Free Math Calculators – Page 3

100+ free calculators and solvers with step-by-step working and graphs. Every answer is checked. Free to use. No sign-up needed.

Algebra

(h,k) Vertex Form CalculatorConvert y = ax² + bx + c to vertex form a(x − h)² + k by completing the square. Graph eˣ Exponential Growth & Decay CalculatorCalculate exponential growth or decay from a starting amount, a percentage rate and time. Graph ()() Polynomial Factoring CalculatorFactor polynomials completely: common factors, the rational root theorem, quadratics and differences of squares. Graph (a+b) Expand Brackets CalculatorExpand and simplify brackets like (2x + 3)(x − 4) or (x + 1)³, collect like terms, and check the answer at sample values. =? Equation SolverSolve equations in x such as x³ − 2x = 4, 2^x = x + 3 or cos x = x/2. Graph |x| Absolute Value Equation SolverSolve absolute value equations |ax + b| = c by splitting into two cases, with no-solution cases explained and a V-shaped graph. Graph

Geometry & Coordinate Geometry

a²+b² Pythagorean Theorem CalculatorFind the hypotenuse or a missing side of a right triangle using a² + b² = c². A Area CalculatorFind the area of a rectangle, square, triangle, circle, trapezoid or parallelogram. m Slope CalculatorFind the slope (gradient) of a line through two points, plus its equation y = mx + c, angle and perpendicular slope. Graph d Distance Between Two Points CalculatorFind the distance between two points on a graph using the distance formula. Graph M Midpoint CalculatorFind the midpoint between two points by averaging the coordinates. Graph △ Triangle CalculatorSolve any triangle from three known parts: sides, angles, area, perimeter and type, using the laws of sines and cosines. Graph ○ Circle CalculatorEnter the radius, diameter, circumference or area of a circle and get the other three, with exact answers in terms of π and a diagram. Graph V Volume CalculatorFind the volume of a cube, cuboid, cylinder, cone, sphere, hemisphere or square pyramid. SA Surface Area CalculatorFind the total surface area of a cube, cuboid, cylinder, cone, sphere, hemisphere or square pyramid, broken down face by face with a chart. Graph P Perimeter CalculatorFind the perimeter of a rectangle, square, triangle, regular polygon, semicircle or the circumference of a circle, with exact answers in π. ⌒ Arc Length & Sector Area CalculatorFind the arc length, sector area and chord length from a radius and an angle in degrees or radians, with exact answers in π. Graph n-gon Regular Polygon CalculatorFind the interior and exterior angles, area, perimeter, apothem and diagonals of any regular polygon from the number of sides and side length. Graph (x,y) Equation of a Circle CalculatorWrite the equation of a circle from its centre and radius, or find the centre and radius from the general form by completing the square. Graph y=mx Point-Slope Form CalculatorFind the equation of a line from one point and its slope, in point-slope, slope-intercept and standard form, with a graph. Graph