Calculate the surface area and volume of various 3D shapes including cubes, spheres, cylinders, cones, and more with detailed step-by-step solutions.
Select Shape & Enter Dimensions
Results
Enter dimensions to calculate surface area
Surface Area Formulas
Cube
SA = 6s²
Rectangular Prism
SA = 2(lw + lh + wh)
Sphere
SA = 4πr²
Cylinder
SA = 2πr(r + h)
Cone
SA = πr(r + l)
l = slant height
Triangular Prism
SA = 2A + Ph
A = triangle area, P = perimeter
Square Pyramid
SA = a² + 2al
a = base, l = slant height
Frequently Asked Questions
Surface area is the total area of all the surfaces of a 3D object. It's measured in square units (like cm², m², etc.) and represents how much material would be needed to cover the entire surface of the object.
Tips
Enter the dimensions in the same unit for consistency.
Results update automatically as you type.
Use the unit selector to convert between different measurement systems.