required.

Sin Cos Tan Calculator

Calculate sin, cos, tan, csc, sec, and cot for any angle in degrees or radians. All 6 trigonometric functions with instant results. Free online calcul

Pyramid Volume Calculator

Calculate the volume, surface area, base area, and lateral area of a pyramid from base dimensions and height. Free online pyramid calculator.

Slope-Intercept Calculator

Find the equation of a line in slope-intercept form (y = mx + b) from two points or a point and slope. Free, no signup required.

Slope Calculator

Calculate the slope, rise, run, and angle between two points instantly. Free, no signup required.

Sphere Calculator

Calculate the volume, surface area, and diameter of a sphere from its radius. Shows all properties with formulas. Free online sphere calculator.

Midpoint Coordinate Calculator

Calculate the midpoint between two coordinate points. Enter (x1, y1) and (x2, y2) to find the exact center point instantly.

Square Root Calculator

Calculate the square root of any number instantly, including negative numbers (imaginary results). Free, no signup required.

Rectangular Prism Calculator

Calculate the volume, surface area, and space diagonal of a rectangular prism (box) from length, width, and height. Free online calculator.

Surface Area Calculator

Calculate the surface area of 3D shapes: sphere, cylinder, cone, and cube. Shows total and lateral surface area with formulas. Free online calculator.

System of Equations Solver

Solve a system of two linear equations with two unknowns instantly using Cramer's rule. Free, no signup required.

Regular Polygon Calculator

Calculate the area, perimeter, apothem, circumradius, and angles of any regular polygon from the number of sides and side length. Free online calculat

Trapezoid Calculator

Calculate the area and perimeter of a trapezoid. Enter parallel sides, height, and optional leg lengths. Shows the formula used. Free online calculato

Rhombus Calculator

Calculate the area, side length, perimeter, and angles of a rhombus from its two diagonals. Free online rhombus calculator.

Parabola Calculator

Analyze a parabola from its equation y = ax^2 + bx + c. Find the vertex, focus, directrix, and axis of symmetry instantly.

Triangle Area Calculator

Calculate triangle area using base and height, Heron's formula (three sides), or the SAS method (two sides and included angle). Free online calculator

Triangle Solver Calculator

Enter any 3 known values of a triangle (sides and angles) and solve for the remaining values. Uses law of sines and cosines. Free online triangle calc

Unit Circle Calculator

Enter any angle in degrees or radians. Get sin, cos, tan values and (x,y) coordinates on the unit circle. Includes standard angle reference table. Fre

Row Echelon Form Calculator

Reduce a matrix to row echelon form (REF) using Gaussian elimination. Enter rows separated by semicolons. Free online REF calculator.

Volume Calculator

Calculate the volume of 3D shapes: sphere, cylinder, cone, cube, and rectangular prism. Enter dimensions and get instant results with formulas. Free c

Slant Height Calculator

Calculate the slant height of a cone or pyramid from the height and radius or base side. Free online slant height calculator.

Point-Slope Form Calculator

Write the equation of a line in point-slope form given a point and slope. Get both point-slope and slope-intercept forms.

Polar Coordinates Converter

Convert between Cartesian (x, y) and polar (r, theta) coordinates. Switch modes and get instant results.

Torus Calculator

Calculate the volume and surface area of a torus from the major and minor radii. Free online torus calculator.

Triangular Prism Calculator

Calculate the volume, surface area, and base area of a triangular prism from the triangle base, triangle height, and prism length. Free online calcula

Vector Magnitude Calculator

Calculate the magnitude (length) and unit vector of any vector from its components. Works for 2D, 3D, and n-dimensional vectors. Free online calculato

Y-Intercept Calculator

Find the y-intercept of a line given the slope and a point. Get the value of b in y = mx + b instantly.