Geometry

24 free online calculators — instant results, no sign-up

Circle CalculatorArea, circumference, diameter and arc length Triangle CalculatorArea, perimeter, angles and height Rectangle CalculatorArea, perimeter and diagonal Sphere CalculatorVolume, surface area and diameter Trapezoid CalculatorArea, perimeter and median NEWCone CalculatorVolume, lateral area and slant height NEWCylinder CalculatorVolume, lateral and total surface area NEWEllipse CalculatorArea and circumference approximation NEWParallelogram CalculatorArea, perimeter and height Regular Polygon CalculatorArea, perimeter, angles, circumradius and inradius Pythagorean Theorem CalculatorFind the third side of a right triangle Sector CalculatorArc length, area, chord and segment from radius and angle Cuboid CalculatorVolume, surface area, space diagonal and edge sum Pyramid CalculatorSquare pyramid volume, lateral area and slant height Frustum Volume CalculatorTruncated cone volume, slant height and surface area Ellipsoid Volume CalculatorEllipsoid volume and Knud Thomsen surface area Annulus CalculatorRing area π(R²−r²), width and circumferences Circular Segment CalculatorArea, arc length, chord from any two values Tube & Pipe CalculatorHollow cylinder weight, volume, surface area Polygon Area CalculatorShoelace formula from vertex coordinates, centroid Torus CalculatorV=2π²Rr², surface area Spherical Cap CalculatorVolume, cap area, dome heads Rhombus & Kite CalculatorDiagonal area, sides & angles Golden Ratio Calculator0.618 split, golden rectangle, Fibonacci