Free Online Calculators » Area Calculator

Area expresses the extent of a two-dimensional shape, in the plane. Circle, ellipse, parallelogram, rectangle, rhombus, sector, square, trapezoid, triangle. Surface area expresses the extent of a two-dimensional surface of a three-dimensional object. Cone, cube, cuboid, cylinder, sphere, tetrahedron.


$$A= \pi \times r^{2}$$