Geometry Calculator: 2D & 3D

Geometry Calculator helps you calculate triangle and circle area, perimeter, volume and surface area for plane and solid figures. Enter the known values, choose what you need to find, and get the result with the formulas used in the calculation. The app covers area, perimeter, circumference, volume, surface area, sides, diagonals, radii, heights, angles, arcs, sectors and other shape parameters.

2D shapes include triangles, squares, rectangles, parallelograms, rhombuses, trapezoids, polygons, circles, rings and ellipses. 3D solids include cubes, cuboids, prisms, pyramids, cylinders, cones, frustums, spheres and polyhedra. For triangles, you can find area and perimeter, calculate sides and angles from available input options, and review the corresponding geometry formulas. For circles, work with area, radius, arc length, sector area and circular segments, or select annulus options for ring-shaped figures.

The area calculator supports square, rectangle, parallelogram, rhombus, trapezoid, ellipse and quadrilateral. The perimeter calculator finds boundary length, and diagonal calculations are available for squares, rectangles, parallelograms and rhombuses. Polygon calculations include area and angles. For solids, calculate cylinder, cone, sphere, cube, cuboid, prism and pyramid volume, along with surface area and lateral surface area where applicable. Additional options cover octahedron area and volume, and truncated pyramid volume.

Interactive drawings update when values change, making formulas and geometric relationships easier to understand. Use the app to check homework, revisit a formula or compare results after changing an input. It is useful for students, teachers, engineers, technicians, builders and anyone who works with geometry. Results depend on the values you enter, so check units and input data before using a calculation in practice.