Surface Area Calculator
Calculate surface areas of 3D shapes including spheres, cubes, cylinders, cones, and pyramids with detailed step-by-step solutions.
Surface Area Calculation
Select a 3D shape and enter dimensions
Sphere Dimensions
Surface Area Formulas
Sphere
SA = 4πr²
Where r is the radius. A sphere has one continuous curved surface.
Cube
SA = 6s²
Where s is the side length. A cube has 6 identical square faces.
Rectangular Prism
SA = 2(lw + lh + wh)
Where l = length, w = width, h = height. Has 6 rectangular faces in 3 pairs.
Cylinder
SA = 2πr² + 2πrh
Where r = radius, h = height. Includes two circular bases plus curved surface.
Cone
SA = πr² + πrl
Where r = radius, l = slant height. Includes circular base plus curved surface.
Square Pyramid
SA = s² + 2sl
Where s = base side, l = slant height. Includes square base plus 4 triangular faces.