Geometry

Math and statistics calculators with step-by-step formulas and worked examples for students and professionals.

Area Calculator

Calculate the area of a circle, triangle, rectangle, trapezoid, parallelogram, ellipse, regular polygon or sector instantly with formulas shown.

Calculate the volume and surface area of a sphere, cube, box, cylinder, cone, pyramid, hemisphere or frustum instantly with formulas shown.

Calculate the total and lateral surface area of a sphere, cube, box, cylinder or cone instantly with formulas shown and verified.

Solve any triangle from three sides, two sides and an included angle, or two right-triangle legs. Get area, perimeter and all angles instantly.

Find a right triangle's hypotenuse or missing leg using the Pythagorean theorem (a² + b² = c²). Includes area, perimeter and worked examples.

Find a circle's radius, diameter, circumference and area from any one known value. Free, instant, formulas shown.

Calculate arc length, chord length, sector area and segment area from a circle's radius and central angle. Free, instant, formulas shown.

Find the distance, midpoint and slope between two points (x1,y1) and (x2,y2) using the distance formula. Free, instant, worked examples.

Find the slope, angle of inclination and equation of the line through two points (x1,y1) and (x2,y2). Free, instant, worked examples.