Surface Area Calculator
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.