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    • Surface Area Calculation Tool

    Use these forms to calculate surface area of common shaped items.

    Two Dimensional Objects

    Square and Rectangle:

    Rectangle

    Length: Height:
    Plate Both Sides? Yes
      No
      Answer:

    Circle:

    Circle

    Radius(r):
    Plate Both Sides? Yes
      No
    Answer:

    Ellipse:

    Ellipse

    r1: r2:
    Plate Both Sides? Yes
      No
      Answer:

    Triangle:

    Triangle

    Base (b): Height (h):
    Plate Both Sides? Yes
      No
      Answer:

    Parallelogram:

    Parallelogram

    Base (b): Height (h):
    Plate Both Sides? Yes
      No
      Answer:

    Three Dimensional Objects

    Cube or Brick :

    Cube or Brick

    Length (l): Width (w): Height (h):
      Answer:

    Pyramid:

    Calculate the area of all the triangular sides of the pyramid using the triangle tool above. Add the surface area of the base, which may be rectangular, or triangular.

    Sphere:

    Sphere

    Radius (r): Answer:
     

    Egg:

    Egg

    Radius 1 (r1): Radius 2 (r2): Answer:
       

    Cylinder:

    Cylinder

    Radius (r): Height (h): Answer:
       

    Tube:

    Cylinder

    Radius (r): Height (h):
    Plate Inside Of Tube ? Yes
      No
      Answer:

    Bolts:

    Bolts

    Radius (r): Length (L):  
    Height of Head (H): Length of Head (F):  
      Answer:

    Complex Shapes:

    Complex Shapes

    To effectively work out a complex surface area, as shown left.

    Simply place an imaginary grid of 1” squares over the part, and count the whole squares. Then go around the perimeter and add up all the squares that are more than ½ full. Divide the total by 2 and add this to your total of completely filled squares.

    Another method is to cover the part with one layer of paper or tinfoil. Then remove the tinfoil and cut into smaller pieces so it can be arranged on the floor as close to a rectangle shape as possible. Then simply multiply length x width of the rectangle.