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Calculate the perimeter of rectangles, squares, and other polygons
Calculate the area of rectangles, squares, circles, and triangles
Calculate the circumference of a circle using radius or diameter
Calculate the radius of a circle from diameter, circumference, or area
Calculate the area of a circle using radius, diameter, or circumference
Calculate the distance between two points using the distance formula with step-by-step solutions
Calculate the angle between two vectors in 2D or 3D space using the dot product formula
Calculate the direction (angle) of a vector in 2D or 3D space using atan2 or direction angles
Calculate the diagonal length of a rectangle using length and width with step-by-step solutions
Calculate area, perimeter, interior angles, exterior angles, apothem, and all properties of regular polygons
Calculate volume, surface area, lateral surface area, and diagonal of a rectangular prism (cuboid) with step-by-step solutions
Calculate the hypotenuse of a right triangle using the Pythagorean theorem with step-by-step solutions
Calculate all angles of a triangle using multiple methods: Law of Cosines, Law of Sines, coordinates, or area formula. Supports SSS, SAS, SSA, ASA, AAS cases, coordinate-based calculation, and area-based calculation with step-by-step solutions.
Convert linear equations from Ax + By = C to y = mx + b format
Calculate the midpoint between two points on a coordinate plane
Calculate the distance between two points using the distance formula
Find vertex, focus, directrix, and other properties of a parabola from its equation
Convert quadratic equations from standard form (ax� + bx + c) to vertex form (a(x-h)� + k). Includes standard form to vertex form conversion with step-by-step completing the square method.
Calculate the slope of a line between two points or from coordinates
Calculate slope percentage from rise/run, two points, or slope value. Convert slope to percentage grade for construction, engineering, and surveying applications with step-by-step solutions.
Calculate the surface area of a triangular prism from its dimensions
Calculate volume for rectangular prisms and triangular pyramids
Find missing sides of similar triangles using proportions and scale factors
Calculate triangle area using Heron's formula when you know all three side lengths
Find two numbers that add to a given sum and multiply to a given product
Solve proportions using cross multiplication to find missing values in ratios
Calculate exponential functions, growth, decay, and compound interest with our free exponential function calculator. Get instant results for exponential equations, exponential growth and decay, and financial calculations.
Convert between scientific notation and standard form, expand and simplify numbers
Convert numbers to scientific notation and perform arithmetic operations. Free online scientific notation calculator with support for converting to/from decimal form and calculating with scientific notation equations.
Round decimal numbers to the nearest cent (2 decimal places) for currency calculations
Round numbers to the nearest thousand with different rounding methods. Calculate rounded values for population, sales, statistics, and large numbers.
Calculate the modular multiplicative inverse of a number modulo n using the extended Euclidean algorithm
Solve inverse variation problems of the form y = k / x. Solve for y, k, or x given two values.
Calculate the volume of a triangular pyramid (tetrahedron) from base area and height or side lengths
Calculate the average rate of change of a function between two points using the slope formula
Calculate the quotient and remainder when dividing two numbers with step-by-step results
Calculate the remainder when dividing two numbers using modulo operation
Solve systems of simultaneous congruences using the Chinese Remainder Theorem algorithm
Calculate the volume of a hemisphere using the radius with step-by-step calculations
Calculate the volume of a sphere using radius or diameter with step-by-step solutions
Calculate linear regression using least squares method. Find best-fit line, correlation coefficient, and make predictions
Calculate binomial coefficients C(n,k) for combinations. Find the number of ways to choose k items from n items
Calculate the square of a binomial expression using the formula (a+b)� = a� + 2ab + b�. Free online algebra calculator with step-by-step solutions and detailed explanations.
Compare two numbers to determine which is greater, less than, or equal to the other
Calculate the sum of arithmetic, geometric, and custom series with step-by-step solutions
Solve proportions, check if ratios are proportional, or calculate scale factors with step-by-step solutions
Calculate the area of a semicircle using radius, diameter, or circumference with step-by-step solutions
Find the greatest common factor of two or more numbers using the Euclidean algorithm with step-by-step solutions
Calculate sides, area, and perimeter of a 45 45 90 triangle (isosceles right triangle) with step-by-step solutions. Free online 45-45-90 triangle calculator for finding missing sides, area, and perimeter.
Calculate sides, area, and perimeter for 45-45-90 and 30-60-90 special right triangles. Find missing sides using special right triangle ratios with step-by-step solutions for both triangle types.
Calculate the nth term and sum of a geometric sequence with step-by-step solutions and sequence visualization
Calculate the nth term and sum of an arithmetic sequence. Find any term using the common difference with step-by-step solutions and sequence visualization.
Convert between point-slope form, slope-intercept form, and standard form of linear equations with step-by-step solutions
Find the equation of a circle from center and radius, or from three points on the circle with step-by-step solutions
Calculate the length of any side of a right triangle using the Pythagorean theorem with step-by-step solutions
Calculate the length of an arc using radius and central angle with step-by-step solutions
Calculate percentages, percentage changes, and percentage relationships with step-by-step solutions
Calculate arithmetic, geometric, harmonic, and weighted averages with step-by-step solutions
Convert between decimals, percentages, and fractions with step-by-step solutions
Calculate all six trigonometric functions (sin, cos, tan, csc, sec, cot) for any angle in degrees or radians
Calculate missing sides and angles in right triangles using Pythagorean theorem and trigonometry
Calculate all properties of an isosceles triangle including sides, angles, area, perimeter, and height with step-by-step solutions
Calculate surface area for cube, rectangular prism, cylinder, sphere, cone, and triangular prism with step-by-step solutions
Calculate the height of any triangle using multiple methods: from base and area, three sides (Heron's formula), or trigonometry with step-by-step solutions
Calculate significant figures, round numbers, and perform arithmetic operations while maintaining proper precision
Calculate how long it takes for a quantity to double at a given growth rate using Rule of 70 or natural logarithm
Calculate natural logarithm (ln), common logarithm (log10), or logarithm with any custom base with step-by-step solutions
Calculate the golden ratio (f), multiply or divide by f, or find golden rectangle dimensions with step-by-step solutions
Calculate area, perimeter, side length, apothem, and diagonal of a regular hexagon with step-by-step solutions
Calculate area, perimeter, side length, apothem, and diagonal of a regular octagon with step-by-step solutions
Work with slope-intercept form (y = mx + b) equations. Find slope, y-intercept, convert to other forms, and graph information with step-by-step solutions
Calculate area, perimeter, height, and side length of an equilateral triangle with step-by-step solutions. All sides equal, all angles 60?
multiply two or more numbers instantly with our free online multiplication calculator. Get accurate results with step-by-step calculations.
Calculate the hyperbolic sine (sinh) of any number instantly. Free online sinh calculator with step-by-step calculations and explanations.
Calculate the error function (erf) and complementary error function (erfc) of any number with high precision
Calculate the error bound for Taylor polynomial approximations using Lagrange remainder formula
Calculate the percent error between measured and true values. Find accuracy of measurements and experimental results
Calculate the percentage difference between two values when comparing experimental results. Find relative difference between measurements
Calculate the volume of a cylinder instantly using radius and height. Free online cylinder volume calculator with step-by-step calculations and formulas.
Calculate the arithmetic mean (average) of a set of numbers instantly. Free online mean calculator with step-by-step calculations and explanations.
Calculate what percentage one time period is of another. Free online time percentage calculator with support for hours, minutes, and seconds.
Add, subtract, multiply, divide, and simplify fractions instantly. Free online fraction calculator with step-by-step calculations and decimal conversions.
Reduce fractions to their lowest terms instantly. Free online simplify fractions calculator with step-by-step calculations, GCD finder, and decimal conversions. Perfect for learning how to simplify 4/8 and other fractions.
Find the least common denominator (LCD) for two or more fractions. Calculate common denominators and convert fractions to equivalent fractions with step-by-step solutions.
Convert between decimal and two's complement binary representation. Calculate two's complement for signed integers with step-by-step solutions for 8-bit, 16-bit, and 32-bit formats.